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Differences in boolean operators: & vs && and | vs ||
...null) & (a.something == 3)){
}
"Short-circuiting" means the operator does not necessarily examine all conditions. In the above examples, && will examine the second condition only when a is not null (otherwise the whole statement will return false, and it would be moot to examine follow...
Search for “does-not-contain” on a DataFrame in pandas
I've done some searching and can't figure out how to filter a dataframe by df["col"].str.contains(word) , however I'm wondering if there is a way to do the reverse: filter a dataframe by that set's compliment. eg: to the effect of !(df["col"].str.contains(word)) .
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What is HEAD in Git?
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@動靜能量: HEAD can point to any commit, it does not need to be the last commit in any branch. (When HEAD points to a commit that is not the last commit in a branch, that is a "detached HEAD").
– Greg Hewgill
Aug 30 '12 at 2:56
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Best approach to real time http streaming to HTML5 video client
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iOS only supports h.264 video. and it only supports HLS for live.
Firefox does not support h.264 at all, unless you use flash
Flash does not work in iOS
The closest thing to an LCD is using HLS to get your iOS users, and flash for everyone else.
My personal favorite is to encode HLS, then use fla...
How to Join to first row
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This is the only answer I found that does a real "Left" join, meaning it does not add any more lines then is in the "Left" table. You just need to put in subquery and add "where RowNum is not null"
– user890332
May 10 '19 a...
How to get a microtime in Node.js?
... - its resolution are nanoseconds and therefore its much higher, also this doesn't mean it has to be more exact.
PS.: Just to be clearer, process.hrtime() returns you a tuple Array containing the current high-resolution real time in a [seconds, nanoseconds]
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What does template mean?
...-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f499106%2fwhat-does-template-unsigned-int-n-mean%23new-answer', 'question_page');
}
);
Post as a guest
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How do i put a border on my grid in WPF?
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it does not work as i want... i've added some code to my question.
– Jason94
May 4 '10 at 22:26
3
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Fastest method to replace all instances of a character in a string [duplicate]
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Warning: This does not work for strings containing newlines. XRegExp has a replace method that does the trick.
– kgriffs
Jul 19 '12 at 15:44
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String was not recognized as a valid DateTime “ format dd/MM/yyyy”
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@Rahat, parse exact will not work if the format doesn't match. The format pattern above is dd/MM/yyyy so a text string with a time in it will not be parsed properly. You'll need to either strip off the time or include it in the format pattern. There's an overload of Par...