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Most efficient way to determine if a Lua table is empty (contains no entries)?
...fferent metamethods, the equality operation results in false, without even calling any metamethod". (The quote is at the bottom of this page from Programming in Lua on lua.org ). Does that remove the need to avoid __eq overloading for nil?
– SansWit
Dec 23 '19 ...
Java String to SHA1
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Just use the apache commons codec library. They have a utility class called DigestUtils
No need to get into details.
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Set NOW() as Default Value for datetime datatype?
...ml
Prior to 5.6.5, you need to use the TIMESTAMP data type, which automatically updates whenever the record is modified. Unfortunately, however, only one auto-updated TIMESTAMP field can exist per table.
CREATE TABLE mytable (
mydate TIMESTAMP
)
See: http://dev.mysql.com/doc/refman/5.1/en/crea...
Best way to give a variable a default value (simulate Perl ||, ||= )
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In PHP 7 we finally have a way to do this elegantly. It is called the Null coalescing operator. You can use it like this:
$name = $_GET['name'] ?? 'john doe';
This is equivalent to
$name = isset($_GET['name']) ? $_GET['name']:'john doe';
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How to Apply Gradient to background view of iOS Swift App
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self.view.layer.insertSublayer(gradientLayer, at:0)
}
Then call this method within viewWillAppear
override func viewWillAppear(_ animated: Bool) {
setGradientBackground()
super.viewWillAppear(animated)
}
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Why should you remove unnecessary C# using directives?
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You may have name clashes if you call your classes like the (unused) classes in the namespace. In the case of System.Text, you'll have a problem if you define a class named "Encoder".
Anyways this is usually a minor problem, and detected by the compiler.
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Free XML Formatting tool [closed]
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Firstobject's free XML editor for Windows is called foxe is a great tool.
Open or paste your XML into it and press F8 to indent (you may need to set the number of indent spaces as it may default to 0).
It looks simple, however it contains a custom written XML parser...
Maximum request length exceeded.
...ad action set to. In my case, I have a Documents controller with an action called Upload that I post the form to. In your case it would be whatever the url to your action would be.
– Nick Albrecht
Aug 6 '14 at 16:17
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Casperjs/PhantomJs vs Selenium
...ered Dec 31 '12 at 10:38
Ariya HidayatAriya Hidayat
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How to create fixed space and flexible space bar button items programmatically?
I want to create UIBarButtonItems programmatically and place these fixed space items between buttons.
7 Answers
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