A few weeks ago, I have read this thread Is < faster than <=? about comparison operators in C. It was said that there is no difference in the performance between < and <= as they are interpreted as same/similar machine commands. At the s...
I'm trying to use the new (ES6) Map objects in order to represent a map between properties and a value. I have objects in a form similar to: {key1:value1_1,key2:value2_1},..... {key1:value1_N,key2:value2_N} I want to group them based on both...[Edit] The general question seems incredibly hard to solve. Here is a significantly restricted version of this question. How do I determine equality of functions? lets say we have function f() { // black box code. } function g() { // b...From: http://www.2ality.com/2011/12/strict-equality-exemptions.html JavaScript has two operators for determining whether two values are equal: The strict equality operator === only considers values equal that have the same type. The ...
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If I try something such as this: $(".foo") === $(".foo") // = false ... I get false. If I instead try this query, $(".foo").get(0) === $(".foo").get(0) // = true ... I get true. That's because: {a:myObject}...I understand that to compare two strings for equality, the interpreter has to iterate through both strings and compare each character. That would make the time complexity 0(n) where n is the length of the shortest string. However, comparing two nu...
I had been going through the ES6 assuming that it would be easy to switch to EcmaScript 2017. While going through, I got confused about this code function f (x, y = 7, z = 42) { return x + y + z } f(1) === 50 Which has ES5 equivalent functi...I need to compare two numeric values for equality in Javascript. The values may be NaN as well. I've come up with this code: if (val1 == val2 || isNaN(val1) && isNaN(val2)) ... which is working fine, but it looks bloated to me. I would...
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