80 lines
1.9 KiB
TypeScript
80 lines
1.9 KiB
TypeScript
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/**
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* 字符串工具函数库
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* 提供对字符串常见处理的常用工具函数。
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*/
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/**
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* 检查字符串是否为空或仅包含空格
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*/
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export const isEmptyOrWhitespace = (str: string): boolean => {
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return !str || str.trim().length === 0;
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};
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/**
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* 将字符串的首字母大写
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*/
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export const capitalize = (str: string): string => {
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if (!str) return '';
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return str.charAt(0).toUpperCase() + str.slice(1);
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};
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/**
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* 转换成驼峰命名法 (camelCase)
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*/
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export const toCamelCase = (str: string): string => {
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return str
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.toLowerCase()
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.replace(/[-_ ]+(\w)/g, (_, group: string) => group.toUpperCase());
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};
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/**
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* 转换成蛇形命名法 (snake_case)
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*/
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export const toSnakeCase = (str: string): string => {
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return str
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.replace(/[A-Z]/g, letter => `_${letter.toLowerCase()}`)
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.replace(/[\s\-]+/g, '_')
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.replace(/^_/, '')
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.toLowerCase();
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};
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/**
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* 转换成烤串命名法 (kebab-case)
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*/
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export const toKebabCase = (str: string): string => {
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return str
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.replace(/[A-Z]/g, letter => `-${letter.toLowerCase()}`)
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.replace(/[\s_]+/g, '-')
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.replace(/^-/, '')
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.toLowerCase();
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};
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/**
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* 截断字符串到指定长度，超出部分使用 "..." 表示
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*/
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export const truncate = (str: string, length: number): string => {
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if (str.length <= length) return str;
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return str.slice(0, length) + '...';
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};
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/**
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* 统计字符串中每个字符的出现次数
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*/
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export const charFrequency = (str: string): Record<string, number> => {
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return str.split('').reduce((acc: Record<string, number>, char: string) => {
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acc[char] = (acc[char] || 0) + 1;
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return acc;
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}, {});
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};
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/**
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* 检查字符串是否是有效的 JSON
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*/
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export const isValidJSON = (str: string): boolean => {
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try {
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JSON.parse(str);
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return true;
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} catch {
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return false;
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}
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};
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