Question

Second to last indexOf

Asked by: the_hero

I need to section out some strings. I just need to get the end position for my substring.

There are a few hundred instances of these strings.
Here are what typical strings look like:

// in this one I need to remove '_1_13.png'
top_fill_out_1_13.png

// in this one I need to remove '_10_7.png'
bot_fill_10_7.png

// in this one I need to remove _1_10.png
bot_fill_out_1_10.png

I start the substring at the beginning and then I need to end it at the second to last underscore ( _ ) so that I end up with:

top_fill_out
or
bot_fill
or
bot_fill_out

as my value.

Anyone got a good method or idea for this?

Thank you in advance for your help!

var sliceB;//will be my end substring
var setGradStyle = currGradStyle.substring(0,sliceB);
                                  
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Asked On
2009-10-09 at 14:07:40ID24800626
Tags

js

,

indexOf

,

lastIndexOf

,

slice

Topics

JavaScript

,

Scripting Languages

,

JScript

Participating Experts
3
Points
500
Comments
4

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Answers

 

by: cb1393Posted on 2009-10-09 at 14:49:01ID: 25539171

Something like the following, perhaps?

function getPngStr(pngStr){
	var imgName = pngStr.split("_")
	var sliceB = imgName.slice(0,imgName.length-2).join("_")
	return sliceB
}

                                              
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by: kadabaPosted on 2009-10-09 at 21:07:50ID: 25540799

you mean this... to be more clear

function getPngStr(currGradStyle){
        var imgName = currGradStyle.split("_");
        var setGradStyle = imgName.slice(0,imgName.length-2).join("_");
        return setGradStyle;
}

                                              
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by: xxli79Posted on 2009-10-12 at 07:21:32ID: 25551460

mine :)

function getPngStr(currGradStyle){
    return currGradStyle.replace(/(_[^_]+){2}$/g, "");
}

                                              
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by: the_heroPosted on 2009-10-12 at 10:23:56ID: 31639477

Thanks, Great job!

20120131-EE-VQP-002

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