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PHP Error handling: die() Vs trigger_error() Vs throw Exception
...rst one should never be used in production code, since it's transporting information irrelevant to end-users (a user can't do anything about "Cannot connect to database").
You throw Exceptions if you know that at a certain critical code point, your application can fail and you want your code to rec...
How can I list all collections in the MongoDB shell?
In the MongoDB shell, how do I list all collections for the current database that I'm using?
22 Answers
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How do I list all versions of a gem available at a remote site?
...rhc" is a regex, so if you only want to look at that one, you could search for gem list ^rhc$ and the "--remote" and "--all" flags can be abbreviated and combined for gem list ^rhc$ -ra
– Joshua Cheek
Feb 5 '12 at 4:19
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How does “make” app know default target to build if no target is specified?
...he GNU Make Manual covers all this stuff, and is a surprisingly easy and informative read.
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Switching to landscape mode in Android Emulator
...portrait and vice versa.
left-ctrl+F11on Windows 7.
ctrl+F11on Linux.
For Mac users, you only need to use the fn key if the setting "Use all F1, F2 etc. keys as function keys" (under System Preferences -> Keyboard) is checked.
left-ctrl+F11on Windows 7
It works fine in Windows 7 for andro...
gdb split view with code
...n gdb and somehow I found a new feature I've never seen or even heard of before, a split view where I can see and browse the code in addition to giving commands:
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How can I print literal curly-brace characters in python string and also use .format on it?
... the {{ and }}:
>>> x = " {{ Hello }} {0} "
>>> print(x.format(42))
' { Hello } 42 '
Here's the relevant part of the Python documentation for format string syntax:
Format strings contain “replacement fields” surrounded by curly braces {}. Anything that is not contained i...
Is there a unique Android device ID?
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Settings.Secure#ANDROID_ID returns the Android ID as an unique for each user 64-bit hex string.
import android.provider.Settings.Secure;
private String android_id = Secure.getString(getContext().getContentResolver(),
Secure.ANDROID...
System.IO.Packaging
... You don't even need a user comment. If you look at the docs for any of the actual methods/objects/etc. in the namespace, they all say "Assembly: WindowBase.dll"
– dlev
Aug 31 '11 at 16:39
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Print array elements on separate lines in Bash?
...here c is
the first char of IFS).
You almost always want "$@". Same goes for "${arr[@]}".
Always quote them!
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