CodePudding user response:

 (function (arr) {
Var r=[]; 
for (var i=0; i{
R=(function (a, b) {
If (a. ength==0) 
{
return b; 
} else {
Var c=a, r=[]; 
For (var x=0; XFor (var y=0; YR.p ush (c + b [y] [x]). 
} 
} 
Return r 
} 
}) (r, arr [I]) 
} 
The console. The log (r.j oin (', ')) 
Return r 
}) ([[' a ', 'b'], [' n ', 'm' and 'x', 'y'], [' 0 ', '1']]) 

CodePudding user response:

 const arr=[[' a ', 'b'], [' m ', 'n'], [0, 1]] 

The function doArr (arr) {
Let the result=arr. The shift () 
While (arr. Length) {
Const other=arr. The shift () 
Const newResult=[] 
Result. The forEach (item=& gt; {
Other. ForEach (_item=& gt; {
NewResult. Push (item + '+ _item) 
}) 
}) 
Result=newResult [...] 
} 
Return the result 
} 
Const result=doArr (arr) 
The console. The log (result) 

 arr for [[' a ', 'b'], [' m ', 'n'], [0, 1]] 
///"am0", "am1", "an0", "an1", "bm0", "bm1", "bn0", "bn1"] 
Arr for arr=[[' a ', 'b'], [' m ', 'n'], [0, 1], [3, 4]] 
///"am03 am04", ""," am13 ", "am14," "an03", "an04", "an13", "an14," "bm03", "bm04", "bm13," "bm14", "bn03", "bn04", "bn13", "bn14"] 

CodePudding user response: