Last number in string

[aliensite]

How do I get expression to output "24"?

<script>
var str = "dog3cat24z"
var re = /\D/g;
var lastNum = str.replace(re, "") // lastNum should be 24
document.write(lastNum)
</script>

Thanks

[Evertjan.]

aliensite wrote on 21 nov 2005 in comp.lang.javascript:

How do I get expression to output "24"?

<script>
var str = "dog3cat24z"
var re = /\D/g;
var lastNum = str.replace(re, "") // lastNum should be 24
document.write(lastNum)
</script>

str = "dog3cat24z"

var lastNum = str.replace(/.*?(\d+)[^\d]*$/,'$1')

alert(lastNum)
--
Evertjan.
The Netherlands.
(Replace all crosses with dots in my emailaddress)

[Dr John Stockton]

JRS: In article <11**********************@g44g2000cwa.googlegroups .com>
, dated Mon, 21 Nov 2005 14:36:08, seen in news:comp.lang.javascript,
aliensite <al*******@excite.com> posted :

How do I get expression to output "24"?

<script>
var str = "dog3cat24z"
var re = /\D/g;
var lastNum = str.replace(re, "") // lastNum should be 24
document.write(lastNum)
</script>

If there is always a non-digit before the last number - and you can
assure that by prepending one -
lastNum = str.replace(/.*\D(\d+)\D*/, "$1")

This might work without that condition, but in fewer browsers -

lastNum = str.replace(/.*?(\d+)\D*/, "$1")

Also

lastNum = str.split(/\D+/).reverse()[0]

--
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