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What are “named tuples” in Python?
...ctions, only fields with them. You can even use your named tuple types as base classes:
class Point(namedtuple('Point', 'x y')):
[...]
However, as with tuples, attributes in named tuples are immutable:
>>> Point = namedtuple('Point', 'x y')
>>> pt1 = Point(1.0, 5.0)
>&g...
How to change a module variable from another module?
...s to be told this in the "look out" sort of way. That should never happen: based on common usage, Python took the wrong path. Create an"import value" if need be, but don't conflate symbols with values at time of import.
– Mark Gerolimatos
Nov 12 '17 at 11:33
...
How can I open a link in a new window?
...ing solution to this issue. I was creating spans which contain information based on the return from a web service. I thought about trying to put a link around the span so that if I clicked on it, the "a" would capture the click.
But I was trying to capture the click with the span... so I thought wh...
How can one use multi threading in PHP applications
... a web server environment. Threading in PHP should therefore remain to CLI-based applications only.
Simple Test
#!/usr/bin/php
<?php
class AsyncOperation extends Thread {
public function __construct($arg) {
$this->arg = $arg;
}
public function run() {
if ($this...
Which is faster: Stack allocation or Heap allocation
...ode with Linux (Linux 3.10.7-gentoo #2 SMP Wed Sep 4 18:58:21 MDT 2013 x86_64), modifying for the HR timer, and using 100 million iterations in each loop yields this performance: stack allocation took 0.15354 seconds, heap allocation took 0.834044 seconds with -O0 set, making Linux heap allocation o...
C# Sort and OrderBy comparison
...
public PersonList(IEnumerable<Person> persons)
: base(persons)
{
}
public PersonList()
{
}
public override string ToString()
{
var names = Math.Min(Count, 5);
var builder = new StringBuilder()...
How do sessions work in Express.js with Node.js?
... (like connect-redis).
Details
Express.js/Connect creates a 24-character Base64 string using utils.uid(24) and stores it in req.sessionID. This string is then used as the value in a cookie.
Client Side
Signed cookies are always used for sessions, so the cookie value will have the following forma...
git cherry-pick says “…38c74d is a merge but no -m option was given”
...m option. For example, git cherry-pick -m 1 fd9f578 to use parent 1 as the base.
I can't say for sure for your particular situation, but using git merge instead of git cherry-pick is generally advisable. When you cherry-pick a merge commit, it collapses all the changes made in the parent you didn't...
Why is setTimeout(fn, 0) sometimes useful?
...d - I just made it very detailed.
UPDATE: I have made a JSFiddle to live-demonstrate the explanation below: http://jsfiddle.net/C2YBE/31/ . Many thanks to @ThangChung for helping to kickstart it.
UPDATE2: Just in case JSFiddle web site dies, or deletes the code, I added the code to this answer at...
How to filter array in subdocument with MongoDB [duplicate]
...
Use $filter aggregation
Selects a subset of the array to return based on the specified
condition. Returns an array with only those elements that match the
condition. The returned elements are in the original order.
db.test.aggregate([
{$match: {"list.a": {$gt:3}}}, // <-- mat...