将第一个CSV字符串参数，按纵横比分类。 测试数据："120×240 ,120×600 ,,160×600 ,200×200 ,250×250 ,300×250 ,336×280 ,468×60 ,728×90 ,970×90 ,,120×240 ,180×150 ,234×60 ,300×600 ,,160×600 ,250×250 ,300×250 ,336×280 ,468×60 ,640×90 ,728×90 ,760×90 ,950×90 , ,120×240 ,250×300 ,300×100,660×90 ,250×180,600×90,650×90 ,360×300,500×200,,1000×90 ,960×90 ,300×250 ,220×120 ,300×50 ,…

analytics_specs.js

/**
 * 
 * 将第一个CSV字符串参数，按纵横比分类
 * usage: analytics_specs("800*1600, 400*800, 800*2000", "x", ",")
 */

function analytics_specs( string, a, b ) {

    a = a || '×';
    b = b || ',';

    var array = string.split(b);
	
    //去掉空格
    for(var i in array){
        array[i] = array[i].replace(/\s+/,'')
    }

    //分长宽比储存
    var stored = '';
    var result = {};
    if(this == window) this.get_ratio = analytics_specs.prototype.get_ratio;
    for(var i in array){
        //去重
        if( stored.match(new RegExp("(^|,)"+array[i]+"($|,)")) ) continue;
        stored += array[i]+",";

        //按比例储存
        var s = array[i].split(a);
        var r = (s[0]/s[1]).toString();
        r = this.get_ratio(r);
        if( r in result ) {
            result[r].push(array[i]);
        } else { 
            result[r] = [array[i]];
        }
    }

    for(var i in result){
        var s = result[i];
        s.sort(function(v1, v2){
            return v1.split(a)[0] > v2.split(a)[1];
        })
        result[i] = s;
    }

    for(var i in result){
        console.log( i );
        for(var j in result[i]){
            console.log( result[i][j] );
        }
    }


    return result;
}

analytics_specs.prototype.get_ratio = function ( r ) {
    r = parseFloat(r);
    if( r <= 1/4 ) return '0.25';
    else if( r < 3/4 ) return '0.5';
    else if( r < 4/3 ) return '1';
    else if( r < 4/1 ) return '2';
    else if( r >= 4/1 ) return '4';
}