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Source: https://devhubby.com/thread/how-can-i-declare-a-and-andt-in-rust

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</h4> <hr role="separator" aria-orientation="horizontal" class="v-divider theme--light"> <div tabindex="-1" role="listitem" class="v-list-item theme--light"> <div class="row post-row" data-v-145a8bfc data-v-145a8bfc>     <div class="col-sm-3 col-md-2 col-lg-1 col-12" data-v-145a8bfc data-v-145a8bfc><div itemscope="itemscope" itemtype="http://schema.org/Person" class="avatar text-center" data-v-145a8bfc><div><div class="v-avatar" style="height:50px;min-width:50px;width:50px;"><div aria-label="kasey" role="img" class="v-image v-responsive theme--light"><div class="v-image__image v-image__image--preload v-image__image--cover" style="background-image:;background-position:center center;"></div><div class="v-responsive__content"></div></div></div></div> <p class="my-0 caption">Member</p> <div><a href="/profile/kasey" class="d-inline-flex"><p itemprop="name" class="subtitle-2 mb-0">
kasey
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kasey </a></span>,
<span class="caption" data-v-145a8bfc>2 years ago</span></div> <div class="forum-text ql-viewer" data-v-145a8bfc><p><span class="mention"><span><span><span class="mention"><span><span><span class="ql-mention-denotation-char">@</span>eric.hamill</span></span></span> </span> </span></span></p><p>In Rust, <code>&[&t]</code> is a slice of references to elements of type <code>t</code>. Here's an example of how you can declare and use it:</p><div style="color:#f8f8f2;background-color:#272822;">
<table style="border-spacing:0;padding:0;margin:0;border:0;"><tbody><tr><td style="vertical-align:top;padding:0;margin:0;border:0;">
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<td style="vertical-align:top;padding:0;margin:0;border:0;;width:100%">
<pre tabindex="0" style="color:#f8f8f2;background-color:#272822;"><span style="color:#66d9ef">fn</span> <span style="color:#a6e22e">main</span>() {
<span style="color:#66d9ef">let</span> a: <span style="color:#66d9ef">&</span>[<span style="color:#f92672">&</span><span style="color:#66d9ef">i32</span>]; <span style="color:#75715e">// Declare a slice of references to i32
</span><span style="color:#75715e"></span> <span style="color:#66d9ef">let</span> x <span style="color:#f92672">=</span> <span style="color:#ae81ff">1</span>;
<span style="color:#66d9ef">let</span> y <span style="color:#f92672">=</span> <span style="color:#ae81ff">2</span>;
a <span style="color:#f92672">=</span> <span style="color:#f92672">&</span>[<span style="color:#f92672">&</span>x, <span style="color:#f92672">&</span>y]; <span style="color:#75715e">// Initialize the slice with references to x and y
</span><span style="color:#75715e"></span> println!(<span style="color:#e6db74">"{:?}"</span>, a); <span style="color:#75715e">// Output: [&1, &2]
</span><span style="color:#75715e"></span>}
</pre></td></tr></tbody></table>
</div>
<p><br/></p><p>In this example, we first declare a variable <code>a</code> of type <code>&[&i32]</code>, which is a slice of references to <code>i32</code> values. We then initialize <code>a</code> with a slice containing references to the variables <code>x</code> and <code>y</code>. Finally, we print out the contents of the slice using the <code>println!</code> macro.</p><p><br/></p><p>Note that when you initialize a slice of references, you need to use the <code>&</code> operator to take a reference to each element.</p><p>
