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system(“pause”); - Why is it wrong?
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It's slow. It's platform dependent. It's insecure.
First: What it does. Calling "system" is literally like typing a command into the windows command prompt. There is a ton of setup and teardown for your application to make such a call - and the overhead is simply ridiculous.
What if a program ca...
Meaning of $? (dollar question mark) in shell scripts
...ho $? # echoes 0
false
echo $? # echoes 1
From the manual: (acessible by calling man bash in your shell)
$? Expands to the exit status of the most recently executed foreground pipeline.
By convention an exit status of 0 means success, and non-zero return status means failu...
log messages appearing twice with Python Logging
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You are calling configure_logging twice (maybe in the __init__ method of Boy) : getLogger will return the same object, but addHandler does not check if a similar handler has already been added to the logger.
Try tracing calls to th...
How much of a git sha is *generally* considered necessary to uniquely identify a change in a given c
...e time.
We should both increase the default abbrev that was unrealistically small, and add a way for people to set their own default per-project in the git config file.
core.abbrev
Set the length object names are abbreviated to.
If unspecified, many commands abbreviate to 7 hexdigits, ...
Qt events and signal/slots
...nveniently:
Since we reimplemented a virtual, our implementation automatically became encapsulated in our class. If Qt's designers had made keyPressEvent a signal, we would need to decide whether to inherit QPushButton or just externally connect to the signal. But that would be stupid, since in Qt...
Why use Abstract Base Classes in Python?
...lemented classes.
Long version
There is a contract between a class and its callers. The class promises to do certain things and have certain properties.
There are different levels to the contract.
At a very low level, the contract might include the name of a method or its number of parameters.
In a ...
How do I get the height and width of the Android Navigation Bar programmatically?
...navigation bar on the bottom of the screen is not easily removable in Android. It has been part of Android since 3.0 as a replacement for hardware buttons. Here is a picture:
...
iOS JavaScript bridge
... allowing complete communication between the two.
However, you can easily call from javascript custom-made URLs, like:
window.location = yourscheme://callfunction/parameter1/parameter2?parameter3=value
And intercept it from Objective-C with this:
- (BOOL)webView:(UIWebView*)webView shouldStartL...
Is it good style to explicitly return in Ruby?
...e, it's fine. Clearly if somewhere further down the code chain, something calling this is expecting a returned value, it's going to fail as it's not getting back what it expects.
The real question now is this: did anything really expect a returned value? Did this break something or not? Will it...
How do I include inline JavaScript in Haml?
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Haml did not add CDATA for me, nor did %script work for me if there were any irregular indentations in the js.
– agmin
Oct 24 '13 at 20:46
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