regular expression

[gaurav v bagga]

hi all,

i am finding it difficult to find a regular expression for following
situation(replace)

a b c d => a,b,c d
a b c => a,b c

i'll apreciate if anyone helps me with this...

regards
gaurav

 

[Janwillem Borleffs]

i am finding it difficult to find a regular expression for following
situation(replace)

a b c d => a,b,c d
a b c => a,b c

i'll apreciate if anyone helps me with this...

alert("a b c".split(' ').join(',').replace(/(,)([^,]+)$/, ' $2'));


JW

 

[Evertjan.]

gaurav v bagga wrote on 20 jan 2007 in comp.lang.javascript:

i am finding it difficult to find a regular expression for following
situation(replace)

a b c d => a,b,c d
a b c => a,b c

i'll apreciate if anyone helps me with this...

You will have to explain better.

Are a b c and d words, single letters, numbers?
Do you mean any whitespave with your space,
and replace all with a , but the last one??

Try:

t = t.replace(/\s+/g,',').replace(/,([^,]+)$/,' $1')

 

[Janwillem Borleffs]

alert("a b c".split(' ').join(',').replace(/(,)([^,]+)$/, ' $2'));

Alternative, using look ahead assertion:

alert("a b c".split(/\s(?![^\s]+$)/).join(', '));


JW

 

[gaurav v bagga]

hi,

thanks all for help it was very nice.

regards
gaurav