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new DateTime() vs default(DateTime)
...al.
default(), for any value type (DateTime is a value type) will always call the parameterless constructor.
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Numpy array assignment with copy
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All three versions do different things:
B = A
This binds a new name B to the existing object already named A. Afterwards they refer to the same object, so if you modify one in place, you'll see the change through the other...
Why would json_encode return an empty string
... note below
Here is a recursive function that can force convert to UTF-8 all the strings contained in an array:
function utf8ize($d) {
if (is_array($d)) {
foreach ($d as $k => $v) {
$d[$k] = utf8ize($v);
}
} else if (is_string ($d)) {
return utf8_enc...
Mapping two integers to one, in a unique and deterministic way
...d for e.g. dovetailing. Have a look at this PDF for an introduction to so-called pairing functions. Wikipedia introduces a specific pairing function, namely the Cantor pairing function:
Three remarks:
As others have made clear, if you plan to implement a pairing function, you may soon find you ...
Regex to match any character including new lines
Is there a regex to match "all characters including newlines"?
4 Answers
4
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Rails mapping array of hashes onto single hash
...ARAM1"=>"testVAL1"}
Reducing an array sort of like sticking a method call between each element of it.
For example [1, 2, 3].reduce(0, :+) is like saying 0 + 1 + 2 + 3 and gives 6.
In our case we do something similar, but with the merge function, which merges two hashes.
[{:a => 1}, {:b =...
Is Hash Rocket deprecated?
... I can't find any definitive reference stating the Hash Rocket form is actually deprecated/unadvised as of Ruby 1.9.
1 Answ...
Using FileSystemWatcher to monitor a directory
...s. The program was trying to open a file that was still copying. I removed all of the notify filters except for LastWrite.
private void watch()
{
FileSystemWatcher watcher = new FileSystemWatcher();
watcher.Path = path;
watcher.NotifyFilter = NotifyFilters.LastWrite;
watcher.Filter = "*.*";...
How to set limits for axes in ggplot2 R plots?
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Basically you have two options
scale_x_continuous(limits = c(-5000, 5000))
or
coord_cartesian(xlim = c(-5000, 5000))
Where the first removes all data points outside the given range and the second only adjusts the visible ar...
UUID max character length
...rom the canonical/string representation, or not have a UUID object type at all; the UUID might be stored in string form in a file, making comparison with the binary form cumbersome, etc.
– TaylanUB
Jun 12 '18 at 7:50
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