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What are the differences between Rust's `String` and `str`?
...of UTF-8 bytes of dynamic length somewhere in memory. Since the size is unknown, one can only handle it behind a pointer. This means that str most commonly2 appears as &str: a reference to some UTF-8 data, normally called a "string slice" or just a "slice". A slice is just a view onto some data,...
Why does X[Y] join of data.tables not allow a full outer join, or a left join?
... suggestion with unique() is a great help. That ought to be in the FAQ. I know Matthew Dowle "designed it for his own use, and he wanted it that way." (FAQ 1.9), but I thought X[Y,all=T] could be an elegant way to specify a full outer join within the data.table X[Y] syntax. Or X[Y,all.x=T] for the ...
UITextField - capture return button event
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@Praxiteles This can now be done in storyboard without requiring delegation please check answer below.
– Blake Lockley
Feb 27 '18 at 23:20
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How do I copy the contents of a String to the clipboard in C#? [duplicate]
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@DannyBeckett Now only 1 down.
– Anonymous Pi
Mar 26 '14 at 15:36
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CSS div element - how to show horizontal scroll bars only?
...hey'd always done it that way, but is rather an inconvenience for everyone now.)
On the other hand it's entirely possible IE8 will have fixed the bug anyway.
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JavaScript variables declare outside or inside loop?
... does not have block scope like many other C-like languages.
That is also known as lexical scope.
If you declare something like
var foo = function(){
for(var i = 0; i < 10; i++){
}
};
This gets hoisted to:
var foo = function(){
var i;
for(i = 0; i < 10; i++){
}
}
So ...
Unicode Processing in C++
...ng so new at present.
EDIT: To clarify, C++11 is Unicode aware in that it now has support for Unicode literals and Unicode strings. However, the standard library has only limited support for Unicode processing and conversion. For your current needs this may be enough. However, if you need to do a l...
How to create a directory if it doesn't exist using Node.js?
...hrow err;
});
NOTE: You'll need to import the built-in fs module first.
Now here's a little more robust example that leverages native ES Modules (with flag enabled and .mjs extension), handles non-root paths, and accounts for full pathnames:
import fs from 'fs';
import path from 'path';
createD...
Detect if Android device has Internet connection
...eck if there is an active Internet connection is to try and connect
to a known server via http.
public static boolean hasActiveInternetConnection(Context context) {
if (isNetworkAvailable(context)) {
try {
HttpURLConnection urlc = (HttpURLConnection) (new URL("http://www.go...
What are the most interesting equivalences arising from the Curry-Howard Isomorphism?
...ally writing such a function is difficult. I see in your profile that you know Haskell, so maybe you're thinking in algebraic data types and pattern matching? Consider that an uninhabited type must have no constructors and, thus, nothing to pattern match against. You'd have to write a "function" wit...