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
45 lines
1.1 KiB
JavaScript
45 lines
1.1 KiB
JavaScript
'use strict';
|
|
const mimicFn = require('mimic-fn');
|
|
|
|
const calledFunctions = new WeakMap();
|
|
|
|
const onetime = (function_, options = {}) => {
|
|
if (typeof function_ !== 'function') {
|
|
throw new TypeError('Expected a function');
|
|
}
|
|
|
|
let returnValue;
|
|
let callCount = 0;
|
|
const functionName = function_.displayName || function_.name || '<anonymous>';
|
|
|
|
const onetime = function (...arguments_) {
|
|
calledFunctions.set(onetime, ++callCount);
|
|
|
|
if (callCount === 1) {
|
|
returnValue = function_.apply(this, arguments_);
|
|
function_ = null;
|
|
} else if (options.throw === true) {
|
|
throw new Error(`Function \`${functionName}\` can only be called once`);
|
|
}
|
|
|
|
return returnValue;
|
|
};
|
|
|
|
mimicFn(onetime, function_);
|
|
calledFunctions.set(onetime, callCount);
|
|
|
|
return onetime;
|
|
};
|
|
|
|
module.exports = onetime;
|
|
// TODO: Remove this for the next major release
|
|
module.exports.default = onetime;
|
|
|
|
module.exports.callCount = function_ => {
|
|
if (!calledFunctions.has(function_)) {
|
|
throw new Error(`The given function \`${function_.name}\` is not wrapped by the \`onetime\` package`);
|
|
}
|
|
|
|
return calledFunctions.get(function_);
|
|
};
|