lib/string.js
function camelCase(str) {
    return words(str).reduce((result, word, idx) => {
        return result + (idx ? (isUpperCase(word) ? word : capitalize(word)) : lowerCase(word));
    }, '');
}
function camelCase(str) {
    return words(str).reduce((result, word, idx) => {
        return result + (idx ? (isUpperCase(word) ? word : capitalize(word)) : lowerCase(word));
    }, '');
}
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小驼峰
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