# Put vector of vector into vector of vector without for loop
**URL:** https://discourse.julialang.org/t/put-vector-of-vector-into-vector-of-vector-without-for-loop/16826
**Category:** General Usage
**Created:** [October 26, 2018, 2:49pm UTC](https://discourse.julialang.org/t/put-vector-of-vector-into-vector-of-vector-without-for-loop/16826 "2018-10-26T14:49:06Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@zsoerenm](https://discourse.julialang.org/u/zsoerenm)
#### Post date: [October 26, 2018, 2:49pm UTC](https://discourse.julialang.org/t/put-vector-of-vector-into-vector-of-vector-without-for-loop/16826/1 "2018-10-26T14:49:06Z")
Consider the following minimal example:
```julia
A = [Vector{Int}(undef, 5) for i = 1:4]
a = [zeros(Int, 2) for i = 1:4]
```
I’d like to put `a` into the first 2 inner indices of `A` without a for loop. Is that possible?
Something like:
```julia
A[:][1:2] = a
```
but this errors with:
```julia
ERROR: DimensionMismatch("tried to assign 4 elements to 2 destinations")
```
---
### Author:  [@foobar\_lv2](https://discourse.julialang.org/u/foobar_lv2)
#### Post date: [October 26, 2018, 2:58pm UTC](https://discourse.julialang.org/t/put-vector-of-vector-into-vector-of-vector-without-for-loop/16826/2 "2018-10-26T14:58:26Z")
```julia
julia> A[1:2] .= a[1:2]; A
4-element Array{Array{Int64,1},1}:
[0, 0]
[0, 0]
[1, 2, 3, 4, 5]
[1, 2, 3, 4, 6]
```
---
### Author:  [@zsoerenm](https://discourse.julialang.org/u/zsoerenm)
#### Post date: [October 26, 2018, 3:03pm UTC](https://discourse.julialang.org/t/put-vector-of-vector-into-vector-of-vector-without-for-loop/16826/3 "2018-10-26T15:03:46Z")
Thank you, but it is not exactly what I wanted.
Consider `A` and `a` like
```julia
A = [ones(4) for i = 1:4]
4-element Array{Array{Float64,1},1}:
[1.0, 1.0, 1.0, 1.0]
[1.0, 1.0, 1.0, 1.0]
[1.0, 1.0, 1.0, 1.0]
[1.0, 1.0, 1.0, 1.0]
julia> a = [zeros(2) for i = 1:4]
4-element Array{Array{Float64,1},1}:
[0.0, 0.0]
[0.0, 0.0]
[0.0, 0.0]
[0.0, 0.0]
```
The output I like would be:
```julia
4-element Array{Array{Float64,1},1}:
[0.0, 0.0, 1.0, 1.0]
[0.0, 0.0, 1.0, 1.0]
[0.0, 0.0, 1.0, 1.0]
[0.0, 0.0, 1.0, 1.0]
```
---
### Author:  [@oliver](https://discourse.julialang.org/u/oliver)
#### Post date: [October 26, 2018, 3:08pm UTC](https://discourse.julialang.org/t/put-vector-of-vector-into-vector-of-vector-without-for-loop/16826/4 "2018-10-26T15:08:16Z")
> [@foobar\_lv2](#):
>
> .=
I get,
`ERROR: UndefVarError: .= not defined`
---
### Author:  [@mbauman](https://discourse.julialang.org/u/mbauman)
#### Post date: [October 26, 2018, 3:10pm UTC](https://discourse.julialang.org/t/put-vector-of-vector-into-vector-of-vector-without-for-loop/16826/5 "2018-10-26T15:10:33Z")
Are you still using Julia 0.4? I highly recommend you upgrade.