{"id":23469,"date":"2019-01-09T16:15:23","date_gmt":"2019-01-09T14:15:23","guid":{"rendered":"http:\/\/www.webcodegeeks.com\/?p=23469"},"modified":"2019-01-09T16:02:12","modified_gmt":"2019-01-09T14:02:12","slug":"javascript-array-concat-example","status":"publish","type":"post","link":"https:\/\/www.webcodegeeks.com\/javascript\/javascript-array-concat-example\/","title":{"rendered":"JavaScript Array concat() Example"},"content":{"rendered":"<p>Greetings readers, in this tutorial, we will understand the array <code>concat()<\/code> method in the JavaScript language.<\/p>\n<h2>1. Introduction<\/h2>\n<p><strong>JavaScript<\/strong> is an object-oriented programming language that allows the <em>client-side scripting<\/em> to interact with a user and deliver the dynamic pages. Most web browsers including Google Chrome, Mozilla Firefox, Safari, Internet Explorer, Microsoft Edge, Opera, etc. support it. The JavaScript scripting language includes:<\/p>\n<ul>\n<li>Declaring variables<\/li>\n<li>Maintaining the retrieving values<\/li>\n<li>Defining and invoking functions<\/li>\n<li>Defining classes<\/li>\n<li>Load and use external modules<\/li>\n<li>Define event handlers<\/li>\n<li>And much more \u2026.<\/li>\n<\/ul>\n<p>[ulp id=&#8217;tCIwOngQUb3zSUuF&#8217;]<\/p>\n<h3>1.1 Advantages of JavaScript Language<\/h3>\n<p>The pros of using the JavaScript scripting language are:<\/p>\n<ul>\n<li>JavaScript is easy to learn<\/li>\n<li>It executes on client&#8217;s browser, so eliminates the server-side processing and be executed on any OS<\/li>\n<li>JavaScript can be used with any type of web page e.g. PHP, ASP.NET, Perl etc<\/li>\n<li>Web-page performance increases due to client-side execution<\/li>\n<li>JavaScript code can be minified to decrease the loading time from the server<\/li>\n<li>Many JavaScript-based application frameworks are available in the market to create Single page web applications e.g. AngularJS, ReactJS etc.<\/li>\n<\/ul>\n<h3>1.2 Disadvantages of JavaScript Language<\/h3>\n<p>The cons of using the JavaScript scripting language are:<\/p>\n<ul>\n<li>Does not have any multi-threading or multi-processing capabilities<\/li>\n<li>Does not allow the file reading and writing capabilities<\/li>\n<\/ul>\n<h3>1.3 JavaScript Array concat() Method<\/h3>\n<p>The array <code>concat()<\/code> method merges two or more arrays and returns a new array. This method does not replace anything in the original array but instead returns a shallow copy that contains copies of the elements combined from the original array. The method has the following syntax.<\/p>\n<pre class=\"brush:js; wrap-lines:false;\">myArray.concat(array1, array2, .... , arrayN);<\/pre>\n<p>Where,<\/p>\n<ul>\n<li><code>array1, array2, .... , arrayN<\/code> represent the arrays to be combined<\/li>\n<\/ul>\n<h2>2. JavaScript Array concat() Example<\/h2>\n<p>Here is a systematic guide for implementing this tutorial using the JavaScript language.<\/p>\n<h3>2.1 Tools Used<\/h3>\n<p>We are using Eclipse Kepler SR2, JDK 8 and Maven. Having said that, we have tested the code against JDK 1.7 and it works well.<\/p>\n<h3>2.2 Project Structure<\/h3>\n<p>Firstly, let us review the final project structure if you are confused about where you should create the corresponding files or folder later!<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" width=\"408\" height=\"288\" src=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/project-structure-guide-img1.jpg\" alt=\"JavaScript Array concat() - Project Structure\" class=\"wp-image-23470\" srcset=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/project-structure-guide-img1.jpg 408w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/project-structure-guide-img1-300x212.jpg 300w\" sizes=\"(max-width: 408px) 100vw, 408px\" \/><figcaption>Fig. 1: Application Project Structure<\/figcaption><\/figure><\/div>\n\n\n<h3>2.3 Project Creation<\/h3>\n<p>This section will show on how to create a Java-based Maven project with Eclipse. In Eclipse Ide, go to <code>File -&gt; New -&gt; Maven Project<\/code>.