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Recommended way to insert elements into map [duplicate]
...he default constructor because the map checks if the element exists. If it doesn't then it creates one using default constructor and returns a reference (or const reference to it).
Because map containers do not allow for duplicate key values, the insertion operation checks for each element inserte...
What are the differences between a pointer variable and a reference variable in C++?
... Brian, the stack is not relevant. References and pointers do not have to take space on the stack. They can both be allocated on the heap.
– Derek Park
Sep 19 '08 at 4:33
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Bash tool to get nth line from a file
Is there a "canonical" way of doing that? I've been using head -n | tail -1 which does the trick, but I've been wondering if there's a Bash tool that specifically extracts a line (or a range of lines) from a file.
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How to empty a list?
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This actually removes the contents from the list, but doesn't replace the old label with a new empty list:
del lst[:]
Here's an example:
lst1 = [1, 2, 3]
lst2 = lst1
del lst1[:]
print(lst2)
For the sake of completeness, the slice assignment has the same effect:
lst[:] = [...
Classes residing in App_Code is not accessible
... of the App_Code folder. However I cannot access this from my other pages. Does something need to be configured to allow this? I have made it work in previous projects, but not in this one, somehow.
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When to choose checked and unchecked exceptions
...uage with checked exceptions), when creating your own exception class, how do you decide whether it should be checked or unchecked?
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Create a custom callback in JavaScript
All I need to do is to execute a callback function when my current function execution ends.
10 Answers
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Ubuntu, vim, and the solarized color palette
... the question above for the following, but karma of 50 is required. Please do email me via the project site to troubleshoot this further as I am in the process of establishing a good walkthrough for common color issues.
shar...
Animate scrollTop not working in firefox
...d some are arguably rather far-fetched.
If the callback is idempotent and doesn't require a lot of computing power, firing it twice may be a complete non-issue. If multiple invocations of the callback are truly an issue, and if you want to avoid feature-detection, it might be more straight-forward ...
What are the risks of running 'sudo pip'?
...comments or responses that state emphatically that running pip under sudo is "wrong" or "bad", but there are cases (including the way I have a bunch of tools set up) where it is either much simpler, or even necessary to run it that way.
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