Split string once in javascript?

Question

How can I split a string only once, i.e. make 1|Ceci n\'est pas une pipe: | Oui parse to: [\"1\", \"Ceci n\'est pas une pipe: | Oui\"]?

The

Answer 1

ES6 syntax allows a different approach:

function splitOnce(s, on) {
   [first, ...rest] = s.split(on)
   return [first, rest.length > 0? rest.join(on) : null]
}

Which also handles the eventuality of the string not having a | by returning null rather than an empty string, which is more explicit.

splitOnce("1|Ceci n'est pas une pipe: | Oui", "|")
>>> ["1", "Ceci n'est pas une pipe: | Oui"]

splitOnce("Celui-ci n'a pas de pipe symbol!", "|")
>>> ["Celui-ci n'a pas de pipe symbol!", null]

Pas de pipe? C'est null!

I added this reply primarily so I could make a pun on the pipe symbol, but also to show off es6 syntax - its amazing how many people still don't use it...