i want to replace specific amount of white-spaces from a String at the beginning and i can use
replace(/^\s{2}/g,"");
and it works .but 2 should be changed according to a value of a variable .so i need to construct a new RegExp()
so i used
var lead=2;
var regex = new RegExp("\^\\s{" + lead + "}//g");
alert("regex "+regex);
real output
/^\s{2}\/\/g/
expected output
/^\s{2}/g
could you help me to fix this problem.tnx
As the param to RegExp is the regex, you don't need the / delimiters. Use the flags as the second parameter to the RegEx() constructor.
var regex = new RegExp("^\\s{" + lead + "}", 'g');
Example:
var lead = 2;
var regex = new RegExp("^\\s{" + lead + "}", 'gmi');
alert(regex);
var str = ' Say My Name';
alert(str.replace(regex, ''));
new RegExp("^\\s{" + lead + "}", "g");
Try
"\^\\s{" + lead + "}\/g"
instead of
"\^\\s{" + lead + "}//g"
I think you wanted to escape the "/", but you accidently used "/" instead of "\".
Related
I know that this's been asked before but none of the suggested solutions worked for me. I've got the following:
var regex = new RegExp(/D0030001 IN/gi);
$("p").filter(function () {
return regex.test(this.id);
}).css("background-color","blue");
This one works fine. However, when I try to do
spl = [];
spl[0] = "D0030001";
spl[1] = "IN";
var regex = new RegExp("/" + spl[0] + " " + spl[1] + "/gi");
$("p").filter(function () {
return regex.test(this.id);
}).css("background-color","blue");
This one doesn't work. In other words I need to use variables to construct the regex pattern. Thanks
You need to use the second argument of RegExp constructor to set the flags and you don't need / / delimiters.
var regex = new RegExp(spl[0] + " " + spl[1], "gi");
I need help in writing regular expression:
part of my string is fixed and another part of its variable.
only if fixed AND variable string exist i need to alter the string other wise no.
Fixed string:example: AA.BBB.COM
Variable string (may or mayn't exist ): US, but if exist it will be always two letter string with any combination of letter.
In below string if I have variable two letter string exist I want to append “.new”
1 ) https://XY**.US**.AA.BBB.COM
Output: https:// XYZ12**.US.NEW**.AA.BBB.COM
2 ) https://XY.UK.AA.BBB.COM
Output: https:// XYZ12.UK.NEW.AA.BBB.COM
3) https://XY.AA.BBB.COM (no variable string so no change)
Output: https:// XY.AA.BBB.COM
Thanks for your help .
Raghav
Something like the following should get you started, there are other methods. Splitting and parsing might suit better depending on your real requirements:
var s = 'https://XY.US.AA.BBB.COM';
var t = 'https://XY.UK.AA.BBB.COM';
var u = 'https://XY.AA.BBB.COM';
var re = /(\.)(UK|US)(\.)/;
alert(
s.replace(re, '$1' + '$2' + '.NEW' + '$3') + '\n' +
t.replace(re, '$1' + '$2' + '.NEW' + '$3') + '\n' +
u.replace(re, '$1' + '$2' + '.NEW' + '$3')
);
Removing %20 in get method?
var c=new Array(a);
(eg: a={"1","2"}) window.location="my_details.html?"+ c + "_";
and in my_details.html :
var q=window.location.search;
alert("qqqqqqqqqqqqq " + q);
var arrayList = (q)? q.substring(1).split("_"):[];
var list=new Array(arrayList);
alert("dataaaaaaaaaaaa " + list + "llll " );
and in "list" its dusplaying me "1%202";
How can I remove this %20 =space value ??
Thanks
just use this:
alert("dataaaaaaaaaaaa " + decodeURIComponent(list) + "llll " );
This should decode the %20 to space
look here: http://www.w3schools.com/jsref/jsref_decodeURIComponent.asp
If there is a space in the parameter(s), then the %20 (URL Encoding) is necessary. You cannot pass a space in a GET request.
If you need to avoid this, use POST.
As far as I can see the problem is being introduced at this line:
window.location="my_details.html?"+ c + "_";
This could be written as:
window.location="my_details.html?"+ c.toString() + "_";
The default .toString() of a JavaScript Array would be to use a delimiter of ,, i.e.
var str = ["1", "2", "3"].toString(); // 1,2,3
In you example it appears that the delimiter being used is a space. This would have been changed by something changing the default behaviour of .toString() on the Array.prototype. Try using the following:
window.location="my_details.html?"+ c.join(",") + "_";
Better to use replace() method to replace %20 to space
list.replace("%20"," ");
In javascript, how would I use a regular expression to replace everything to the right of "Source="
Assume, for example:
var inStr="http://acme.com/mainpage.aspx?ID=25&Source=http://acme.com/fruitPage.aspx"
var newSoruceValue="http://acme.com/vegiePage.aspx"
Goal is to get this value in outStr:
var outStr="http://acme.com/mainpage.aspx?ID=25&Source=http://acme.com/vegiePage.aspx"
Thanks!!
Assumes that source= will always be at the end
var inStr="http://acme.com/mainpage.aspx?ID=25&Source=http://acme.com/fruitPage.aspx"
var newSourceValue="http://acme.com/vegiePage.aspx"
var outStr = inStr.replace( /(Source=).*/, "$1" + newSourceValue);
Is "Source" always linked to the first occurrance of "&"?
You could use
indexOf("&") + 7
(number of letters in the word "Source" + one for "=").
Then create the new string by appending the new source to the substring using the index from before.
string.replace( /pattern/, replace_text );
var outStr = inStr.replace( /&Source=.*$/, "&Source=" + newSoruceValue );
or
var outStr = inStr.replace( /(&Source=).*$/, "$1" + newSoruceValue )
I am trying to match a part of the string and it should be NOT case sensitive. I have the following code but I never get the replaced string.
var name = 'Mohammad Azam'
var result = name.replace('/' + searchText + '/gi', "<b>" + searchText + "</b>");
The searchText variable will be "moha" or "mo" or "moh".
How can I get the matching thing in bold tags.
/pattern/ has meaning when it's put in as a literal, not if you construct string like that. (I am not 100% sure on that.)
Try
var name = 'Mohammad Azam';
var searchText = 'moha';
var result = name.replace(new RegExp('(' + searchText + ')', 'gi'), "<b>$1</b>");
//result is <b>Moha</b>mmad Azam
EDIT:
Added the demo page for the above code.
Demo →
Code
I think you're looking for new RegExp, which creates a dynamic regular expression - what you're trying to do now is match a string ( not a regexp object ) :
var name = 'Mohammad Azam', searchText='moha';
var result = name.replace(new RegExp(searchText, 'gi'), "" + searchText + ""); result
EDIT: Actually, this is probably what you were looking for, nevermind ^
var name = 'Mohammad Azam', searchText='moha';
name.match( new RegExp( searchText , 'gi' ) )[0]
name // "Moha"