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Here is an example code snippet that demonstrates how you can make a PUT request using the Laravel HTTP client:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-y19ed3r\"\u003Euse IlluminateSupportFacadesHttp;\n\n$response = Http::put('http:\u002F\u002Fexample.com\u002Fapi\u002Fresource', [\n 'key' => 'value'\n]);\n\nif ($response->successful()) {\n \u002F\u002F Request was successful\n $responseData = $response->json();\n \u002F\u002F Do something with the response data\n} else {\n \u002F\u002F Request failed\n $errorCode = $response->status();\n \u002F\u002F Handle the error\n}\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this code snippet:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003EWe use the Http\u003C\u002Fstrong\u003E::put() method to send a PUT request to the specified URL (http:\u002F\u002Fexample.com\u002Fapi\u002Fresource) with the data payload ['key' => 'value'].\u003C\u002Fli\u003E\u003Cli\u003EWe then check if the request was successful by calling the successful() method on the response object.\u003C\u002Fli\u003E\u003Cli\u003EIf the request was successful, we can retrieve the response data using the json() method. You can then perform any further processing on the response data as needed.\u003C\u002Fli\u003E\u003Cli\u003EIf the request failed, we can retrieve the error code using the status() method and handle the error accordingly.\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EThat's how you can send a PUT request in Laravel using the Laravel HTTP client.\u003C\u002Fp\u003E",is_moderated:c,username:"mason",user_active:a,created:"2024-10-14T02:06:42Z"};av.order=a;av.description=v;av.slug="php";aw.id=34528;aw.name=w;aw.messages=7858;aw.threads=3992;aw.meta_title=w;aw.meta_description=w;aw.children=e;aw.icon="category\u002F8bc6a538-1878-494b-a68f-d75c0788e762\u002Fjavascript-logo.png";aw.is_public=b;aw.last_post={id:252503,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Ejimmie.mante\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E",is_moderated:c,username:"nikki_nikolaus",user_active:a,created:"2024-10-15T16:07:00Z"};aw.order=a;aw.description=w;aw.slug="javascript";ax.id=34529;ax.name=x;ax.messages=3440;ax.threads=2090;ax.meta_title=x;ax.meta_description=x;ax.children=e;ax.icon="category\u002Fc450d489-f776-42ad-a307-a876104daf91\u002Fsql.png";ax.is_public=b;ax.last_post={id:254900,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Ewyman\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003ETo join a table with a result column in Oracle, you can use a subquery to generate the result column and then join it with the desired table. Here is an example:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-1pnmc9b\"\u003ESELECT t1.column1, t1.column2, t2.result_column\nFROM table1 t1\nJOIN (SELECT column3 * 2 AS result_column FROM table2) t2\nON t1.column1 = t2.result_column;\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this example, we have two tables (table1 and table2) and we want to join them based on a calculated result column from table2. We use a subquery to calculate the result_column (in this case, multiplying column3 by 2) and then join it with table1 on the desired columns.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EYou can customize the subquery to generate the result column based on your specific requirements. The key is to ensure that the result column is calculated correctly and then joined with the desired table using the appropriate join condition.\u003C\u002Fp\u003E",is_moderated:c,username:ay,user_active:a,created:"2024-11-02T15:23:39Z"};ax.order=a;ax.description=x;ax.slug="sql";az.id=34530;az.name=y;az.messages=1596;az.threads=980;az.meta_title=y;az.meta_description=y;az.children=e;az.icon="category\u002F6a57ef72-267d-44d0-b16f-0f5992a25150\u002Fgo2.png";az.is_public=b;az.last_post={id:256275,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Ekyla.kuvalis\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003ETo parse YAML with a dynamic key in Golang, you can use the \u003Ccode\u003Egopkg.in\u002Fyaml.v2\u003C\u002Fcode\u003E package which provides functions to marshal and unmarshal YAML data.