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Find most frequent value in SQL column
...occurrence` DESC
LIMIT 1;
Replace column and my_table. Increase 1 if you want to see the N most common values of the column.
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Why can I not push_back a unique_ptr into a vector?
...correct. You cannot use it to manage a pointer to a local variable. The lifetime of a local variable is managed automatically: local variables are destroyed when the block ends (e.g., when the function returns, in this case). You need to dynamically allocate the object:
std::unique_ptr<int&g...
iPhone - Get Position of UIView within entire UIWindow
... the bounds of the window. The screen's and device coordinate systems are different and should not be mixed up with window coordinates.
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What are file descriptors, explained in simple terms?
...dded great stuff. I will add just my 2 cents.
According to Wikipedia we know for sure: a file descriptor is a non-negative integer. The most important thing I think is missing, would be to say:
File descriptors are bound to a process ID.
We know most famous file descriptors are 0, 1 and 2.
0 co...
Include jQuery in the JavaScript Console
...xample, on a website I would like to get the number of rows in a table. I know this is really easy with jQuery.
20 Answers
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Using Enum values as String literals
...you have FOUR options here. All four offer a solution but with a slightly different approach...
Option One: use the built-in name() on an enum. This is perfectly fine if you don't need any special naming format.
String name = Modes.mode1.name(); // Returns the name of this enum constant, exact...
Adding external library into Qt Creator project
...rary name (without the extension and without any 'lib' prefix). Of course, if you are including a Windows specific lib, this really doesn't matter.
In case you want to store your lib files in the project directory, you can reference them with the $$_PRO_FILE_PWD_ variable, e.g.:
LIBS += -L"$$_PRO_...
Jackson Vs. Gson [closed]
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Gson 1.6 now includes a low-level streaming API and a new parser which is actually faster than Jackson.
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Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...PHP等语言不一样，sh的流程控制不可为空，如：
<?php
if (isset($_GET["q"])) {
search(q);
}
else {
//do nothing
}
在sh/bash里可不能这么写，如果else分支没有语句执行，就不要写这个else。
还要注意，sh里的if [ $foo -eq 0 ]，这个方括...
When should I use perror(“…”) and fprintf(stderr, “…”)?
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@R.., ha, I already have, and as far as I know they are not paying me a thing. And since MS seems to be cutting their support for C completely, at the end I will be the only one :) strerror_s is actually not too bad as an interface.
– Jens Gusted...