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What I am trying to do: As stated in the title, I want to set the CSS of a word if it is a reserved word.

HTML 

<html>
    <body>
        <code id="java">
            public static void main(String[] args)<br>
            {
                <pre>    System.out.println("Hello World!");</pre>
            }
        </code>
    </body>
</html>

jQuery

$(document).ready(function()
{
    // Get the text inside the code tags
    var code  = $("#java").text();

    // Split up each word
    var split = code.split(' ');

    // Array of reserved words
    var array = ["abstract","assert","boolean","break","byte","case",
                 "catch","char","class","const","continue","default",
                 "do","double","else","else if","enum","extends","final",
                 "finally","float","for","goto","if","import","implements",
                 "instanceof","int","interface","long","native","new","null",
                 "package","private","protected","public","return","short",
                 "static","strictfp","super","switch","synchronized","this",
                 "throw","throws","transient","void","volatile","while"];

    // Added when text contains a reserved word
    var css = {'font-weight':'bold','color':'#2400D9'}

    array = jQuery.map(array, function(n,i)
    {
        for (int j=0; j<array.length; j++)
        {
            if (split[i].contains(array[j]))
                split[i].css(css);
        }
    });
});

Problem: I have referred to the documentation for several methods (in the references section below), but I'm not too sure where the problem(s) lies. To narrow the issue down, my question(s) would be...

  1. Is .split() even a method in jQuery?
  2. Should I use a for loop to run through all the words in the array (to see if the code contains a reserved word) or is there a better approach (such as .each())?
  3. If I should use .each(), could someone please give me a simple example? I don't understand the examples in the documentation.

References

  • .split() in jQuery
  • .map()
  • .each()

What I am trying to do: As stated in the title, I want to set the CSS of a word if it is a reserved word.

HTML 

<html>
    <body>
        <code id="java">
            public static void main(String[] args)<br>
            {
                <pre>    System.out.println("Hello World!");</pre>
            }
        </code>
    </body>
</html>

jQuery

$(document).ready(function()
{
    // Get the text inside the code tags
    var code  = $("#java").text();

    // Split up each word
    var split = code.split(' ');

    // Array of reserved words
    var array = ["abstract","assert","boolean","break","byte","case",
                 "catch","char","class","const","continue","default",
                 "do","double","else","else if","enum","extends","final",
                 "finally","float","for","goto","if","import","implements",
                 "instanceof","int","interface","long","native","new","null",
                 "package","private","protected","public","return","short",
                 "static","strictfp","super","switch","synchronized","this",
                 "throw","throws","transient","void","volatile","while"];

    // Added when text contains a reserved word
    var css = {'font-weight':'bold','color':'#2400D9'}

    array = jQuery.map(array, function(n,i)
    {
        for (int j=0; j<array.length; j++)
        {
            if (split[i].contains(array[j]))
                split[i].css(css);
        }
    });
});

Problem: I have referred to the documentation for several methods (in the references section below), but I'm not too sure where the problem(s) lies. To narrow the issue down, my question(s) would be...

  1. Is .split() even a method in jQuery?
  2. Should I use a for loop to run through all the words in the array (to see if the code contains a reserved word) or is there a better approach (such as .each())?
  3. If I should use .each(), could someone please give me a simple example? I don't understand the examples in the documentation.

References

  • .split() in jQuery
  • .map()
  • .each()
  • javascript
  • jquery
  • html
  • css
  • reserved-words
Share Improve this question edited May 23, 2017 at 11:51 CommunityBot 11 silver badge asked Mar 16, 2012 at 21:16 anonanon 4
  • jQuery is JavaScript and uses JavaScript methods all the time. Check this post, it may help a lot - stackoverflow./questions/784012/… – Jay Blanchard Commented Mar 16, 2012 at 21:19
  • .split() is a string method in JavaScript. So it's also a string method in jQuery ;). – Zeta Commented Mar 16, 2012 at 21:19
  • 1 btw, $.each() performs a bit slower than native JS for loop (jsperf./jquery-vs-lowdash-loops/4), but it's much more convenient to use. When there are not a lot of elements I prefer .each(). With more elements performance difference starts showing and then I usually use a usual for loop. – Arman Bimatov Commented Nov 16, 2013 at 3:55
  • @ArmanBimatov Not if I'm running Firefox 24.0... ;) – anon Commented Nov 19, 2013 at 2:47
Add a ment  | 

2 Answers 2

Reset to default 4

If I understood correctly, you can achieve what you want using $.inArray and wrapping the reserved word with a span tag. See my DEMO

Edit: Below is from jQuery $.inArray documentation.

$.inArray( value, array [, fromIndex] ) -

valueThe value to search for.

arrayAn array through which to search.

fromIndexThe index of the array at which to begin the search. The default is 0, which will search the whole array.

..read more..

CSS

.code {
    font-weight: bold;
    color: #2400D9;
}

JS

$(document).ready(function() {
    // Get the text inside the code tags
    var code = $("#java").html();

    // Split up each word
    var split = code.split(' ');

    // Array of reserved words
    var array = ["abstract", "assert", "boolean", "break", "byte", "case", "catch", "char", "class", "const", "continue", "default", "do", "double", "else", "else if", "enum", "extends", "final", "finally", "float", "for", "goto", "if", "import", "implements", "instanceof", "int", "interface", "long", "native", "new", "null", "package", "private", "protected", "public", "return", "short", "static", "strictfp", "super", "switch", "synchronized", "this", "throw", "throws", "transient", "void", "volatile", "while"];

    for (var j = 0; j < split.length; j++) {
        if ($.inArray(split[j], array) > 0) {
            split[j] = '<span class="code">' + split[j] + '</span>';
        }
    }

    $("#java").html(split.join(' '));
});

I asked myself this question a few months ago, after a lot of searching I found this:

http://forum.jquery./topic/wrapping-specific-words-inside-span-elements#14737000001028912

which I addapted into the following jQuery plugin:

$.fn.applyKeyword = function(opt, selector) {
    var numOfKeys = opt.keys.length;

    if (typeof selector == 'undefined') {
        selector = ":visible:not(:input):not(label):not(select)";
    }

    for (var i = 0; i < numOfKeys; i++) {
        if (opt.keys[i].partials) {
            var re = new RegExp("(" + opt.keys[i].keyword + ")", 'ig');
        } else {
            var re = new RegExp("(\\b" + opt.keys[i].keyword + "\\b)", 'ig');
        }
        $(selector, this).contents().filter(function() {
            return this.nodeType != 1;
        }).each(function() {
            var output = $(this).text().replace(re, opt.keys[i].prefix + "$1" + opt.keys[i].suffix);
            if (output != $(this).text()) {
                $(this).wrap("<p></p>").parent('p').html(output).contents().unwrap();
            }
        })
    }
}

It doesn't have a way to 'undo' the keyword wrapping but it suited my needs.

If you need an example how to implement this I'd be happy to make one if you provide some text I can test it on....

本文标签： javascriptSet CSS of code when it contains reserved wordsStack Overflow

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