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A migration to add unique constraint to a combination of columns
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– Rafał Cieślak
Mar 23 '15 at 10:32
8
Actually there is one reason: It is an implementation de...
T-SQL split string
...AXRECURSION 0) (or MAXRECURSION <longest possible string length if < 32768>) to the outer query in order to avoid errors with recursion for strings > 100 characters. If that is also not a good alternative then see this answer as pointed out in the comments.
(Also, the delimiter will hav...
How can I repeat a character in Bash?
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32 Answers
32
Active
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Inherit from a generic base class, apply a constraint, and implement an interface in C#
...am Robinson
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Remove CSS class from element with JavaScript (no jQuery) [duplicate]
...he latest version of most modern browsers:
ELEMENT.classList.remove("CLASS_NAME");
remove.onclick = () => {
const el = document.querySelector('#el');
if (el.classList.contains("red")) {
el.classList.remove("red");
}
}
.red {
background: red
}
<div id='el' class="r...
Best practice multi language website
...uage: the content of [:query] segment; and two additional sources:
value $_COOKIE['lang'] for that particular browser
list of languages in HTTP Accept-Language (1), (2) header
First, you need to match the query to one of defined routing patterns (if your pick is Laravel, then read here). On succe...
ArrayList initialization equivalent to array initialization [duplicate]
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answered May 3 '10 at 20:32
jayshaojayshao
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How to know what the 'errno' means?
... Read-only file system
31 EMLINK Too many links
32 EPIPE Broken pipe
33 EDOM Numerical argument out of domain
34 ERANGE Numerical result out of range
35 EDEADLK Resource deadlock avoided
35 EDEADLOCK Resou...
Mean per group in a data.frame [duplicate]
... 22 87
Cat 2 67 43
Cat 3 45 32', header=TRUE)
aggregate(d[, 3:4], list(d$Name), mean)
Group.1 Rate1 Rate2
1 Aira 16.33333 47.00000
2 Ben 31.33333 50.33333
3 Cat 44.66667 54.00000
Here we aggregate columns 3 and 4 of data.frame d, ...
Google Gson - deserialize list object? (generic type)
...Van Linh
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