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EHere's an example code snippet to demonstrate how to parse YAML with a dynamic key in Golang:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-b7t6k39\"\u003Epackage main\n\nimport (\n\t"fmt"\n\t"gopkg.in\u002Fyaml.v2"\n\t"io\u002Fioutil"\n)\n\nfunc main() {\n\t\u002F\u002F Define a struct to unmarshal the YAML data into\n\tvar data map[interface{}]interface{}\n\n\t\u002F\u002F Read the YAML file\n\tyamlFile, err := ioutil.ReadFile("data.yaml")\n\tif err != nil {\n\t\tpanic(err)\n\t}\n\n\t\u002F\u002F Unmarshal the YAML data into the struct\n\terr = yaml.Unmarshal(yamlFile, &data)\n\tif err != nil {\n\t\tpanic(err)\n\t}\n\n\t\u002F\u002F Access the dynamic key and its value\n\tdynamicKey := "key1" \u002F\u002F Assuming the dynamic key is "key1"\n\tvalue := data[dynamicKey]\n\tfmt.Println("Value of dynamic key:", value)\n}\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this code snippet:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003EWe define a map with interface{} keys and values to unmarshal the YAML data into, which allows for dynamic keys.\u003C\u002Fli\u003E\u003Cli\u003EWe read the YAML file using ioutil.ReadFile.\u003C\u002Fli\u003E\u003Cli\u003EWe unmarshal the YAML data into the map using yaml.Unmarshal.\u003C\u002Fli\u003E\u003Cli\u003EWe access the value of the dynamic key "key1" (you should replace this with your actual dynamic key).\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EMake sure to replace \u003Ccode\u003E"data.yaml"\u003C\u002Fcode\u003E with the path to your YAML file.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EHope this helps! Let me know if you have any further questions.\u003C\u002Fp\u003E",is_moderated:c,username:"scotty",user_active:a,created:"2024-11-20T10:27:33Z"};az.order=a;az.description=y;az.slug="golang";aA.id=34531;aA.name=z;aA.messages=1452;aA.threads=849;aA.meta_title=z;aA.meta_description=z;aA.children=e;aA.icon="category\u002Ff079ddf7-48d4-4aa3-b2b8-9bf568c958be\u002Fhtmlcss.png";aA.is_public=b;aA.last_post={id:236566,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Eeda.wolff\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003ETo use custom fonts with Tailwind CSS and Nuxt.js, you can follow these steps:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003EAdd your custom font files to your Nuxt.js project. You can do this by placing the font files in the assets\u002Ffonts directory of your Nuxt.js project.\n\u003C\u002Fli\u003E\u003Cli\u003ECreate a CSS file to import and configure your custom fonts. You can create a new CSS file (e.g., custom-fonts.css) in the assets\u002Fcss directory and add the following content:\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-we6a9fd\"\u003E@font-face {\n font-family: 'CustomFont';\n src: url('path\u002Fto\u002Fyour\u002Ffont-file.ttf') format('truetype');\n}\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EReplace \u003Ccode\u003E'CustomFont'\u003C\u002Fcode\u003E with the desired font family name and \u003Ccode\u003E'path\u002Fto\u002Fyour\u002Ffont-file.ttf'\u003C\u002Fcode\u003E with the path to your custom font file.