restrictOnce - nodef/extra-function GitHub Wiki

Restrict a function to be used only once.

Alternatives: restrict, restrictOnce, restrictBefore, restrictAfter.

function restrictOnce(x)
// x: a function

const xfunction = require('extra-function');


var count = 0;
var fn = xfunction.restrictOnce(x => ++count);
for (var i=0; i<10; ++i)
  fn(i);
count;
// → 1

References

• once: Underscore.js documentation
• once: Lodash documentation
• one-time package by Arnout Kazemier
• onetime package by Sindre Sorhus
• once package by Isaac Z. Schlueter