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Rails: create on has_one association
...previous shop. For instance if you run @user.create_shop(params[:shop_one_info]) it will create shop_one, BUT if you run @user.create_shop(params[:shop_two_info]) that it will delete the first shop and create the second one.
– ecoding5
May 6 '16 at 17:08
...
Append a NumPy array to a NumPy array
...sage says it all: NumPy arrays do not have an append() method. There's a free function numpy.append() however:
numpy.append(M, a)
This will create a new array instead of mutating M in place. Note that using numpy.append() involves copying both arrays. You will get better performing code if yo...
Why do we need private subnet in VPC?
...s to a limited audience without needing to use something like an ELB. This frees you from the need to set up a NAT instance or NAT gateway. And since you need half as many subnets, you could choose to use a smaller CIDR allocation for your VPC or you could make bigger subnets with the same size VPC....
angularjs directive call function specified in attribute and pass an argument to it
...
Just to add some info to the other answers - using & is a good way if you need an isolated scope.
The main downside of marko's solution is that it forces you to create an isolated scope on an element, but you can only have one of those ...
How to play a notification sound on websites?
....
Audio-sprites support included.
No dependecies (jQuery not required).
25 free sounds included.
Set up plugin:
// set up config
ion.sound({
sounds: [
{
name: "my_cool_sound"
},
{
name: "notify_sound",
volume: 0.2
},
...
What is the purpose of double curly braces in React's JSX syntax?
... Great, thank you! Unfortunately I'm out in California these days but feel free to drop by the #reactjs IRC room on freenode and I'd be happy to answer questions.
– Sophie Alpert
Mar 27 '14 at 4:39
...
Why would you use an ivar?
...se you believe wasting CPU time is totally acceptable, after all "it's for free", then what about server hosting costs caused by power consumption? What about battery runtime of mobile devices? If you would write the same mobile app twice (e.g. an own mobile web browser), once a version where all cl...
C++ Returning reference to local variable
...
}
The second version does work because the variable is allocated on the free store, which is not bound to the lifetime of the function call. However, you are responsible for deleteing the allocated int.
int* func2()
{
int* p;
p = new int;
*p = 1;
return p;
}
int main()
{
int...
Contains method for a slice
...nt to add an element. Just try it, and if you encounter any problems, feel free to ask. You can also use Mostafa's solution if that's easier for you to understand (unless you have huge amounts of data).
– tux21b
May 7 '12 at 17:43
...
Working with README.md on github.com [closed]
...down as you edit it. See https://atom.io/
I'm not sure whether it will be free (as in beer) in the long term.
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