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Coalesce function for PHP?
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@Quill what's that supposed to mean? Did you the suggested solution with reference?
– Ben Sinclair
Aug 16 '15 at 10:08
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How can I get dict from sqlite query?
...c.execute('SELECT * FROM table').fetchall()
19.8 µs ± 1.05 µs per loop (mean ± std. dev. of 7 runs, 100000 loops each)
vs:
conn.row_factory = lambda c, r: dict([(col[0], r[idx]) for idx, col in enumerate(c.description)])
c = conn.cursor()
%timeit c.execute('SELECT * FROM table').fetchall()
1...
What does the `#` operator mean in Scala?
...articular instance. In other words, there's no A.B, but there's A#B, which means a B nested class of any instance of A.
We can see this in work by changing the code above:
class A {
class B
def f(b: B) = println("Got my B!")
def g(b: A#B) = println("Got a B.")
}
And trying it out:
scala&...
What does “atomic” mean in programming?
...es the first 32 bits, and a second one which writes the last 32 bits. That means that another thread might read the value of foo, and see the intermediate state.
Making the operation atomic consists in using synchronization mechanisms in order to make sure that the operation is seen, from any othe...
Permission denied (publickey) when deploying heroku code. fatal: The remote end hung up unexpectedly
... %HOME% ( Windows )
To set your HOME directory correctly ( by correctly I mean the parent directory of .ssh directory, so that ssh could look for keys in the correct directory ) refer these links :
SO Answer on how to set Unix environment variable permanently
SO Question regarding ssh looking for...
What is a “batch”, and why is GO used?
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So then GO means send it and then don't run the next batch until the client receives "OK, that batch is done and was successful" basically is what the GO does so that the next batch can be run successfully and the client knows for sure ...
include antiforgerytoken in ajax post ASP.NET MVC
...t is so simple! when you use @Html.AntiForgeryToken() in your html code it means that server has signed this page and each request that is sent to server from this particular page has a sign that is prevented to send a fake request by hackers. so for this page to be authenticated by the server you s...
What does @hide mean in the Android source code?
...ttribute is just part of Javadoc (droiddoc also), so the @hide just simply means the method/class/field is excluded from the API docs.
For example, the checkUidPermission() method in ActivityManager.java uses @hide:
/** @hide */
public static int checkUidPermission(String permission, int uid) {
...
How to compile a static library in Linux?
...and static library with the gnu compiler [gcc]
gcc -c -o out.o out.c
-c means to create an intermediary object file, rather than an executable.
ar rcs libout.a out.o
This creates the static library. r means to insert with replacement, c means to create a new archive, and s means to write an i...
Why does String.split need pipe delimiter to be escaped?
...xpects a regular expression argument. An unescaped | is parsed as a regex meaning "empty string or empty string," which isn't what you mean.
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