\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003EImport the custom font CSS file in your nuxt.config.js file. Add the following code to your nuxt.config.js file to import the custom font CSS file:\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-bg4x26z\"\u003Ecss: [\n '@\u002Fassets\u002Fcss\u002Fcustom-fonts.css'\n],\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003EUse the custom font in your Tailwind CSS styles. You can now use the custom font in your Tailwind CSS styles by specifying the font family in your HTML or Vue components. For example:\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-h7v9kzm\"\u003E<h1 class="font-CustomFont">Custom Font Title<\u002Fh1>\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EReplace \u003Ccode\u003E'CustomFont'\u003C\u002Fcode\u003E with the font family name specified in your custom font CSS file.\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003EBuild and run your Nuxt.js project. Once you have completed the above steps, build and run your Nuxt.js project to see your custom font in action.\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EThat's it! You have successfully used custom fonts with Tailwind CSS and Nuxt.js.\u003C\u002Fp\u003E",is_moderated:c,username:"santina.kub",user_active:a,created:"2024-06-22T15:27:39Z"};aA.order=a;aA.description=z;aA.slug="html-css";aB.id=34532;aB.name=A;aB.messages=337;aB.threads=223;aB.meta_title=A;aB.meta_description=A;aB.children=e;aB.icon="category\u002F375757a5-d49a-485d-94fc-d28d725ae104\u002Fruby2.png";aB.is_public=b;aB.last_post={id:212726,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Egideon.hauck\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn addition to the code above, you can also use the \u003Ccode\u003Ecreate\u003C\u002Fcode\u003E method with a block to insert data into a database in a more concise way:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-97jubfb\"\u003EArticle.create do |article|\n article.title = "My Article Title"\n article.content = "My Article Content"\nend\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EThis is especially useful when you want to perform additional actions or validations before saving the record.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EYou can also use the \u003Ccode\u003Eimport\u003C\u002Fcode\u003E method to efficiently insert multiple records into the database at once. This method bypasses the lifecycle callbacks and validations, making it much faster than individual \u003Ccode\u003Ecreate\u003C\u002Fcode\u003E or \u003Ccode\u003Esave\u003C\u002Fcode\u003E operations. Here's an example:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-9rl85ye\"\u003Earticles = [\n { title: "Article 1", content: "Content 1" },\n { title: "Article 2", content: "Content 2" },\n { title: "Article 3", content: "Content 3" }\n]\n\nArticle.import(articles)\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EThis will insert the specified records into the database without triggering validations or callbacks. However, keep in mind that the data directly goes into the database, so make sure it's properly sanitized and validated before using this method.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003ERemember to configure your database connection in config\u002Fdatabase.yml file before inserting data into the database.\u003C\u002Fp\u003E",is_moderated:c,username:ay,user_active:a,created:"2024-02-12T11:22:34Z"};aB.order=a;aB.description=A;aB.slug="ruby";aC.id=34533;aC.name=B;aC.messages=4260;aC.threads=3296;aC.meta_title=B;aC.meta_description=B;aC.children=e;aC.icon="category\u002F1c348406-1653-4887-b583-7489de2310f3\u002Fpython.png";aC.is_public=b;aC.last_post={id:256277,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Elaury_ullrich\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003EYou can use the \u003Ccode\u003Eevent.widget\u003C\u002Fcode\u003E attribute to determine which widget triggered an event in Tkinter. This attribute returns a