<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" width=\"657\" height=\"690\" src=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/js_array_concat_project_guide_1.jpg\" alt=\"JavaScript Array concat() - Create a Maven Project\" class=\"wp-image-23471\" srcset=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/js_array_concat_project_guide_1.jpg 657w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/js_array_concat_project_guide_1-286x300.jpg 286w\" sizes=\"(max-width: 657px) 100vw, 657px\" \/><figcaption>Fig. 2: Create a Maven Project<\/figcaption><\/figure><\/div>\n\n\n<p>In the New Maven Project window, it will ask you to select the project location. By default, &#8216;Use default workspace location&#8217; will be selected. Just click on the next button to proceed.<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" width=\"598\" height=\"543\" src=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/js_array_concat_project_guide_2.jpg\" alt=\"JavaScript Array concat() - Project Details\" class=\"wp-image-23472\" srcset=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/js_array_concat_project_guide_2.jpg 598w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/js_array_concat_project_guide_2-300x272.jpg 300w\" sizes=\"(max-width: 598px) 100vw, 598px\" \/><figcaption>Fig. 3: Project Details<\/figcaption><\/figure><\/div>\n\n\n<p>Select the &#8216;Maven Web App&#8217; Archetype from the list of options and click next.<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" width=\"515\" height=\"541\" src=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/js_array_concat_project_guide_3.jpg\" alt=\"JavaScript Array concat() - Archetype Selection \" class=\"wp-image-23473\" srcset=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/js_array_concat_project_guide_3.jpg 515w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/js_array_concat_project_guide_3-286x300.jpg 286w\" sizes=\"(max-width: 515px) 100vw, 515px\" \/><figcaption>Fig. 4: Archetype Selection<\/figcaption><\/figure><\/div>\n\n\n<p>It will ask you to &#8216;Enter the group and the artifact id for the project&#8217;. We will input the details as shown in the below image. The version number will be by default: <code>0.0.1-SNAPSHOT<\/code>.<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" width=\"597\" height=\"537\" src=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/js_array_concat_project_guide_4.jpg\" alt=\"JavaScript Array concat() - Archetype Parameters\" class=\"wp-image-23474\" srcset=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/js_array_concat_project_guide_4.jpg 597w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/js_array_concat_project_guide_4-300x270.jpg 300w\" sizes=\"(max-width: 597px) 100vw, 597px\" \/><figcaption>Fig. 5: Archetype Parameters<\/figcaption><\/figure><\/div>\n\n\n<p>Click on Finish and the creation of a maven project is completed. If you see, it has downloaded the maven dependencies and a <code>pom.xml<\/code> file will be created. It will have the following code:<\/p>\n<p><span style=\"text-decoration: underline\"><em>pom.xml<\/em><\/span><\/p>\n<pre class=\"brush:xml; wrap-lines:false;\">&lt;project xmlns=\"http:\/\/maven.apache.org\/POM\/4.0.0\" xmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xsi:schemaLocation=\"http:\/\/maven.apache.org\/POM\/4.0.0 http:\/\/maven.apache.org\/xsd\/maven-4.0.0.xsd\"&gt;\n\t&lt;modelVersion&gt;4.0.0&lt;\/modelVersion&gt;\n\t&lt;groupId&gt;com.javascript&lt;\/groupId&gt;\n\t&lt;artifactId&gt;JavascriptArrayconcat&lt;\/artifactId&gt;\n\t&lt;version&gt;0.0.1-SNAPSHOT&lt;\/version&gt;\n\t&lt;packaging&gt;war&lt;\/packaging&gt;\n&lt;\/project&gt;\n<\/pre>\n<h2>3. Application Building<\/h2>\n<p>Let us create an application to understand the basic building blocks of this tutorial.<\/p>\n<h3>3.1 Define the HTML<\/h3>\n<p>Let us write a simple index page in the <code>JavascriptArrayconcat\/src\/main\/webapp\/<\/code> folder. Add the following code to it:<\/p>\n<p><span style=\"text-decoration: underline\"><em>index.jsp<\/em><\/span><\/p>\n<pre class=\"brush:html; wrap-lines:false;\">&lt;!