JS查询一组10位数字的前8位或者前6位是否匹配

Question

想实现一个功能，就是当用户在input输入10位数字后点击查询按钮后，去匹配json数据中的预输入值，并根据不同的信息反馈不同的查询结果。

然而json的预输入值只有8位或者6位（相对应10位数字的前8位或者前6位，匹配优先级是先8位后6位）。请教这个查询判断应该如何去做？谢谢！

json格式：

{"id":"123456","info":"这是普通用户"},
{"id":"87654321","info":"这是高级用户"}
{"id":"876543","info":"这是尊享用户"}

例如用户输入的是1234567890，json数据中的预输入值有123456，则匹配这个预输入值的信息，如果用户输入的是0987654321，json数据中的预输入值有098765和09876543两个时，则匹配09876543的预输入值的信息。

PS：自己钻进了模糊查询的死胡同，有点绕不出来。。。

Answer 1

var jsons = [&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {"id":"123456","info":"这是普通用户"},&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {"id":"876543","info":"这是尊享用户"},&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {"id":"87654321","info":"这是高级用户"},&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {"id":"87654311","info":"这是尊享用户"},&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;]&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; function f(jsons,num) {&nbsp; &nbsp; &nbsp; &nbsp; var num8 = num.substr(0,8);&nbsp; &nbsp; &nbsp; &nbsp; var num6 = num.substr(0,6);&nbsp; &nbsp; &nbsp; &nbsp; var result6 = '';&nbsp; &nbsp; &nbsp; &nbsp; var result8 = '';&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; for(var i = 0,len = jsons.length; i < len;i++) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; var id = jsons[i].id;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if(id == num8) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; result8 = jsons[i];&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; break;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if(id == num6) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; result6 = jsons[i];&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;}&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return result8 ? result8 : result6;&nbsp;&nbsp; &nbsp; }