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Rails 4: List of available datatypes
...SQL, you can also take advantage of these:
:hstore
:json
:jsonb
:array
:cidr_address
:ip_address
:mac_address
They are stored as strings if you run your app with a not-PostgreSQL database.
Edit, 2016-Sep-19:
There's a lot more postgres specific datatypes in Rails 4 and even more in Rails 5.
...
Auto column width in EPPlus
...s[Worksheet.Dimension.Address].AutoFitColumns();
Please note you need to call this method after filling the worksheet.
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method overloading vs optional parameter in C# 4.0 [duplicate]
... the number of parameters.
For example say you want a method foo to be be called/used like so, foo(), foo(1), foo(1,2), foo(1,2, "hello"). With method overloading you would implement the solution like this,
///Base foo method
public void DoFoo(int a, long b, string c)
{
//Do something
}
/// ...
Difference between git checkout --track origin/branch and git checkout -b branch origin/branch
...ch is started off a remote-tracking branch, Git sets up the branch (specifically the branch.<name>.remote and branch.<name>.merge configuration entries) so that git pull will appropriately merge from the remote-tracking branch.
This behavior may be changed via the global branch.autoset...
do N times (declarative syntax)
... based on Array.forEach, without any library, just native vanilla.
To basically call something() 3 times, use:
[1,2,3].forEach(function(i) {
something();
});
considering the following function:
function something(){ console.log('something') }
The outpout will be
something
something
someth...
What does if __name__ == “__main__”: do?
... explore how imports and scripts work. Suppose the following is in a file called foo.py.
# Suppose this is foo.py.
print("before import")
import math
print("before functionA")
def functionA():
print("Function A")
print("before functionB")
def functionB():
print("Function B {}".format(mat...
Is there any particular difference between intval and casting to int - `(int) X`?
...
I did benchmarking on ideone - (int) typecast is faster x 2 ! (int):ideone.com/QggNGc , intval():ideone.com/6Y8mPN
– jave.web
Aug 12 '14 at 18:32
...
How to return a string value from a Bash function
... @Evi1M4chine, um...no, you can't. You can set a global variable and call it "return", as I see you do in your scripts. But then that is by convention, NOT actually tied programmatically to the execution of your code. "clearly a better way"? Um, no. Command substitution is far more explici...
Mutex example / tutorial? [closed]
... his wife :) There's no queue system as such. When the person finishes his call, comes out of the booth and leaves the door handle, the next person to get hold of the door handle will be allowed to use the phone.
A thread is : Each person
The mutex is : The door handle
The lock is : Th...
How to use R's ellipsis feature when writing your own function?
...me.
For use of unevaluated ... argument look at write.csv code where match.call is used.
As you write in comment result in Dirk answer is not a list of lists. Is a list of length 4, which elements are language type. First object is a symbol - list, second is expression 1:10 and so on. That explain w...