摘要：``` 只能输入整数 oninput="value=value.replace(/[^\d]/g,'')" 限制小数点后3位 oninput="value=value.replace(/\D*(\d*)(\.?)(\d{0,3}).*/,'$1$2$3')" ``` 阅读全文

摘要：``` var crypto = require('crypto'); var fs = require('fs'); //从文件创建一个可读流 var stream = fs.createReadStream('./wu.jpg'); var fsHash = crypto.createHash('md5'); stream.on('data', function(d) { fsHash.upd 阅读全文

摘要：递归 var arr = [ {"id":1,"parent_id":0,"name":"Foods"}, {"id":2,"parent_id":1,"name":"Fruits"}, {"id":3,"parent_id":2,"name":"apple"}, {"id":4,"parent_i 阅读全文