-- JavaScript Array \"concat()\" example --&gt;\n&lt;div id=\"title\"&gt;\n\t&lt;h4 class=\"text-info\"&gt;What is a Array \"concat()\" method?&lt;\/h4&gt;\n\t&lt;ul&gt;\n\t\t&lt;li&gt;The javascript array &lt;code&gt;concat()&lt;\/code&gt; method combines two or more arrays and returns a new array.&lt;\/li&gt;\n\t\t&lt;li&gt;This method returns a &lt;em&gt;shallow copy&lt;\/em&gt; that contains copies of the same elements combines from the original arrays.&lt;\/li&gt;\n\t\t&lt;li&gt;Syntax: &lt;pre&gt;myArray.concat(array1, array2, ....., arrayN);&lt;\/pre&gt;&lt;\/li&gt;\n\t&lt;\/ul&gt;\n&lt;\/div&gt;\n&lt;div&gt;&nbsp; &lt;\/div&gt;\n\n&lt;p&gt;Click the 'button' to join the arrays.&lt;\/p&gt;\n&lt;button id=\"btn_submit\" type=\"button\" class=\"btn btn-success\" onclick=\"myfunction();\"&gt;Click me&lt;\/button&gt;\n&lt;div&gt;&nbsp; &lt;\/div&gt;\n<\/pre>\n<h3>3.2 Define the JavaScript function<\/h3>\n<p>Let us write a simple javascript function that will help developers understand the <code>concat()<\/code> method in the javascript language. Add the following code to it:<\/p>\n<p><span style=\"text-decoration: underline\"><em>JavaScript function<\/em><\/span><\/p>\n<pre class=\"brush:js; wrap-lines:false;\">\/\/ Javascript function to concat the two arrays.\nfunction myfunction() {\n\tlet realmadrid = ['Gareth Bale', 'Karim Benzema', 'Sergio Ramos'];\n\tlet barcelona = ['Messi', 'Luis suarez\t', 'Gerard Pique'];\n\n\tlet players = realmadrid.concat(barcelona);\n\tdocument.getElementById(\"result\").innerHTML = players;\n}\n<\/pre>\n<h3>3.3 First application<\/h3>\n<p>Complete the above steps and save the file. Let us see the sample code snippet.<\/p>\n<p><span style=\"text-decoration: underline\"><em>index.jsp<\/em><\/span><\/p>\n<pre class=\"brush: html; wrap-lines:false;\">&lt;!DOCTYPE html&gt;\n&lt;html lang=\"en\"&gt;\n\n&lt;head&gt;\n    &lt;title&gt;Index page&lt;\/title&gt;\n    &lt;meta http-equiv=\"Content-Type\" content=\"text\/html; charset=ISO-8859-1\"&gt;\n    &lt;link rel=\"stylesheet\" href=\"https:\/\/maxcdn.bootstrapcdn.com\/bootstrap\/3.3.7\/css\/bootstrap.min.css\"&gt;\n&lt;\/head&gt;\n\n&lt;body&gt;\n    &lt;div class=\"container\"&gt;\n        &lt;h2 align=\"center\" class=\"text-danger\"&gt;Array &lt;code&gt;concat()&lt;\/code&gt; method in JavaScript&lt;\/h2&gt;\n        &lt;hr \/&gt;\n\n        &lt;!-- JavaScript Array \"concat()\" example --&gt;\n        &lt;div id=\"title\"&gt;\n            &lt;h4 class=\"text-info\"&gt;What is a Array \"concat()\" method?&lt;\/h4&gt;\n            &lt;ul&gt;\n                &lt;li&gt;The javascript array &lt;code&gt;concat()&lt;\/code&gt; method combines two or more arrays and returns a new array.&lt;\/li&gt;\n                &lt;li&gt;This method returns a &lt;em&gt;shallow copy&lt;\/em&gt; that contains copies of the same elements combines from the original arrays.&lt;\/li&gt;\n                &lt;li&gt;Syntax: &lt;pre&gt;myArray.concat(array1, array2, ....., arrayN);&lt;\/pre&gt;&lt;\/li&gt;\n            &lt;\/ul&gt;\n        &lt;\/div&gt;\n        &lt;div&gt;&nbsp; &lt;\/div&gt;\n\n        &lt;p&gt;Click the 'button' to join the arrays.&lt;\/p&gt;\n        &lt;button id=\"btn_submit\" type=\"button\" class=\"btn btn-success\" onclick=\"myfunction();\"&gt;Click me&lt;\/button&gt;\n        &lt;div&gt;&nbsp; &lt;\/div&gt;\n\n        &lt;div id=\"result\"&gt;&lt;\/div&gt;\n    &lt;\/div&gt;\n    &lt;script&gt;\n    \t\/\/ Javascript function to concat the two arrays.\n        function myfunction() {\n            let realmadrid = ['Gareth Bale', 'Karim Benzema', 'Sergio Ramos'];\n            let barcelona = ['Messi', 'Luis suarez', 'Gerard Pique'];\n\n            let players = realmadrid.concat(barcelona);\n            document.getElementById(\"result\").innerHTML = players;\n        }\n    &lt;\/script&gt;\n&lt;\/body&gt;\n\n&lt;\/html&gt;\n<\/pre>\n<h2>4. Run the Application<\/h2>\n<p>As we are ready for all the changes, let us compile the project and deploy the application on the Tomcat7 server. To deploy the application on Tomat7, right-click on the project and navigate to <code>Run as -&gt; Run on Server<\/code>.