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What is the lifetime of a static variable in a C++ function?
If a variable is declared as static in a function's scope it is only initialized once and retains its value between function calls. What exactly is its lifetime? When do its constructor and destructor get called?
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What's the most elegant way to cap a number to a segment? [closed]
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The way you do it is pretty standard. You can define a utility clamp function:
/**
* Returns a number whose value is limited to the given range.
*
* Example: limit the output of this computation to between 0 and 255
* (x * 255).clamp(...
How does collections.defaultdict work?
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Usually, a Python dictionary throws a KeyError if you try to get an item with a key that is not currently in the dictionary. The defaultdict in contrast will simply create any items that you try to access (provided of course they do not exist yet). To create such a "default" item, it calls ...
How do I delete an item or object from an array using ng-click?
I am trying to write a function that enables me to remove an item when the button is clicked but I think I am getting confused with the function - do I use $digest ?
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How do I create a unique constraint that also allows nulls?
...want to have a unique constraint on a column which I am going to populate with GUIDs. However, my data contains null values for this columns. How do I create the constraint that allows multiple null values?
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SQL Server principal “dbo” does not exist,
...follow
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edited Mar 5 '18 at 20:39
answered Aug 21 '13 at 14:16
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Singular or plural controller and helper names in Rails
...singular names for controllers and helpers? Nothing seems to rely on this. It even seems helpers don't have to make the same choice about singular vs. plural as their corresponding controllers, at least according to my limited experimentation. Is that true?
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Vim indent xml file
I am learning Vim but I thought this was a simple task but I cannot get it to work. I have browser SO but the solutions are not working for me.
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How best to determine if an argument is not sent to the JavaScript function
...ral different ways to check if an argument was passed to a function. In addition to the two you mentioned in your (original) question - checking arguments.length or using the || operator to provide default values - one can also explicitly check the arguments for undefined via argument2 === undefined...
Changing MongoDB data store directory
...pecifying a MongoDB data directory and have had only one 30 GB primary partition.
9 Answers
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