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Count Rows in Doctrine QueryBuilder
...
If you need to count a more complex query, with groupBy, having etc... You can borrow from Doctrine\ORM\Tools\Pagination\Paginator:
$paginator = new \Doctrine\ORM\Tools\Pagination\Paginator($query);
$totalRows = count($paginator);
...
Inserting a Python datetime.datetime object into MySQL
...mat string."""
# 6-digits string.
microseconds = regexp.search(dt).group(1)
return regexp.sub('.%d' % round(float(microseconds) / 1000), dt)
Serialize form data to JSON [duplicate]
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"name should be ALWAYS unique"... Ummm... checkbox group?
– Jeff Lowery
Jun 5 '15 at 0:19
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Drop unused factor levels in a subsetted data frame
...etted dataframe and use it as the data argument to a lattice function, and groups will be handled correctly.
– Mars
Nov 21 '15 at 5:44
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html select option separator
...t and be the best supported. I've also included an example of using the optgroup.
optgroup (this way kinda sucks):
<select>
<optgroup>
<option>First</option>
</optgroup>
<optgroup label="_________">
<option>Second</o...
How to clear jQuery validation error messages?
...d text color unless you call .removeClass(). Example: $('#myform .control-group').removeClass('error');
– jlewkovich
May 30 '14 at 15:13
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Is log(n!) = Θ(n·log(n))?
...veration is quite simple:
see http://en.wikipedia.org/wiki/Logarithm -> Group Theory
log(n!) = log(n * (n-1) * (n-2) * ... * 2 * 1) = log(n) + log(n-1) + ... + log(2) + log(1)
Think of n as infinitly big. What is infinite minus one? or minus two? etc.
log(inf) + log(inf) + log(inf) + .....
Why is sed not recognizing \t as a tab?
...at will work for GNU echo, but not BSD echo. That is explained by The Open Group at http://pubs.opengroup.org/onlinepubs/9699919799/utilities/echo.html#tag_20_37_16 And this is an example of why trying to avoid bashisms usually fail.
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...者的用户id
e
USER
进程所有者的用户名
f
GROUP
进程所有者的组名
g
TTY
启动进程的终端名。不是从终端启动的进程则显示为 ?
h
PR
优先级
i
NI
nice值。负值表示高优先级，正值表示低优先...
What does collation mean?
...d ones" in some Western European languages, you must take into account the groups of letters, which sometimes are sorted differently, also.
Traditionally, in Spanish, "ch" was considered a letter in its own right, same with "ll" (both of which represent a single phoneme), so a list would get sorted...