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
854 B
JavaScript
45 lines
854 B
JavaScript
/**
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* Throttle decorator
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* @param {Function} fn
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* @param {Number} freq
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* @return {Function}
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*/
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function throttle(fn, freq) {
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let timestamp = 0;
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let threshold = 1000 / freq;
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let lastArgs;
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let timer;
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const invoke = (args, now = Date.now()) => {
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timestamp = now;
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lastArgs = null;
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if (timer) {
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clearTimeout(timer);
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timer = null;
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}
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fn(...args);
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};
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const throttled = (...args) => {
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const now = Date.now();
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const passed = now - timestamp;
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if (passed >= threshold) {
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invoke(args, now);
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} else {
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lastArgs = args;
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if (!timer) {
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timer = setTimeout(() => {
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timer = null;
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invoke(lastArgs);
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}, threshold - passed);
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}
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}
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};
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const flush = () => lastArgs && invoke(lastArgs);
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return [throttled, flush];
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}
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export default throttle;
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