UI for Zipcoin Blue

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onetime

Ensure a function is only called once

When called multiple times it will return the return value from the first call.

Unlike the module once, this one isn't naughty extending Function.prototype.

Install

$ npm install --save onetime

let i = 0;

const foo = onetime(() => i++);

foo(); //=> 0
foo(); //=> 0
foo(); //=> 0

const foo = onetime(() => {}, {throw: true});

foo();

foo();
//=> Error: Function `foo` can only be called once

Returns a function that only calls fn once.

Type: Function

Function that should only be called once.

Type: Object

Type: boolean
Default: false

Throw an error when called more than once.