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Should we pass a shared_ptr by reference or by value?
When a function takes a shared_ptr (from boost or C++11 STL), are you passing it:
10 Answers
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Best way to find the intersection of multiple sets?
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From Python version 2.6 on you can use multiple arguments to set.intersection(), like
u = set.intersection(s1, s2, s3)
If the sets are in a list, this translates to:
u = set.intersection(*setlist)
where *a_list is list ...
How do you determine the size of a file in C?
... You could probably change the return type to ssize_t and cast the size from an off_t without any trouble. It would seem to make more sense to use a ssize_t :-) (Not to be confused with size_t which is unsigned and cannot be used to indicate error.)
– Ted Percival
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What is a database transaction?
...ible) explanation of a transaction as applied to computing (even if copied from Wikipedia)?
11 Answers
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Laravel: Get base url
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And despite its possible appearance from the example, this is relative to the Laravel's root path, so if you're installed in /something/ it'll make the right URL.
– ceejayoz
Apr 14 '14 at 12:42
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Get a substring of a char* [duplicate]
...that string data without copying it. If you take a pointer to the section from the original string you need to know the length as it will have no null terminator (Without affecting the original string).
– Goz
Nov 12 '13 at 6:56
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Make xargs execute the command once for each line of input
...your input:
xargs -L 1
xargs --max-lines=1 # synonym for the -L option
from the man page:
-L max-lines
Use at most max-lines nonblank input lines per command line.
Trailing blanks cause an input line to be logically continued on
the next input line. Implies -x.
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ViewModel Best Practices
From this question , it looks like it makes sense to have a controller create a ViewModel that more accurately reflects the model that the view is trying to display, but I'm curious about some of the conventions (I'm new to the MVC pattern, if it wasn't already obvious).
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Convert hex string to int in Python
...g to an int, pass the string to int along with the base you are converting from.
Both strings will suffice for conversion in this way:
>>> string_1 = "0xffff"
>>> string_2 = "ffff"
>>> int(string_1, 16)
65535
>>> int(string_2, 16)
65535
Letting int infer
If you p...
What are all the common undefined behaviours that a C++ programmer should know about? [closed]
...literal during preprocessing
Function and Template
Not returning a value from a value-returning function (directly or by flowing off from a try-block)
Multiple different definitions for the same entity (class, template, enumeration, inline function, static member function, etc.)
Infinite recursion...