How do you use bind for partial application in JavaScript?
const add5 = add.bind(null, 5) creates a function where the first argument is always 5. When called with (3, 2), it calls add(5, 3, 2). This is partial application.
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More FAQs in Practical Use Cases for call, apply, and bind
Use call: Array.prototype.slice.call(arguments) borrows slice to convert array-like objects to arrays. Array.prototype.forEach.call(nodeList, fn) borrows forEach for NodeLists.
Use bind: setTimeout(obj.method.bind(obj), 1000). Or use an arrow wrapper: setTimeout(() => obj.method(), 1000). bind permanently sets this for the returned function.
Math.max.apply(null, [1, 2, 3]) returns 3. In modern JS, use spread: Math.max(...[1, 2, 3]). Both work, but spread is more readable.
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