Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.javascript > #20666

Re: Javascript insert

Show all headers | View raw

On 07/15/2013 12:17 PM, Denis McMahon wrote:
> 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');
>

   How about:

a.replace("he","$1aaa");



-- 
Norman
Registered Linux user #461062
AMD64X2 6400+ Ubuntu 10.04 64bit

Back to comp.lang.javascript | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

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

csiph-web