Escape Regular Expression's Special Characters?

Jun 14, 2010

am in need of escaping the regular expression special characters like '/', '.', '*', '+', '?', '|','(', ')', '[', ']', '{', '}', '\'.I have try with this by the following javascript but i can not achieve that.

RegExp.escape=function(str)
{
if (!arguments.callee.sRE) {

[code]....

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Regular Expression Methods, Problem With Escape Characters

Sep 13, 2006

Attempting to use javascript's regular expression methods to match a
particular lab number and building which would then be copied to a pair
of textfields, I found that general matching characters needing a
backslash were not recoginized. The following adapted code that finds
a two-button radio selection shows my problem:

function labstat(){
for (i=1; i<3; i++){
if(document.tester.rm_mod[i-1].checked){
var lb = document.tester.elements["lab"+(i)].value;//either
214 or 215*
var bld = document.tester.bldg.value;
if(/*/.test(lb)){ //error:Undetermined comment
// if(/*/.test(lb)){ //error:Syntax error
// if(/5/.test(lb)){ //works to match only 215*
// if(/5*/.test(lb)){ //true for all
// if(/ddd/.test(lb)){ //false for all
document.tester.room1.value = lb;
document.tester.bldg1.value = bld;
}
}
}

It appears that the escaped characters are not recognized, whichever
form of the method is used, i.e var re = /*/; // or = new
RegExp("*");
if(re.test(lb)){
--------
With the --.match(__) method I have the same problem.

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Dec 10, 2009

Can anyone tell me how to escape the special characters(like &,^,%,$ etc) in a string using Javascript?

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Dec 2, 2010

I'm using HAML to make html templates but am having a problem in writing attributes which will be replaced with JavaScript string templating.

The line in question looks like this:
%div{:class => "<%= from_class %>"}
HAML tries to encode the <%= %> tags:
<div class="&lt;%= from_class %&gt;">

I don't want that to happen in this case... Anyone know how to do this?

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Jan 27, 2010

This is my first serious attempt at using a regular expression.My first name field should allow alpha characters only [A-Za-z], but it seems to be testing for the presence of 1 alpha character. If one is found in the string then anything else is allowed.Bob returns valid which is what I need.Bob1 returns valid but should NOT be valid..1 returns valid not valid which is what I need.My code.

function isValidFirstName(p1_firstName) {
//http://www.javascriptkit.com/jsref/regexp.shtml
var re = new RegExp("[A-Za-z]");

[code]....

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Sep 19, 2009

I have the following code:

var str = "/dev/filler/test0/";
var patt = new RegExp("/test0/$");
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document.write(result);
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in the var patt line I would like to replace the hardcoded test0 string with an expression that matches any characters between the two forward slashes. I have tried with little success.

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Jun 28, 2010

I wanted to try creating a basic expression first. I want someone to enter a string that is 2 - 20 characters long and only has letters. This is what I use so far, and it doesn't work, nothing happens at all when I run it.

Code:
// Check for a valid name.
var namePattern = new RegExp("/^[a-zA-Z]{2,20}$/");
if (namePattern.test(name))
{
window.alert("Invalid");
}

name comes from a input box I display on screen. Also, I would like to update the expression so that there can be one space in the string, but it cannot be at the beginning or end. So this string is like a persons name. Bob is OK, Bob Smith is also OK. Edit: Actually, it is doing something but its always coming back invalid.

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Aug 3, 2010

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I have a problem displaying a divbox containing a html-textarea -
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function show(divbox)
{
divbox.style.display=''
}

<div id="divbox" style="display:none" >
<form action="action.php" method="post>
<textarea name ="txt">Text</textarea>
</form>
</div>

If the Text in the textarea is for instance
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it works fine, while
HERE IS A 'QUOTE'
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<br>-tags works fine, but
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Jul 20, 2005

I have a number of scripts that take special characters and convert them
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However I am running into a problem that I have some of those fields are
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the array would be:

var my_array = [ ["52","Source Data"], ["19","Body &amp;
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Then I have some javascript that creates the cell and inserts the value
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var x = my_array[1][1]; // this would be "Body &amp; Soap"

//create the cell
myTD=document.createElement("TD");

//create the text node
myText=document.createTextNode(x);

// Appends each node following the structure.
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What I see on the output is: "Body &amp; Soap"

What I should see is: "Body & Soap"

Anyone know how to get around this?

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May 14, 2011

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Apr 14, 2010

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Nov 6, 2009

i have a special java code for input strings like:

Code:

<script type="text/javascript">
String.prototype.toCapitalCase = function() {
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[Code]....

But i dont know how to make it work in <input> and this is also without spaces check ..

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[Code]...

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