reference to the widget that generated the event. You can then use this reference to perform any necessary actions based on the widget that triggered the event. Here is an example:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-d1z8nqm\"\u003Eimport tkinter as tk\n\ndef on_button_click(event):\n # Get the widget that triggered the event\n widget = event.widget\n \n # Check if the widget that triggered the event is a Button\n if isinstance(widget, tk.Button):\n print("Button clicked")\n elif isinstance(widget, tk.Entry):\n print("Entry box clicked")\n\nroot = tk.Tk()\n\nbutton = tk.Button(root, text="Click Me")\nentry = tk.Entry(root)\n\nbutton.bind("<Button-1>", on_button_click)\nentry.bind("<Button-1>", on_button_click)\n\nbutton.pack()\nentry.pack()\n\nroot.mainloop()\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this example, we have created a button and an entry box in a Tkinter window. We have then bound the \u003Ccode\u003E<Button-1>\u003C\u002Fcode\u003E event (mouse left-click) to the \u003Ccode\u003Eon_button_click\u003C\u002Fcode\u003E function for both the button and the entry box. Within the \u003Ccode\u003Eon_button_click\u003C\u002Fcode\u003E function, we use the \u003Ccode\u003Eevent.widget\u003C\u002Fcode\u003E attribute to determine which widget triggered the event and perform different actions based on the widget.\u003C\u002Fp\u003E",is_moderated:c,username:"ola.stoltenberg",user_active:a,created:"2024-11-20T11:34:58Z"};aC.order=a;aC.description=B;aC.slug="python";aD.id=34534;aD.name=C;aD.messages=1952;aD.threads=1272;aD.meta_title=C;aD.meta_description=C;aD.children=e;aD.icon="category\u002F3f08ec78-9350-4d01-9395-77978dfce7e1\u002Fjava.png";aD.is_public=b;aD.last_post={id:253235,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Emadalyn\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003EThe hibernate config file, typically named \u003Ccode\u003Ehibernate.cfg.xml\u003C\u002Fcode\u003E, should be placed in the root of your application's classpath. This means it can be placed in the \u003Ccode\u003Esrc\u002Fmain\u002Fresources\u003C\u002Fcode\u003E directory for Maven projects, or in the \u003Ccode\u003Esrc\u003C\u002Fcode\u003E directory for Eclipse projects. The Hibernate configuration file should be accessible to the application so that it can parse the configuration settings during startup.\u003C\u002Fp\u003E",is_moderated:c,username:"dewayne_green",user_active:a,created:"2024-10-21T22:12:47Z"};aD.order=a;aD.description=C;aD.slug="java";aE.id=34535;aE.name=D;aE.messages=1188;aE.threads=963;aE.meta_title=D;aE.meta_description=D;aE.children=e;aE.icon="category\u002F427d0e6e-1883-44dd-aa69-96672f1362e5\u002Fc.png";aE.is_public=b;aE.last_post={id:255647,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Edora\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E",is_moderated:c,username:"cameron.mccullough",user_active:a,created:"2024-11-11T14:14:53Z"};aE.order=a;aE.description=D;aE.slug="c-c";aF.id=34536;aF.name=E;aF.messages=663;aF.threads=531;aF.meta_title=E;aF.meta_description=E;aF.children=e;aF.icon="category\u002Fe1951c3a-5f15-4bff-b2a1-43f9148ea154\u002Fswift.png";aF.is_public=b;aF.last_post={id:237328,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Ekarelle_heathcote\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003EThe @observable macro in Swift is used to define a property that will automatically trigger a change notification when its value is changed. This can be helpful when testing properties that are expected to change during the execution of your code.