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Join Date: May 2006
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Junior Poster in Training
Help regarding comparison of String in JS How to do this type of comparison.
Say i have a variable with a word "ABCDEF"
and i want to check the combination "DEF" exists in it or not how do i do?
I want to make a simple comparison test..
Some friend suggested me the "substring" function but that works only in JSP i hope?
Please help me out!
Say i have a variable with a word "ABCDEF"
and i want to check the combination "DEF" exists in it or not how do i do?
I want to make a simple comparison test..
Some friend suggested me the "substring" function but that works only in JSP i hope?
Please help me out!
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Join Date: Jul 2006
Location: Deptford, London
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Posting Shark
Use the indexOf() method of the string object:
Javascript Syntax (Toggle Plain Text)
Last edited by MattEvans : Sep 6th, 2007 at 10:09 am.
Plato forgot the nullahedron..
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Join Date: Sep 2007
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Junior Poster in Training
You can certainly do what as Matt suggests. However, in the longer term if you plan to use JS a lot you would be better of learning to use regular expressions. Not necessary in this instance but the power they offer is well worth having under your belt. Here is the RegEx solution to your question
This will write the string 'true' to your document. Naturally, you will want to do something else with the result.
Look here
http://www.regular-expressions.info
for an exhaustive discussion of regular expressions. Do note though that JS regular expressions are no way as powerful as in Perl etc.
function Test()
{
var r = new RegExp("DEF");
var s = "ABCDEF"
document.write(r.test(s));
}This will write the string 'true' to your document. Naturally, you will want to do something else with the result.
Look here
http://www.regular-expressions.info
for an exhaustive discussion of regular expressions. Do note though that JS regular expressions are no way as powerful as in Perl etc.
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