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Multiple split … is it possible

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Apr 15.2008

I have not been able to figure out how to do a multiple split.

For example, given:
str = ‘100 + (xvar*3)’;
strArr = str.split(/^w+|^d+|s+/g);
alert(strArr.join(“n”);

I was expecting to see:
100
+
(
xvar
*
3
)

But instead, I get:

+(xvar*3)
which loses the first number altogether and only removes spaces thereafter.

I also tried:
strArr = str.split(/w+|d+|s+/g);
but the display was even less (lost all words and numbers):

+(
*
)

Two questions:
1. Can I split a string on multiple conditions (words, numbers and symbols)?
2. Is there another, or better, way to do it … or is it impossible with a split?

It is my first step in an attempt at trying to convert a statement from ‘infix’ to ‘postfix’.
I just can’t get past the first step
Thanks for any ideas.

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JavaScript

3 Comments(s) ↴

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@mrhooApr 15.2008 — parenthetise the items you are splitting on to include them in the array-

and use W for punctuation and space characters

[CODE]var str = '100 + (xvar*3)';
strArr = str.split(/(w+|d+|W+)/);
alert(strArr.join("n"));[/CODE]

returned value:

100

  • + (


    • xvar

    *

    3

    )

    If you want each nonword character on its own line, use W instead of W+
    Copy linkTweet thisAlerts:
    @NedalsApr 15.2008 — <i>
    </i>var str = '100+(xvar*3)';
    strArr = str.match(/(w+|d+|W)/g);
    alert(strArr.join("n"));

    Note: I cleared the whitespace before the match.
    Copy linkTweet thisAlerts:
    @JMRKERauthorApr 15.2008 — Thank you 'mrhoo' and 'Nedals'.

    I appreciated the information.
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