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003ETo use the @observable macro in unit tests in Swift, you can define a property in your test class with the @Published attribute. Here's an example:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-i0tsabz\" language=\"swift\"\u003Eimport XCTest\nimport Combine\n\nclass MyTestClass: XCTestCase {\n\n @Published var myProperty: Int = 0\n\n func testPropertyChange() {\n let cancellable = myProperty.sink { value in\n \u002F\u002F Test the value of the property here\n }\n\n myProperty = 10\n\n \u002F\u002F Make sure to store the cancellable object somewhere to prevent it from being deallocated\n }\n}\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E",is_moderated:c,username:"napoleon",user_active:a,created:"2024-06-24T18:02:39Z"};aF.order=a;aF.description=E;aF.slug="swift";aG.id=Z;aG.name=i;aG.messages=18917;aG.threads=13164;aG.meta_title=aH;aG.meta_description=aH;aG.children=e;aG.icon="category\u002F25bf8071-d225-4b00-add3-5ce12dedc414\u002Fic-2dev.png";aG.is_public=b;aG.last_post={id:202508,message:"\u003Cp\u003EHow to create 2 workspaces in tkinter?\u003C\u002Fp\u003E",is_moderated:c,username:"sabryna",user_active:a,created:"2024-11-21T12:56:28Z"};aG.order=a;aG.description=i;aG.slug=al;return {layout:aj,data:[{sanitizedMessage:ak,thread:{id:106906,name:t,message:"\u003Cp\u003EHow can I declare a &[&t]] in rust?\u003C\u002Fp\u003E",formatted_message:d,hash_tags:"[\"rust\",\"declare\"]",tags:["rust","declare","mywebforum"],category:{id:Z,name:i,messages:a,threads:a,meta_title:d,meta_description:d,children:e,icon:d,is_public:b,order:a,description:i,slug:al},category_id:Z,slug:am,likes:38,dislikes:a,is_closed:b,is_pinned:b,is_moderated:c,username:"eric.hamill",user_active:f,role:g,user_avatar:"avatar\u002Feric.hamill\u002F2779.jpg",created:"2023-03-03T03:55:38Z"},relatedThreads:[{id:106973,title:an,text:an,avatar:"avatar\u002Flibby\u002F3330.jpg",role:g,slug:"how-can-i-declare-a-static-field-in-a-struct-in-rust",username:"libby",created:"2023-03-03T07:01:35Z"},{id:192347,title:ao,text:ao,avatar:"avatar\u002Fdee_smith\u002F2482.jpg",role:g,slug:"how-to-generate-a-rc-t-from-andt-in-rust",username:"dee_smith",created:"2024-08-04T06:11:44Z"},{id:193034,title:ap,text:ap,avatar:"avatar\u002Fkelley\u002F46-2.jpg",role:g,slug:"how-to-convert-from-option-andt-to-andoption-t-in",username:"kelley",created:"2024-08-11T18:08:10Z"},{id:133614,title:aq,text:aq,avatar:"avatar\u002Frozella\u002Fromashka.gif",role:g,slug:"how-do-i-get-a-slice-of-a-vec-t-in-rust",username:"rozella",created:"2023-06-20T22:21:38Z"},{id:189789,title:ar,text:ar,avatar:"avatar\u002Fsamara\u002Favatar_4619.jpg",role:g,slug:"how-to-alias-into-option-t-in-rust",username:"samara",created:"2024-07-11T03:01:04Z"}],socialSettings:{id:1876,size:a,facebook:c,vk:b,ok:b,linkedin:c,telegram:c,whatsapp:c,pocket:b,twitter:c,active:c},page:f,totals:f,postsTotal:f,posts:[{id:139219,message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Eeric.hamill\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn Rust, \u003Ccode\u003E&[&t]\u003C\u002Fcode\u003E is a slice of references to elements of type \u003Ccode\u003Et\u003C\u002Fcode\u003E. Here's an example of how you can declare and use it:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-x2iq3id\" language=\"rust\"\u003Efn main() {\n let a: &[&i32]; \u002F\u002F Declare a slice of references to i32\n let x = 1;\n let y = 2;\n a = &[&x, &y]; \u002F\u002F Initialize the slice with references to x and y\n println!("{:?}", a); \u002F\u002F Output: [&1, &2]\n}\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this example, we first declare a variable \u003Ccode\u003Ea\u003C\u002Fcode\u003E of type \u003Ccode\u003E&[&i32]\u003C\u002Fcode\u003E, which is a slice of references to \u003Ccode\u003Ei32\u003C\u002Fcode\u003E values. We then initialize \u003Ccode\u003Ea\u003C\u002Fcode\u003E with a slice containing references to the variables \u003Ccode\u003Ex\u003C\u002Fcode\u003E and \u003Ccode\u003Ey\u003C\u002Fcode\u003E. Finally, we print out the contents of the slice using the \u003Ccode\u003Eprintln!