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What is the usefulness of `enable_shared_from_this`?
...
}
int main()
{
shared_ptr<Y> p(new Y);
shared_ptr<Y> q = p->f();
assert(p == q);
assert(!(p < q || q < p)); // p and q must share ownership
}
The method f() returns a valid shared_ptr, even though it had no member instance. Note that you cannot simply do this...
YouTube iframe API: how do I control an iframe player that's already in the HTML?
...event listeners / getters), have a look at Listening for Youtube Event in jQuery
As a result of a deep code analysis, I've created a function: function callPlayer requests a function call on any framed YouTube video. See the YouTube Api reference to get a full list of possible function calls. Read ...
How do you tell if a string contains another string in POSIX sh?
...swered Jan 10 '12 at 23:01
fjarlqfjarlq
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...
What are the mathematical/computational principles behind this game?
...different from Euclid).
Now, add "finite" into the soup and you have the question:
Can we have a geometry with just 2 points? With 3 points? With 4? With 7?
There are still open questions regarding this problem but we do know this:
If there are geometries with Q points, then Q = n^2 + n + 1 an...
Accessing constructor of an anonymous class
...'s not clear exactly what you mean - I suspect it's worth you asking a new question with an example of what you're trying to achieve.
– Jon Skeet
Feb 25 '14 at 15:01
...
How to concatenate columns in a Postgres SELECT?
... (as you mentioned later), the displayed concatenation just works because, quoting the manual:
[...] the string concatenation operator (||) accepts non-string
input, so long as at least one input is of a string type, as shown in
Table 9.8. For other cases, insert an explicit coercion to text...
Re-ordering columns in pandas dataframe based on column name [duplicate]
...f your column names won't sort lexicographically (e.g., if you want column Q10.3 to appear after Q9.1), you'll need to sort differently, but that has nothing to do with pandas.
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Bash script to calculate time elapsed
...d word should be displayed. The ‘%’ character introduces an
escape sequence that is expanded to a time value or other information.
The escape sequences and their meanings are as follows; the braces
denote optional portions.
%%
A literal ‘%’.
%[p][l]R
The elapsed time in seco...
Regex to Match Symbols: !$%^&*()_+|~-=`{}[]:";'?,./
...
Why is not mentioned quantifiers \Q and \E for escaping the sequence of characters?
– SerG
May 27 '14 at 8:29
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How to turn on (literally) ALL of GCC's warnings?
...specific and version-specific CFLAGS:
compiler_name := $(notdir $(CC))
ifeq ($(compiler_name),gcc)
compiler_version := $(basename $(shell $(CC) -dumpversion))
endif
ifeq ($(compile_name),clang)
compiler_version := $(shell $(CC) --version | awk 'NR==1{print $$3}')
endif
# ...
wflags.gcc.base := -Wal...