Integer math in JavaScript | James Darpinian

You may know that all numbers in JavaScript are 64 bit double-precision floating point values. This is sometimes convenient and it works pretty well as a default for novice programmers, who are often confused by integer math, and rightfully so when 1 / 2 = 0. Unfortunately, it makes things slow. Doubles take a lot of memory and floating point math is slower than integer math on CPUs. It's also inc

[tmatsuu]

JavaScriptでint32演算をしたい場合は末尾に `| 0` を。uint32演算をしたい場合は末尾に `>>> 0` を。え。

[jay-es]

JS で整数を扱う場合は手動で `| 0`（符号なしの場合は `>>> 0`）をつけることで内部の変換をスキップして高速化できる。配列を使う場合は型付き配列を使う