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Is Hash Rocket deprecated?
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The author of that blog post is being overly dramatic and foolish, the => is still quite necessary. In particular:
You must use the rocket for symbols that are not valid labels: :$set => x is valid but $set: x is not. In Ruby 2.2+ you can get around this problem with quo...
How to validate an email address in PHP
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The easiest and safest way to check whether an email address is well-formed is to use the filter_var() function:
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
// invalid emailaddress
}
Additionally you can check whether the do...
How to set UICollectionViewDelegateFlowLayout?
...from UICollectionViewDelegate.
I admit it caught me off guard at first.
Oh and this will only work if self.collectionView.collectionViewLayout is actually set to your flow layout. (or set with initWithFrame:collectionViewLayout:)
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Detecting CTRL+C in Node.js
... postfix: "",
imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9....
android fragment onRestoreInstanceState
...r configuration changes, but what if you go to an activity from a fragment and then go back to the fragment?
– speedynomads
Jun 4 '13 at 16:41
1
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How can I add items to an empty set in python
...>>> type(D)
<type 'set'>
What you've made is a dictionary and not a Set.
The update method in dictionary is used to update the new dictionary from a previous one, like so,
>>> abc = {1: 2}
>>> d.update(abc)
>>> d
{1: 2}
Whereas in sets, it is used to a...
XML Document to String
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and the writer.getBuffer().toString() can just be writer.toString()
– bvdb
Jun 1 '17 at 10:23
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How to redirect Valgrind's output to a file?
... this saves just stderr, is it possible to save both stderr and stdout into same file in the same order as is written in terminal ( i.e. to keep coherence between outputs of tested program and error reported by valgrind) ?
– Prokop Hapala
Jan 20 ...
Difference between this and self in self-type annotations?
In various Scala literature I see some self-type annotations using "this" and others using "self":
2 Answers
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Raise warning in Python without interrupting program
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Thank you very much. And how then do I test that the Warning has been thrown using unittest? I cannot use assertRaises() anymore.
– Tomas Novotny
Oct 8 '10 at 15:14
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