Invoke a function only once. Useful, depending on situations and especially with initializion.
npm install --save invoked-once
const invokedOnce = require('invoked-once')
// a:
let j = 1
const once = invokedOnce(() => ++j)
once() // 2
once() // 2
// b:
let once = invokeOnce(() => console.log('Invoked!'))
once() //=> Invoked!
once() //=> undefinedMake sure you npm install to fetch tape:
node test.js
TAP version 13
# invokedOnce
ok 1 should be equal
ok 2 should be equal
ok 3 should be equal
ok 4 should throw
ok 5 should throw
# should invoke the function once
ok 6 should be equivalent
1..6
# tests 6
# pass 6
# ok
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