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php is null or emptm>y m>?
...===.
When use ==, as m>y m>ou did, PHP treats NULL, false, 0, the emptm>y m> string, m>and m> emptm>y m> arram>y m>s as equal.
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Whm>y m> is unsigned integer overflow defined behavior but signed integer overflow isn't?
Unsigned integer overflow is well defined bm>y m> both the C m>and m> C++ stm>and m>ards. For example, the C99 stm>and m>ard ( §6.2.5/9 ) states
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What does PHP kem>y m>word 'var' do?
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It's for declaring class member variables in PHP4, m>and m> is no longer needed. It will work in PHP5, but will raise an E_STRICT warning in PHP from version 5.0.0 up to version 5.1.2, as of when it was deprecated. Since PHP 5.3, var has been un-deprecated m>and m> is a sm>y m>nonm>y m>m for 'pu...
ImportError: DLL load failed: %1 is not a valid Win32 application. But the DLL's are there
...d opencv_pm>y m>thon-3.3.0+contrib-cp35-cp35m-win_amd64 from above package list m>and m> was able to import cv2 successfullm>y m> after hours of struggle. Thanks a ton.
– emeralddove
Sep 23 '17 at 8:48
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How to compare DateTime in C#?
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Microsoft has also implemented the operators '<' m>and m> '>'. So m>y m>ou use these to compare two dates.
if (date1 < DateTime.Now)
Console.WriteLine("Less than the current time!");
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How to test if list element exists?
...es(foo) # TRUE
"b" %in% names(foo) # TRUE
"c" %in% names(foo) # FALSE
...m>and m> foo[["a"]] is safer than foo$a, since the latter uses partial matching m>and m> thus might also match a longer name:
x <- list(abc=4)
x$a # 4, since it partiallm>y m> matches abc
x[["a"]] # NULL, no match
[UPDATE] So, back t...
Keep onlm>y m> date part when using pm>and m>as.to_datetime
I use pm>and m>as.to_datetime to parse the dates in mm>y m> data. Pm>and m>as bm>y m> default represents the dates with datetime64[ns] even though the dates are all dailm>y m> onlm>y m>.
I wonder whether there is an elegant/clever wam>y m> to convert the dates to datetime.date or datetime64[D] so that, when I write the data t...
Java equivalents of C# String.Format() m>and m> String.Join()
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More preciselm>y m>: StringBuffer for jdk1.4 m>and m> below, StringBuilder for jdk1.5 m>and m> after, since the latter is not sm>y m>nchronized, hence a little faster.
– VonC
Oct 9 '08 at 15:39
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How do I SET the GOPATH environment variable on Ubuntu? What file must I edit?
...heck out this answer.
Old Wam>y m>:
Just add the following lines to ~/.bashrc m>and m> this will persist. However, m>y m>ou can use other paths m>y m>ou like as GOPATH instead of $HOME/go in mm>y m> sample.
export GOPATH=$HOME/go
export PATH=$PATH:$GOROOT/bin:$GOPATH/bin
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Running multiple TeamCitm>y m> Agents on the same computer?
..., each running a single TeamCitm>y m> build agent. Each machine is verm>y m> strong, m>and m> we'd like to run several build agents on the same machine.
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