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
28 lines
760 B
JavaScript
28 lines
760 B
JavaScript
'use strict';
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var callBound = require('call-bound');
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var $TypeError = require('es-errors/type');
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var isInteger = require('math-intrinsics/isInteger');
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var StringToCodePoints = require('./StringToCodePoints');
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var $indexOf = callBound('String.prototype.indexOf');
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// https://262.ecma-international.org/13.0/#sec-getstringindex
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module.exports = function GetStringIndex(S, e) {
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if (typeof S !== 'string') {
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throw new $TypeError('Assertion failed: `S` must be a String');
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}
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if (!isInteger(e) || e < 0) {
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throw new $TypeError('Assertion failed: `e` must be a non-negative integer');
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}
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if (S === '') {
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return 0;
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}
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var codepoints = StringToCodePoints(S);
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var eUTF = e >= codepoints.length ? S.length : $indexOf(S, codepoints[e]);
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return eUTF;
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};
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