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What are database normal forms and can you give examples? [closed]
...self. A casual user should be able to read your answer and get some value from it without having to click the blog link. The answer should be self-contained, in other words.
– Robert Harvey
Oct 22 '12 at 23:03
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What is the use of the %n format specifier in C?
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From here we see that it stores the number of characters printed so far.
n The argument shall be a pointer to an integer into which is written the number of bytes written to the output so far by this call to one of the ...
URL encode sees “&” (ampersand) as “&” HTML entity
...ing to encodeURIComponent(), which is the correct method to use, is coming from the result of accessing the innerHTML property. The solution is to get the innerText/textContent property value instead:
var str,
el = document.getElementById("myUrl");
if ("textContent" in el)
str = encodeUR...
How do I configure Maven for offline development?
...at the -o option doesn't work properly and that the go-offline goal is far from sufficient to allow a full offline build: See the solution I found here: stackoverflow.com/q/43661755/1767316
– user1767316
Apr 28 '17 at 7:19
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Does a UNIQUE constraint automatically create an INDEX on the field(s)?
...ike a regular index with added checking for uniqueness. Using SHOW INDEXES FROM customer you can see your unique keys are in fact B-tree type indexes.
A composite index on (email, user_id) is enough, you don't need a separate index on email only - MySQL can use leftmost parts of a composite index. ...
C Macro definition to determine big endian or little endian machine?
...(which can be checked by #if UINT8_MAX). Note that CHAR_BIT is independent from uint8_t.
– Andreas Spindler
Oct 31 '12 at 11:33
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Nginx Different Domains on Same IP
...leted it for clarity. To test it you might want to try serving a text file from each server first before actually serving php. That's why I left the 'root' directive in there.
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css z-index lost after webkit transform translate3d
... is ordered by the nearest element of html is to the start of the tag. So from up to below.
I hope that this help
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Add zero-padding to a string
...dLeft(4,'0') is still "12345" - it won't truncate it. This doesn't detract from this answer by the way since it meets all the specs (there's something strangely satisfying about having an answer you upvoted chosen as the accepted one (though not as satisfying as having one of your own accepted of co...
Cron job every three days
...f days since 01-01-1970 modulo 3 is 0.
If you want it to be every 3 days from a specific date, use the following format:
0 0 * * * bash -c '(( $(date +\%s -d "2019-01-01") / 86400 \% 3 == 0 )) && runmyjob.sh
sha...