Is there a nice way (except using JS exceptions) to stop forEach loop in ES6 Map object (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/forEach )
From example provided on MDN - is there a way to stop enumeration on 'bar' (skip bar):
function logMapElements(value, key, map) {
console.log(`m[${key}] = ${value}`);
}
new Map([['foo', 3], ['bar', {}], ['baz', undefined]]).forEach(logMapElements);
For the people who suggest to close this question: yes, it is similar to the questions about Array.prototype.forEach.
But at the same time is different: most of the suggested answers won't work with ES6 set and map. Only throwing the exception will work, but I ask for some other ways
There is no good reason to use forEach
any more in ES6. You should use iterators and for … of
loops from which you can ordinarily break
:
const m = new Map([['foo', 3], ['bar', {}], ['baz', undefined]]);
for (let [key, value] of m) {
console.log(`m[${key}] = ${value}`);
}
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