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Check if Python Package is installed
What's a good way to check if a package is installed while within a Python script? I know it's easy from the interpreter, but I need to do it within a script.
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What is the difference between NULL, '\0' and 0?
In C, there appear to be differences between various values of zero -- NULL , NUL and 0 .
11 Answers
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What is the difference between `new Object()` and object literal notation?
What is the difference between this constructor-based syntax for creating an object:
11 Answers
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how can I see what ports mongo is listening on from mongo shell?
If I have a mongo instance running, how can I check what port numbers it is listening on from the shell? I thought that db.serverStatus() would do it but I don't see it. I see this
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CSS3 :unchecked pseudo-class
...eeded on the unchecked state and would need removed from the checked state if used on the input[type="checkbox"] selector. See example below for clarification.
input[type="checkbox"] {
/* Base Styles aka unchecked */
font-weight: 300; // Will be overwritten by :checked
font-size: 16px; // Bas...
How to use ADB Shell when Multiple Devices are connected? Fails with “error: more than one device an
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Use the -s option BEFORE the command to specify the device, for example:
adb -s 7f1c864e shell
See also http://developer.android.com/tools/help/adb.html#directingcommands
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How do I turn on SQL debug logging for ActiveRecord in RSpec tests?
...ould try setting the ActiveRecord logger to stdout in your test somewhere. If you're using rspec, maybe in the spec helper?
ActiveRecord::Base.logger = Logger.new(STDOUT)
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Convert pem key to ssh-rsa format
I have a certificate in der format, from it with this command I generate a public key:
8 Answers
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Using the Android Application class to persist data
...vity. Based on my findings, the Application class does not have the same life-cycle (i.e. it is, for all intents and purposes, always instantiated). Does it make sense to store the state information inside of the application class and then reference it from the Activity, or is that generally not t...
Get free disk space
...me)
{
foreach (DriveInfo drive in DriveInfo.GetDrives())
{
if (drive.IsReady && drive.Name == driveName)
{
return drive.TotalFreeSpace;
}
}
return -1;
}
good luck!
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