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How to check if a variable is null or empty string or all whitespace in JavaScript?
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What about using test() instead of match()? return str === null || (/^ *$/).test(str);
– Mario Levrero
Sep 24 '14 at 9:43
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How to get the number of characters in a std::string?
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It depends on what string type you're talking about. There are many types of strings:
const char* - a C-style multibyte string
const wchar_t* - a C-style wide string
std::string - a "standard" multibyte string
std::wstring - a "standard"...
Convert a binary NodeJS Buffer to JavaScript ArrayBuffer
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That's the opposite of what OP wanted.
– Alexander Gonchiy
Apr 22 '16 at 12:33
43
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How do I join two lines in vi?
...hange character from the current line" is a pretty awkward way to describe what J does, and is also not really correct. J "joins" this line to the next. In the process it removes the newline, but also manipulates whitespace in other ways.
– Laurence Gonsalves
D...
How to run a command in the background and get no output?
...;1 &
./b.sh > /dev/null 2>&1 &
The & at the end is what makes your script run in the background.
The > /dev/null 2>&1 part is not necessary - it redirects the stdout and stderr streams so you don't have to see them on the terminal, which you may want to do for nois...
How to run a PowerShell script
...a\ (enter)
Execute the script:
PS> .\run_import_script.ps1 (enter)
What am I missing??
Or: you can run the PowerShell script from cmd.exe like this:
powershell -noexit "& ""C:\my_path\yada_yada\run_import_script.ps1""" (enter)
according to this blog post here
Or you could even run y...
Preserve HTML font-size when iPhone orientation changes from portrait to landscape
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Thank you for this... I have been trying to figure out what was going on with font-sizing in landscape xD
– Jeff Shaver
Jan 21 '14 at 21:36
3
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The import org.junit cannot be resolved
...n org.testng which i am not able to get in src/main/java classes. any idea what could solve this ?
– Vigneshraj Sekarbabu
Dec 16 '18 at 8:53
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Why is XOR the default way to combine hashes?
...XOR is not a good way to combine hashes due to its commutativity. Consider what would happen if you stored the permutations of {1, 2, …, 10} in a hash table of 10-tuples.
A much better choice is m * H(A) + H(B), where m is a large odd number.
Credit: The above combiner was a tip from Bob Jenkins...
MySQL root access from all hosts
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Please add more detail. In what file or framework does that setting need to happen? Please be more specific about the ethX configuration.
– BPS
Apr 21 '17 at 20:31
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