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What is tail call optimization?
...ion because the calling function will simply return the value that it gets from the called function. The most common use is tail-recursion, where a recursive function written to take advantage of tail-call optimization can use constant stack space.
Scheme is one of the few programming languages tha...
Moment.js - how do I get the number of years since a date, not rounded up?
...person's age using Moment.js , but I'm finding that the otherwise useful fromNow method rounds up the years. For instance, if today is 12/27/2012 and the person's birth date is 02/26/1978, moment("02/26/1978", "MM/DD/YYYY").fromNow() returns '35 years ago'. How can I make Moment.js ignore the n...
When do you use Java's @Override annotation and why?
...In case anyone else got here because of the apparently undocumented change from 1.5 to 1.6 for @Overrides on methods coming from interfaces, bugs.sun.com/bugdatabase/view_bug.do?bug_id=5008260 seems to be the corresponding bug. (Thanks for pointing it out, Dave L.!)
– Henrik He...
What is the overhead of creating a new HttpClient per call in a WebAPI client?
...t with a new HttpClient requires re-establishing a new TCP/IP connection.
From my tests, using plain HTTP on a LAN, the performance hit is fairly negligible. I suspect this is because there is an underlying TCP keepalive that is holding the connection open even when HttpClientHandler tries to clos...
Real mouse position in canvas [duplicate]
...ientX - rect.left,
y: evt.clientY - rect.top
};
}
Just call it from your event with the event and canvas as arguments. It returns an object with x and y for the mouse positions.
As the mouse position you are getting is relative to the client window you'll have to subtract the position o...
Is there a read-only generic dictionary available in .NET?
...ence to a dictionary in my read only property. How do I prevent consumers from changing my data? If this were an IList I could simply return it AsReadOnly . Is there something similar I can do with a dictionary?
...
Javascript object Vs JSON
...JavaScript.
Here's a story. Let's imagine you've purchased some furniture from a store, and you want it delivered. However the only one left in stock is the display model, but you agree to buy it.
In the shop, the chest-of-drawers you've purchased is a living object:
var chestOfDrawers = {
co...
Why does typeof array with objects return “object” and not “array”? [duplicate]
...ex, yes, the other can give you false if you're checking an array you got from an <iframe>.
– gdoron is supporting Monica
Feb 13 '14 at 19:45
6
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Why can't I use float value as a template parameter?
...
Please provide a link to or copy of relevant section from the standard
– thecoshman
Jul 17 '12 at 8:37
2
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ScalaTest in sbt: is there a way to run a single test without tags?
...
Just to clarify, if you run it from the command line, it should be as single argument: sbt "testOnly *MySuite -- -z foo"
– Sogartar
Jan 11 '17 at 17:17
...