flying-hero
96f6318101
新增: - backend/venv/ - Python 虚拟环境 - backend/start.sh - 启动脚本（使用虚拟环境） - backend/requirements.txt - 依赖列表 - .gitignore - 忽略虚拟环境和缓存文件 说明: - 每个项目使用独立虚拟环境 - 避免依赖冲突 - 启动脚本自动创建和激活虚拟环境
32 lines
800 B
JavaScript
32 lines
800 B
JavaScript
'use strict';
|
|
|
|
var $TypeError = require('es-errors/type');
|
|
var isFinite = require('math-intrinsics/isFinite');
|
|
var isNaN = require('math-intrinsics/isNaN');
|
|
|
|
// https://262.ecma-international.org/12.0/#sec-numeric-types-number-add
|
|
|
|
module.exports = function NumberAdd(x, y) {
|
|
if (typeof x !== 'number' || typeof y !== 'number') {
|
|
throw new $TypeError('Assertion failed: `x` and `y` arguments must be Numbers');
|
|
}
|
|
|
|
if (isNaN(x) || isNaN(y) || (x === Infinity && y === -Infinity) || (x === -Infinity && y === Infinity)) {
|
|
return NaN;
|
|
}
|
|
|
|
if (!isFinite(x)) {
|
|
return x;
|
|
}
|
|
if (!isFinite(y)) {
|
|
return y;
|
|
}
|
|
|
|
if (x === y && x === 0) { // both zeroes
|
|
return Infinity / x === -Infinity && Infinity / y === -Infinity ? -0 : +0;
|
|
}
|
|
|
|
// shortcut for the actual spec mechanics
|
|
return x + y;
|
|
};
|