js将一位数组分割成每三个一组

var data = ["法国","澳大利亚","智利","新西兰","西班牙","加拿大","阿根廷","美国","0","国产","波多黎各","英国","比利时","德国","意大利","意大利",];
var result = [];
for(var i=0,len=data.length;i<len;i+=3){
    result.push(data.slice(i,i+3));
}

public slice(list:any[], length:number):any[][]{
    let result:any[][] = [];
    for(let i:number=0,len:number=list.length;i<len;i+=length){
        result.push(list.slice(i,i+length));
    }
    return result;
}