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Re: Javascript insert

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On Mon, 15 Jul 2013 16:41:55 +0100, Ben Bacarisse wrote:

> "Evertjan." <exxjxw.hannivoort@inter.nl.net> writes:
> 
>> Andrew Poulos wrote on 15 jul 2013 in comp.lang.javascript:
>>
>>> On 15/07/2013 11:06 PM, Saurabh Khemka wrote:
>>>> Hi,
>>>>
>>>> I have a javascript variable say, var a = "hello";.
>>>>
>>>> I want to insert something after say, "aaa" so, that the final string
>>>> becomes
>>>>
>>>> "heaaallo". Please help.
>>
>> You should define your Q better,
>> your example could be met with:
>>
>>    var a = 'hello';
>>    a = 'heaaallo';
> 
> This.  There's lot of ways to do it and the right best way is likely to
> depend on things not yet stated.
>>
>>> How about
>>>    var a = "hello";
>>>    a = a.split(""); a.splice(2, 0, "aaa");
>>>    a = a.join("");
>>> ?
>>> 
>>> It will fail if your original string includes a comma.
>>
>> It will NOT fail.
>>
>> ================================
>>
>> Shorter is:
>>
>>    var a = 'hello';
>>    a = a.replace(/(.{2})/, '$1aaa');
> 
> Longer, but probably conceptually simpler, and with fewer special cases
> to consider in the replacement string, is:
> 
>   a.substring(0, 2) + "aaa" + a.substring(2)

Purely in the interests of adding variety of solutions to the thread, I'd 
like to add:

String.prototype.insertAfterFirst = function(after,insert){ 
var there = this.indexOf(after);
return this.substring(0,there+1) + insert + this.substring(there+1);
}

var a = 'hello';
a = a.insertAfterFirst("e",'aaa');

-- 
Denis McMahon, denismfmcmahon@gmail.com

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Thread

Javascript insert Saurabh Khemka <saurabh.khemka4@gmail.com> - 2013-07-15 06:06 -0700
  Re: Javascript insert Andrew Poulos <ap_prog@hotmail.com> - 2013-07-15 23:57 +1000
    Re: Javascript insert "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2013-07-15 16:23 +0200
      Re: Javascript insert Ben Bacarisse <ben.usenet@bsb.me.uk> - 2013-07-15 16:41 +0100
        Re: Javascript insert Denis McMahon <denismfmcmahon@gmail.com> - 2013-07-15 16:17 +0000
          Re: Javascript insert Norman Peelman <npeelman@cfl.rr.com> - 2013-07-15 13:16 -0400
          Re: Javascript insert JJ <duh@nah.meh> - 2013-07-16 01:32 +0700
  Re: Javascript insert Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-07-15 21:15 +0200
    Re: Javascript insert John Harris <niam@jghnorth.org.uk.invalid> - 2013-07-16 16:18 +0100

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