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jQuery: Check if div with certain class name exists
...e is a truthy value at the first ([0]) index, then assume class exists.
Edit 04/10/2013: I've created a jsperf test case here.
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Difference between encoding and encryption
...data into another format using a scheme that is publicly available so that it can easily be reversed.
Encryption transforms data into another format in such a way that only specific individual(s) can reverse the transformation.
For Summary -
Encoding is for maintaining data usability and uses sch...
Copy constructor versus Clone()
In C#, what is the preferred way to add (deep) copy functionality to a class? Should one implement the copy constructor, or rather derive from ICloneable and implement the Clone() method?
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Set every cell in matrix to 0 if that row or column contains a 0
Given a NxN matrix with 0s and 1s. Set every row that contains a 0 to all 0 s and set every column that contains a 0 to all 0 s.
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find vs find_by vs where
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Use whichever one you feel suits your needs best.
The find method is usually used to retrieve a row by ID:
Model.find(1)
It's worth noting that find will throw an exception if the item is not found by the attribute that you supply. Use where (as des...
Go Error Handling Techniques [closed]
I'm just getting started with Go. My code is starting to have a lot of this:
11 Answers
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Wrapping a C library in Python: C, Cython or ctypes?
...I, only the functions and datatypes that are relevant to my case. As I see it, I have three choices:
12 Answers
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comparing sbt and Gradle [closed]
I am diving into Scala and noticed sbt. I have been quite happy with Gradle in java/groovy projects, and I know there's a scala plugin for Gradle.
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/bin/sh: pushd: not found
...shd command might do the chdir(2) call and then start a new shell, but ... it wouldn't be very usable.) pushd is a shell builtin, just like cd.
So, either change your script to start with #!/bin/bash or store the current working directory in a variable, do your work, then change back. Depends if yo...
Why does one use dependency injection?
...rying to understand dependency injections (DI), and once again I failed. It just seems silly. My code is never a mess; I hardly write virtual functions and interfaces (although I do once in a blue moon) and all my configuration is magically serialized into a class using json.net (sometimes using a...