<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" width=\"792\" height=\"390\" src=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/project-deploy-guide-img1.jpg\" alt=\"JavaScript Array concat() - Deploy Application on Tomcat\" class=\"wp-image-23475\" srcset=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/project-deploy-guide-img1.jpg 792w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/project-deploy-guide-img1-300x148.jpg 300w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/project-deploy-guide-img1-768x378.jpg 768w\" sizes=\"(max-width: 792px) 100vw, 792px\" \/><figcaption>Fig. 6: How to Deploy Application on Tomcat<\/figcaption><\/figure><\/div>\n\n\n<p>Tomcat will deploy the application in its web-apps folder and shall start its execution to deploy the project so that we can go ahead and test it in the browser.<\/p>\n<h2>5. Project Demo<\/h2>\n<p>Open your favorite browser and hit the following URL to display the application\u2019s index page as shown in Fig. 7.<\/p>\n<pre class=\"brush:plain; wrap-lines:false;\">http:\/\/localhost:8082\/JavascriptArrayconcat\/<\/pre>\n<p>Server name (localhost) and port (8082) may vary as per your Tomcat configuration.<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" width=\"815\" height=\"231\" src=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/project-demo-guide-img1.jpg\" alt=\"JavaScript Array concat() - Index page \" class=\"wp-image-23476\" srcset=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/project-demo-guide-img1.jpg 815w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/project-demo-guide-img1-300x85.jpg 300w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/project-demo-guide-img1-768x218.jpg 768w\" sizes=\"(max-width: 815px) 100vw, 815px\" \/><figcaption>Fig. 7: Index page<\/figcaption><\/figure><\/div>\n\n\n<p>Users can click the button to display the result and can change the js function to debug the <code>concat()<\/code> method. That is all for this tutorial and I hope the article served you whatever you were looking for. Happy learning and do not forget to share.<\/p>\n<h2>6. Conclusion<\/h2>\n<p>In this section, developers learned how to create a simple application with the JavaScript language. Developers can download the sample application as an Eclipse project in the <a href=\"#projectDownload\">Downloads<\/a> section.<\/p>\n<h2><a name=\"projectDownload\"><\/a>7. Download the Eclipse Project<\/h2>\n<p>This was a beginner\u2019s tutorial to understand the array <code>concat()<\/code> method in the javascript language.<\/p>\n<div class=\"download\"><strong>Download<\/strong><br>You can download the full source code of this example here: <a target=\"_blank\" href=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2019\/01\/JavascriptArrayconcat.zip\"><strong>JavascriptArrayconcat<\/strong><\/a><\/div>","protected":false},"excerpt":{"rendered":"<p>Greetings readers, in this tutorial, we will understand the array concat() method in the JavaScript language. 1. Introduction JavaScript is an object-oriented programming language that allows the client-side scripting to interact with a user and deliver the dynamic pages. Most web browsers including Google Chrome, Mozilla Firefox, Safari, Internet Explorer, Microsoft Edge, Opera, etc. support &hellip;<\/p>\n","protected":false},"author":2162,"featured_media":920,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[82],"class_list":["post-23469","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-javascript","tag-javascript"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>JavaScript Array concat() Example - Web Code Geeks - 2026<\/title>\n<meta name=\"description\" content=\"Interested to learn more about JavaScript? Then check out our detailed example on JavaScript Array concat()! 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