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Appending a line to a file only if it does not already exist
... plain string
https://linux.die.net/man/1/grep
Edit:
incorporated @cerin and @thijs-wouters suggestions.
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How to attribute a single commit to multiple developers?
...commit is attributed to a single developer. The rise of Agile Engineering, and specifically pair programming, has lead to a situation where two developers have made a significant contribution to the same task, a bug fix for example.
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How to hide the “back” button in UINavigationController?
...er use this:
[self.navigationItem setHidesBackButton:YES animated:YES];
And to restore it:
[self.navigationItem setHidesBackButton:NO animated:YES];
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[UPDATE]
Swift 3.0:
self.navigationItem.setHidesBackButton(true, animated:true)
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django import error - No module named core.management
... I see plenty of these errors around. I have tried everything I know to do and have yet to figure this out.
29 Answers
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Case-insensitive string comparison in C++ [closed]
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Boost includes a handy algorithm for this:
#include <boost/algorithm/string.hpp>
// Or, for fewer header dependencies:
//#include <boost/algorithm/string/predicate.hpp>
std::string str1 = "hello, world!";
std::string str2 = "HELL...
Is returning null bad design? [closed]
...ationale behind not returning null is that you do not have to check for it and hence your code does not need to follow a different path based on the return value. You might want to check out the Null Object Pattern which provides more information on this.
For example, if I were to define a method ...
What is “Linting”?
PHPLint , JSLint , and I recently came across "you can lint your JS code on the fly" while reading something about some IDE .
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Using async-await on .net 4
... lot from C# 5's async-await feature. But I'm not sure which version of VS and of the async runtime to use.
5 Answers
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How can I expand and collapse a using javascript?
...you've got two options here :
Use jQuery UI's accordion - its nice, easy and fast. See more info here
Or, if you still wanna do this by yourself, you could remove the fieldset (its not semantically right to use it for this anyway) and create a structure by yourself.
Here's how you do that. Creat...
Capturing touches on a subview outside the frame of its superview using hitTest:withEvent:
...superview EditView that takes up basically the entire application frame, and a subview MenuView which takes up only the bottom ~20%, and then MenuView contains its own subview ButtonView which actually resides outside of MenuView 's bounds (something like this: ButtonView.frame.origin.y = ...