How to select a part of a string with a RegExp and reuse it in a variable

Question

I have this RegExp: var myReg = RegExp("https?://www.youtube.com/watch\?v=[^\"]+",""); to find the youtube link within a string. I then want to make the part of the string matching the RegExp a variable; lets say var url = "part of string matching the RegExp" then I coudl do something like window.location = url; to redirect the browser directly to the video page. Thanks

durum · Accepted Answer · 2013-12-15 19:13:29Z

1

You only have to access the first element of the result, if any:

var r = string.match(myReg);
if(r) var url = r[0];

Take care because is you dont find the url, the result will be a null value

answered Dec 15, 2013 at 19:13

durum

3,4041 gold badge27 silver badges31 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Samuel Charpentier Over a year ago

I let you see the full thing, its not working properly look : jsfiddle.net/a99Ln/3

durum Over a year ago

Your regexp doesnt match the url, it returns a null value. I tried with var myReg = /https?:\/\/www\.youtube\.com\/watch\?v=[^"]+/; and worked fine.

Udi Cohen · Accepted Answer · 2013-12-15 19:10:28Z

0

This should do the trick:

myReg.exec(str);
var url = RegExp.lastMatch;

Udi

answered Dec 15, 2013 at 19:10

Udi Cohen

1,2899 silver badges13 bronze badges

3 Comments

Samuel Charpentier Over a year ago

I let you see the full thing, its not working properly look : jsfiddle.net/a99Ln/3

Udi Cohen Over a year ago

it is because the RegExp is not working as you expected. The RegExp evaluation returns null... check your input / RegExp

Samuel Charpentier Over a year ago

the Reg does work, if you try to alert(plainText) on my example it works

Collectives™ on Stack Overflow

How to select a part of a string with a RegExp and reuse it in a variable

2 Answers 2

2 Comments

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related