Question

I have this string 1,2,3,4,5

and say i remove 1 then it becomes ,2,3,4,5 or 1,2,,4,5

how do I remove “1,” or any number from the list and replace those extra commas and also keep in mind the last number “5” doesnt have a comma.

I can use the string replace javascript function , I am more concerned with the last number

example if i remove 5
it should show as 1,2,3,4

Answer 1

theString.replace(/«the number»,?|,«the number»$/, '')

>>> "1,2,3,4,5".replace(/1,?|,1$/, '')
"2,3,4,5"
>>> "1,2,3,4,5".replace(/2,?|,2$/, '')
"1,3,4,5"
>>> "1,2,3,4,5".replace(/5,?|,5$/, '')
"1,2,3,4"

Or treat the string as an array, with

theString.split(/,/).filter(function(x){return x!="«the number»";}).join(",")

>>> "1,2,3,4,5".split(/,/).filter(function(x){return x!="1";}).join(",")
"2,3,4,5"
>>> "1,2,3,4,5".split(/,/).filter(function(x){return x!="2";}).join(",")
"1,3,4,5"
>>> "1,2,3,4,5".split(/,/).filter(function(x){return x!="5";}).join(",")
"1,2,3,4"