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Assigning default values to shell variables with a single command in bash
I have a whole bunch of tests on variables in a bash (3.00) shell script where if the variable is not set, then it assigns a default, e.g.:
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Javadoc @see or {@link}?
Could someone tell me the difference between javadoc @see and {@link} ?
3 Answers
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Rake just one migration
I'm trying to run just one migration out of a whole bunch in my rails app. How can I do this? I don't want to run any of the migrations before or after it. Thanks.
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Difference between e.target and e.currentTarget
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Ben is completely correct in his answer - so keep what he says in mind. What I'm about to tell you isn't a full explanation, but it's a very easy way to remember how e.target, e.currentTarget work in relation to mouse events and the display list:
e.t...
How do I increase the scrollback buffer in a running screen session?
Lets say I have a currently running screen session I am interacting with through putty. I've realized that the scrollback buffer is too small and would like to increase it without starting a new screen session.
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Boolean literals in PowerShell
What are the boolean literals in PowerShell?
3 Answers
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Check whether or not the current thread is the main thread
Is there any way to check whether or not the current thread is the main thread in Objective-C?
13 Answers
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Sql Server 'Saving changes is not permitted' error ► Prevent saving changes that require table re-cr
When I create a table in SQL Server and save it, if I try to edit the table design, like change a column type from int to real, I get this error:
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Undo VS 'Exclude from project'?
Is there a way to undo the 'exclude from project' operation in Visual Studio (2008) ?
5 Answers
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Most efficient way to check for DBNull and then assign to a variable?
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I must be missing something. Isn't checking for DBNull exactly what the DataRow.IsNull method does?
I've been using the following two extension methods:
public static T? GetValue<T>(this DataRow row, string columnName) where T : st...