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Object.constructor object.constructor Object.create() Object.create(proto); Object.create(proto, descriptors) Object.defineProperties() Object.defineP 阅读全文
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String.charAt()/String.charCodeAt() ; n:The index of the character that should be returned from string. String.concat() String.fromCharCode() ; c1, c2 阅读全文
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Array.every() ; ; Array.concat() Array.indexOf() /Array.lastIndexOf() ; js ['a','b','c'].indexOf('b') // = 1 ['a','b','c'].indexOf('d') // = 1 ['a','b 阅读全文