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C++ Singleton design pattern
...++ static initialization order problems
See this article describing lifetimes:
What is the lifetime of a static variable in a C++ function?
See this article that discusses some threading implications to singletons:
Singleton instance declared as static variable of GetInstance method, is it thr...
What is the difference between “text” and new String(“text”)?
...essarily ==. It is usually wrong to use == on reference types; most of the time equals need to be used instead.
Nonetheless, if for whatever reason you need to create two equals but not == string, you can use the new String(anotherString) constructor. It needs to be said again, however, that this i...
How to append a char to a std::string?
...he append method is really more useful when adding the same character many times.
– Patrice Bernassola
Sep 24 '09 at 15:53
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Run certain code every n seconds [duplicate]
...uld go through whatever code I had, then once it had been 5 seconds (with time.sleep() ) it would execute that code. I would be using this to update a file though, not print Hello World.
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What is “(program)” in Chrome debugger’s profiler?
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Regarding high % of program(), sometimes css animations lead to a high CPU usage, which will be reflected in program(). Unfortunately the profiler can't help pin point the source.
– ılǝ
Dec 15 '15 at 15:13
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Why is it slower to iterate over a small string than a small list?
I was playing around with timeit and noticed that doing a simple list comprehension over a small string took longer than doing the same operation on a list of small single character strings. Any explanation? It's almost 1.35 times as much time.
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What does 'synchronized' mean?
... More clearly: synchronized methods can't be called in the same time from multiple threads.
– peterh - Reinstate Monica
Mar 15 '16 at 12:35
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Return multiple columns from pandas apply()
... function that contains the new data, preventing the need to iterate three times. Passing axis=1 to the apply function applies the function sizes to each row of the dataframe, returning a series to add to a new dataframe. This series, s, contains the new values, as well as the original data.
def ...
Add number of days to a date
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This should be
echo date('Y-m-d', strtotime("+30 days"));
strtotime
expects to be given a string containing a US English date format and will try to parse that format into a Unix timestamp (the number of seconds since January 1 1970 00:00:00 UTC), relative ...
What's the equivalent of use-commit-times for git?
I need the timestamps of files on my local and on my server to be in sync. This is accomplished with Subversion by setting use-commit-times=true in the config so that the last modified of each file is when it was committed.
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