javascript split with regex

Question

I would like to split characters into array using javascript with regex

foo=foobar=&foobar1=foobar2=

into

foo, foobar=, foobar1, foobar2=

Sorry for not being clear, let me re describe the scenario. First i would split it by "&" and want to post process it later.

str=foo=foobar=&foobar1=foobar2=
var inputvars=str.split("&")
for(i=0;i<inputvars.length;i++){
   var param = inputvars[i].split("=");
   console.log(param);
}

returns

[foo,foobar]
[]
[foobar1=foobar2]
[]

I tried to use .split("=") but foobar= got splited out as foobar.

I essentially want it to be

[foo,foobar=]
[foobar1,foobar2=]

Any help with using javascript to split first occurence of = only?

Is that really the format? where does it come from. I've never seen something with the =& like that. Other than that, it looks like part of a query string. — Scott Sauyet
– Scott Sauyet, Commented Jul 10, 2012 at 1:53
Can you clarify the precise rules you want to split by? Is this two levels of splitting, the first on &, then on the resulting components using =? — user663031
– user663031, Commented Jul 10, 2012 at 3:00

Michael Lorton · Accepted Answer · 2012-07-10 01:32:45Z

1

/^([^=]*)=(.*)/.exec('foo=foobar=&foobar1=foobar2=')

or simpler to write but using the newer "lazy" operator:

/(.*?)=(.*)/.exec('foo=foobar=&foobar1=foobar2=')

answered Jul 10, 2012 at 1:32

Michael Lorton

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5 Comments

flyclassic Over a year ago

It return the following results ["foo=foobar=&foobar1=foobar2=", "foo", "foobar=&foobar1=foobar2="] which is not intended..

Michael Lorton Over a year ago

@flyclassic -- RegExp always gives the whole match as the first argument. Are the second and third the answer you need?

flyclassic Over a year ago

i know, but the results are still not what i intended LOL it should be ['foo', 'foobar=', 'foobar1', 'foobar2=']

Michael Lorton Over a year ago

@flyclassic - You want every other equal-sign stripped off?

flyclassic Over a year ago

thanks malvolio... you help me solve my problem already...i guess i wasnt clear earlier

flyclassic · Accepted Answer · 2012-07-10 07:37:08Z

0

from malvolio, i got to conclusion below

var str = 'foo=foobar=&foobar1=foobar2=';
var inputvars = str.split("&");
var pattern =  /^([^=]*)=(.*)/;
for (counter=0; counter<inputvars.length; counter++){

     var param = pattern.exec(inputvars[counter]);         
    console.log(param)
}

and results (which is what i intended)

[foo,foobar=]
[foobar1,foobar2=]

Thanks to @malvolio hint of regex Cheers

edited Jul 10, 2012 at 7:37

answered Jul 10, 2012 at 2:54

flyclassic

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