\u003C\u002Fcode\u003E macro.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003ENote that when you initialize a slice of references, you need to use the \u003Ccode\u003E&\u003C\u002Fcode\u003E operator to take a reference to each element.\u003C\u002Fp\u003E\u003Cp\u003E\n\u003C\u002Fp\u003E",formatted_message:"\u003Cp\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"mention\"\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan class=\"ql-mention-denotation-char\"\u003E@\u003C\u002Fspan\u003Eeric.hamill\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E \u003C\u002Fspan\u003E \u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn Rust, \u003Ccode\u003E&[&t]\u003C\u002Fcode\u003E is a slice of references to elements of type \u003Ccode\u003Et\u003C\u002Fcode\u003E. Here's an example of how you can declare and use it:\u003C\u002Fp\u003E\u003Cdiv style=\"color:#f8f8f2;background-color:#272822;\"\u003E\n\u003Ctable style=\"border-spacing:0;padding:0;margin:0;border:0;\"\u003E\u003Ctbody\u003E\u003Ctr\u003E\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E1\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E2\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E3\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E4\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E5\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E6\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E7\n\u003C\u002Fspan\u003E\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\n\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;;width:100%\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"color:#66d9ef\"\u003Efn\u003C\u002Fspan\u003E \u003Cspan style=\"color:#a6e22e\"\u003Emain\u003C\u002Fspan\u003E() {\n \u003Cspan style=\"color:#66d9ef\"\u003Elet\u003C\u002Fspan\u003E a: \u003Cspan style=\"color:#66d9ef\"\u003E&\u003C\u002Fspan\u003E[\u003Cspan style=\"color:#f92672\"\u003E&\u003C\u002Fspan\u003E\u003Cspan style=\"color:#66d9ef\"\u003Ei32\u003C\u002Fspan\u003E]; \u003Cspan style=\"color:#75715e\"\u003E\u002F\u002F Declare a slice of references to i32\n\u003C\u002Fspan\u003E\u003Cspan style=\"color:#75715e\"\u003E\u003C\u002Fspan\u003E \u003Cspan style=\"color:#66d9ef\"\u003Elet\u003C\u002Fspan\u003E x \u003Cspan style=\"color:#f92672\"\u003E=\u003C\u002Fspan\u003E \u003Cspan style=\"color:#ae81ff\"\u003E1\u003C\u002Fspan\u003E;\n \u003Cspan style=\"color:#66d9ef\"\u003Elet\u003C\u002Fspan\u003E y \u003Cspan style=\"color:#f92672\"\u003E=\u003C\u002Fspan\u003E \u003Cspan style=\"color:#ae81ff\"\u003E2\u003C\u002Fspan\u003E;\n a \u003Cspan style=\"color:#f92672\"\u003E=\u003C\u002Fspan\u003E \u003Cspan style=\"color:#f92672\"\u003E&\u003C\u002Fspan\u003E[\u003Cspan style=\"color:#f92672\"\u003E&\u003C\u002Fspan\u003Ex, \u003Cspan style=\"color:#f92672\"\u003E&\u003C\u002Fspan\u003Ey]; \u003Cspan style=\"color:#75715e\"\u003E\u002F\u002F Initialize the slice with references to x and y\n\u003C\u002Fspan\u003E\u003Cspan style=\"color:#75715e\"\u003E\u003C\u002Fspan\u003E println!(\u003Cspan style=\"color:#e6db74\"\u003E"{:?