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Is there any way to git checkout previous branch?
I sort of want the equivalent of cd - for git. If I am in branch master and I checkout foo , I would love to be able to type something like git checkout - to go back to master , and be able to type it again to return to foo .
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Merge/flatten an array of arrays
...var merged = [].concat.apply([], arrays);
console.log(merged);
Using the apply method of concat will just take the second parameter as an array, so the last line is identical to this:
var merged2 = [].concat(["$6"], ["$12"], ["$25"], ["$25"], ["$18"], ["$22"], ["$10"]);
There is also ...
How to find where gem files are installed
I can finds gems that are installed using gem list , but it doesn't show me where the gems are installed.
10 Answers
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Creating Threads in python
...ss of Thread to make this work - take a look at the simple example I'm posting below to see how:
from threading import Thread
from time import sleep
def threaded_function(arg):
for i in range(arg):
print("running")
sleep(1)
if __name__ == "__main__":
thread = Thread(targe...
What are Vertex Array Objects?
I am just starting to learn OpenGL today from this tutorial: http://openglbook.com/the-book/
I got to chapter 2, where I draw a triangle, and I understand everything except VAOs (is this acronym OK?). The tutorial has this code:
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How do I check for nulls in an '==' operator overload without infinite recursion?
The following will cause infinite recursion on the == operator overload method
13 Answers
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Login failed for user 'IIS APPPOOL\ASP.NET v4.0'
...and IIS 7) and I need to migrate it to IIS 7 locally (at the moment works fine with CASSINI).
35 Answers
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T-SQL Cast versus Convert
...e CAST versus CONVERT ? Is there any performance issues related to choosing one versus the other? Is one closer to ANSI-SQL?
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Difference between `data` and `newtype` in Haskell
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While data declares a brand new data structure at runtime.
So the key point here is that the construct for the newtype is guaranteed to be erased at compile time.
Examples:
data Book = Book Int Int
newtype Book = Book (Int, Int)
Note how it has exactly the same representation as a (I...
How to use php serialize() and unserialize()
...ructure cannot be transported or stored or otherwise used outside of a running PHP script. If you want to persist such a complex data structure beyond a single run of a script, you need to serialize it. That just means to put the structure into a "lower common denominator" that can be handled by thi...