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“Invalid signature file” when attempting to run a .jar
...ar file and makes use of an external jar library, bouncy castle . My code compiles fine, but running the jar leads to the following error:
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Python/postgres/psycopg2: getting ID of row just inserted
...y using cursor .execute() and not a cursor .mogrify() before the execute() command, otherwise (as in my case) cursor.fetchone() will not have any results! By using only cursor .execute() without "anything" before that command you will receive an id.
– TheHeroOfTime
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What is the correct way to get a subarray in Scala?
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Are HLists nothing more than a convoluted way of writing tuples?
.... shapeless provides a form of polymorphic function value which allows the compiler to select type-specific cases in exactly the way you're doubtful about. For instance,
// size is a function from values of arbitrary type to a 'size' which is
// defined via type specific cases
object size extends P...
How to undo another user’s checkout in TFS?
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There are at least 2 different ways to do this:
Command Line
There is a command-line utility called Tf.exe that comes with Team Explorer. Find the documentation here. It can be accessed by launching a Visual Studio Command Prompt window. The syntax of the command is:
tf ...
When to use valueChangeListener or f:ajax listener?
...u'd need to add another <f:ajax/> without a listener(!) to the input component. It will cause a form submit which processes only the current component (as in execute="@this").
<h:selectOneMenu value="#{bean.value}" valueChangeListener="#{bean.changeListener}">
<f:selectItems ... ...
How to convert int to NSString?
...[NSNumber stringValue] will always return an NSString. In the code of your comment, force casting with (id) and assigning to a different type is a clear programming mistake: you should never do that. It's like swizzling a method and then making an argument about that method not doing what it was ori...
Using a BOOL property
Apple recommends to declare a BOOL property this way:
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