如何新建一个有重复元素的数组

Question

类似['a','b','c','d','e','a','b','c','a','b','c','a','b','c']这样的有没有高级点的写法

Answer 1

functiongetArr($count){
$str='abc';
$arr=array();
for($i=0;$i<$count;$i++)
{
$rand=rand(0,2);
$arr[]=$str[$rand];
}
}$count为你想要新建的数组的个数，主要利用能通过下标获取字符串的某个字符
                            

Answer 2

functionrepeatArr(arr,len,start){
varret=[];
for(vari=start||0;iret.push(arr[i%arr.length]);
}
returnret;
}
repeatArr('abcde'.split(''),10);
//["a","b","c","d","e","a","b","c","d","e","a","b","c","d"]
functionrepeatArr(arr,repeats){
varret=[];
for(vari=0;ifor(varj=repeats[i][0];jret.push(arr[j%arr.length]);
}
}
returnret;
}
repeatArr('abcde'.split(''),[[0,5],[0,3],[0,3]]);
//["a","b","c","d","e","a","b","c","a","b","c"]