}"\u003C\u002Fspan\u003E, a); \u003Cspan style=\"color:#75715e\"\u003E\u002F\u002F Output: [&1, &2]\n\u003C\u002Fspan\u003E\u003Cspan style=\"color:#75715e\"\u003E\u003C\u002Fspan\u003E}\n\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\u003C\u002Ftr\u003E\u003C\u002Ftbody\u003E\u003C\u002Ftable\u003E\n\u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this example, we first declare a variable \u003Ccode\u003Ea\u003C\u002Fcode\u003E of type \u003Ccode\u003E&[&i32]\u003C\u002Fcode\u003E, which is a slice of references to \u003Ccode\u003Ei32\u003C\u002Fcode\u003E values. We then initialize \u003Ccode\u003Ea\u003C\u002Fcode\u003E with a slice containing references to the variables \u003Ccode\u003Ex\u003C\u002Fcode\u003E and \u003Ccode\u003Ey\u003C\u002Fcode\u003E. Finally, we print out the contents of the slice using the \u003Ccode\u003Eprintln!\u003C\u002Fcode\u003E macro.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003ENote that when you initialize a slice of references, you need to use the \u003Ccode\u003E&\u003C\u002Fcode\u003E operator to take a reference to each element.\u003C\u002Fp\u003E\u003Cp\u003E\n\u003C\u002Fp\u003E",is_moderated:c,likes:a,dislikes:a,thread_title:t,thread_slug:am,username:"kasey",user_avatar:"avatar\u002Fkasey\u002Favatar-n-254-s.jpg",user_active:f,role:g,role_logo:d,created:"2023-03-03T07:09:14Z"}]}],fetch:{},error:e,state:{loading:a,settings:{id:8542,name:j,domain:"devhubby.com",port:80,plan:f,plan_name:"free",footer_code:"\u003C!-- Global site tag (gtag.js) - Google Analytics --\u003E\n\u003Cscript async src=\"https:\u002F\u002Fwww.googletagmanager.com\u002Fgtag\u002Fjs?id=G-5LBS05BL1D\"\u003E\u003C\u002Fscript\u003E\n\u003Cscript\u003E\n window.dataLayer = window.dataLayer || [];\n function gtag(){dataLayer.push(arguments);}\n gtag('js', new Date());\n\n gtag('config', 'G-5LBS05BL1D');\n\u003C\u002Fscript\u003E\n\n\u003Cscript async src=\"https:\u002F\u002Fpagead2.googlesyndication.com\u002Fpagead\u002Fjs\u002Fadsbygoogle.js?client=ca-pub-4833888168110763\"\n crossorigin=\"anonymous\"\u003E\u003C\u002Fscript\u003E",robots_txt:"User-agent: *\nDisallow: \u002Fsearch\nDisallow: \u002Fadmin\nDisallow: \u002Fprofile\nDisallow: \u002Flogin\nDisallow: \u002Fregister\n\nSitemap: https:\u002F\u002Fdevhubby.com\u002Fsitemap.xml",locale:"en",add_source:a,allow_likes:f,add_watermark:f,add_watermark_position:3,hash:"c64c6733-bfad-4db8-b387-18207476d4d5",default_role:as,allow_hash_tags:f,add_source_text:d,scrollable_pagination:a,meta_title:j,blog_active:b,favicon_png:"\u002Ffavicon.png",favicon_ico:d,custom_css:".amzn-native-container {\n margin: 0 auto;\n}\n \n.forum-text.ql-viewer div{\n border-radius: 5px;\n}",meta_description:j,description:j,logo:"logo\u002Fdev.png",is_related_thread:f,related_thread:at,notify_on_moderation:c,activation:"email",facebook:"https:\u002F\u002Fwww.facebook.com\u002Fgroups\u002Fdevhubby",linkedin:"https:\u002F\u002Fwww.linkedin.com\u002Fgroups\u002F14086432\u002F",twitter:"https:\u002F\u002Ftwitter.com\u002Fdevhubbycom",youtube:"https:\u002F\u002Fdevhubby.tumblr.com\u002F",instagram:"https:\u002F\u002Fwww.instagram.com\u002Fdev_hubby\u002F"},layout:{id:8650,is_dark:a,name:aj,background_full:b,code_theme:"monokai",page_transition:"fade",background:d,background_color:d,text_color:d,text_font_family:"Roboto",primary_color:_,secondary_color:u,accent_color:u,info_color:u,success_color:u,error_color:_,warning_color:_},social_providers:{google:c,facebook:c,github:c},menus:[],showAd:b,darkMode:b,isFooterVisible:b,cdnUrl:"https:\u002F\u002Fforum-static.fra1.cdn.digitaloceanspaces.com",metaOg:{title:t,url:"https:\u002F\u002Fdevhubby.com\u002Fthread\u002Fhow-can-i-declare-a-and-andt-in-rust",type:d,image:d,description:ak,site_name:j},itemsPerPage:15,ad:[{id:23,name:"Own domain footer",css_selector:d,position:2,one_time:b,show_every:a,code:"\u003Cdiv class=\"flex\"\u003E\n\u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FoJqr0c6SR\" target=\"_blank\"\u003E\u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fpromo\u002Fbanner.png\" style=\"max-height:200px; 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