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What's the difference between [ and [[ in Bash? [duplicate]
...You get pattern matching aka globbing for free. Maybe you're less strict about how to type yes. Maybe you're okay if the user types y-anything. Got you covered:
if [[ $ANSWER = y* ]]
Keep in mind that it is a bash extension, so if you are writing sh-compatible scripts then you need to stick with...
getString Outside of a Context or Activity
I've found the R.string pretty awesome for keeping hardcoded strings out of my code, and I'd like to keep using it in a utility class that works with models in my application to generate output. For instance, in this case I am generating an email from a model outside of the activity.
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Best way to do nested case statement logic in SQL Server
...t comments in to explain what is going on. If it is too complex, break it out into function.
SELECT
col1,
col2,
col3,
CASE WHEN condition THEN
CASE WHEN condition1 THEN
CASE WHEN condition2 THEN calculation1
ELSE calculation2 END
ELSE
CASE WHEN c...
How to retry after exception?
...
I would definitely leave out the while True: line, otherwise the break wil continue the outer loop to exhaustion.
– Jan
Sep 17 '18 at 11:50
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javac : command not found
...a-1.6.0-openjdk-devel, which both include javac.
By the way: you can find out which package provides javac with a yum search, e.g.
su -c 'yum provides javac'
on more recent releases of CentOS e.g. 6 the command changes to
su -c 'yum provides */javac'
Another note: using yum and openjdk is onl...
Convert UTC date time to local date time
...tty certain this can't possibly work for any time zone which is 30 minutes out? It seems to round to whole hours.
– NickG
Apr 20 '16 at 16:14
3
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Integer to hex string in C++
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Use <iomanip>'s std::hex. If you print, just send it to std::cout, if not, then use std::stringstream
std::stringstream stream;
stream << std::hex << your_int;
std::string result( stream.str() );
You can prepend the first << with << "0x" or whatever you like i...
Regular Expression to reformat a US phone number in Javascript
...ng.length < oldstring.length OR to track the cursor position and figure out when the user has just backspaced over those delimiters e.g. if (cursorPosition === 4 && numericString.length > 3)
– Peter Hollingsworth
Apr 7 at 21:58
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Select first 4 rows of a data.frame in R
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You can use the "index" answer pointed out elsewhere. In this situation I normally use the slice function in dplyr. (Behavior depends on the grouping.)
– Eduardo Leoni
May 28 '18 at 21:16
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force client disconnect from server with socket.io and nodejs
... want to close the connection between them and my server, how would I go about doing that?
15 Answers
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