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Kotlin: how to pass a function as parameter to another?
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Use :: to signify a function reference, and then:
fun foo(m: String, bar: (m: String) -> Unit) {
bar(m)
}
// my function to pass into the other
fun buz(m: String) {
println("another message: $m")
}
// someone passing buz into foo
fun something() {
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Python: finding an element in a list [duplicate]
...x in mylist if x.attr == "foo"][0]
Of course this assumes the existence (and, actually, uniqueness) of a suitable element in the list.
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How can I copy data from one column to another in the same table?
... This will also work if you want to transfer old value to other column and update the first one: UPDATE table SET columnA = 'new value', columnB = columnA. Like other answer says - don't forget the WHERE clause to update only what's needed.
– Carl di Ortus
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Get object by id()? [duplicate]
...The Python weakref module lets you keep references, dictionary references, and proxies to objects without having those references count in the reference counter. They're like symbolic links.
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What is the difference between ArrayList.clear() and ArrayList.removeAll()?
...h faster since it doesn't have to deal with all those extra method calls.
And as Atrey points out, c.contains(..) increases the time complexity of removeAll to O(n2) as opposed to clear's O(n).
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Is there a VB.NET equivalent for C#'s '??' operator?
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To understand the previous comments, look at the edit history.
– Zev Spitz
Jul 11 '18 at 7:20
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How do I decode a URL parameter using C#?
...t didn't fully work with just one call! I ran Uri.UnescapeDataString twice and got what I wanted!! :D
– C0NFUS3D
Dec 31 '13 at 2:28
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Why can't I forward-declare a class in a namespace using double colons?
...viously declared) entities. They can't be used to introduce new entities.
And you are in fact "reopening" the namespace to declare new entities. If the class Class is later defined as a member of different namespace - it is a completely different class that has nothing to do with the one you declar...
Add a fragment to the URL without causing a redirect?
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No worries - and it makes you wonder why it always returns it.
– alex
Nov 26 '10 at 2:13
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Getting HTTP code in PHP using curl
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I edited your post and pasted the working example code as a whole. I find it this way more helpful. Btw., +1 for mentioning CURLOPT_HEADER and CURLOPT_NOBODY settings! :)
– Sk8erPeter
Dec 5 '12 at 16:43
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