//2D array
vararr = [
[1,2,3],
[2,3,4],
[5,6,7]
]
I'd like to sum up each array element of a two-dimensional array like ↓.
[
[6],
[9],
[18]
]
vararr1=arr.map(function(val){
val.reduce(function(a,b){return a+b})
})
I thought it would match the answer you asked in
The result is [null, null, null].
If anyone understands, please reply.
If you add a return to the function in the map, it will work properly.
vararr1=arr.map(function(val){
return value.reduce(function(a,b){return a+b})
})
It worked.
arr.map(function(val){
return val.reduce (function(a,b) {return a+b;})
})
Then I did a great job.
arr.map(function(val){return)
val.reduce (function(a,b) {return a+b;})
})
return would not work.
Thank you
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