`

犀牛书第五版读书笔记——Chapter 6. Statements

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1.javascript中的switch比java中的好用,不仅可以用来检查number,也可以直接用来匹配string

2.for/in语句
for (var prop in object) {
    alert(prop);
}

3.with的作用是把对象临时地置于scope chain的第一位,在执行完毕后则清除。with语句的性能比较差,如果没有充分的理由,最好少用
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