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How can I repeat a character in Bash?
...ay matter with large repeat counts).
Summary:
If your repeat count is small, say up to around 100, it's worth going with the Bash-only solutions, as the startup cost of external utilities matters, especially Perl's.
Pragmatically speaking, however, if you only need one instance of repeating ch...
How do I connect to this localhost from another computer on the same network?
... the client (your browser in that case) to understand what symfony.local really means, you need to edit the hosts file on your computer. Everytime you type an URL in your browser, your computer tries to understand what it means! symfony.local doesn't mean anything for a computer. So it will try to r...
Why are there two kinds of functions in Elixir?
...rts with a clean slate and you don't get the variables of different scopes all mixed up together. You have a clear boundary.
We could retrieve the named hello function above as an anonymous function. You mentioned it yourself:
other_function(&hello(&1))
And then you asked, why I cannot s...
Actionbar notification count icon (badge) like Google has
...nflated from XML again. So, the whole setNotifCount(...) is useless. Just call setText(...) on the badge. And you can cast getActionView() to Button directly.
– caw
Mar 1 '14 at 15:30
...
How can I profile C++ code running on Linux?
... one of the suggested ones.
However, if you're in a hurry and you can manually interrupt your program under the debugger while it's being subjectively slow, there's a simple way to find performance problems.
Just halt it several times, and each time look at the call stack. If there is some code th...
What is DOM Event delegation?
...ame effect.
So what's the benefit?
Imagine you now have a need to dynamically add new <li> items to the above list via DOM manipulation:
var newLi = document.createElement('li');
newLi.innerHTML = 'Four';
myUL.appendChild(newLi);
Without using event delegation you would have to "rebind" t...
What's the difference between using “let” and “var”?
...does not create a property on the global object:
var foo = "Foo"; // globally scoped
let bar = "Bar"; // globally scoped
console.log(window.foo); // Foo
console.log(window.bar); // undefined
Redeclaration
In strict mode, var will let you re-declare the same variable in the same scope while let...
Using HTML5/Canvas/JavaScript to take in-browser screenshots
...mplementation of it into sending feedbacks like you described.
The script allows you to create feedback forms which include a screenshot, created on the client's browser, along with the form. The screenshot is based on the DOM and as such may not be 100% accurate to the real representation as it do...
Is R's apply family more than syntactic sugar?
...tem elapsed
7.52 0.00 7.58
Edit 2:
Regarding the usage of parallel packages for R (e.g. rpvm, rmpi, snow), these do generally provide apply family functions (even the foreach package is essentially equivalent, despite the name). Here's a simple example of the sapply function in snow:
...
Using .NET, how can you find the mime type of a file based on the file signature not the extension
...
In Urlmon.dll, there's a function called FindMimeFromData.
From the documentation
MIME type detection, or "data sniffing," refers to the process of determining an appropriate MIME type from binary data. The final result depends on a combination of server...