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M_PI works with math.h but not with cmath in Visual Studio
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i confirm that hacking /Y- worked for me, for C code #include <math.h>
– aka.nice
Oct 16 '19 at 16:34
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Plurality in user messages
... just mistakes).
I once wrote an app without using a single dialog or confirmation message. It took some serious thinking and was significantly harder to implement than using confirmation-type messages. But the end result was rather nice to use according to its end-users.
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What does .SD stand for in data.table in R
...history of baseball
fkt = c('teamIDBR', 'teamIDlahman45', 'teamIDretro')
# confirm that they're stored as `character`
Teams[ , sapply(.SD, is.character), .SDcols = fkt]
# teamIDBR teamIDlahman45 teamIDretro
# TRUE TRUE TRUE
If you're confused by the use of sapply here,...
Detect If Browser Tab Has Focus
...it this way (Reference http://www.w3.org/TR/page-visibility/):
window.onload = function() {
// check the visiblility of the page
var hidden, visibilityState, visibilityChange;
if (typeof document.hidden !== "undefined") {
hidden = "hidden", visibilityChange...
What does a double * (splat) operator do
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Thanks, that's the confirmation I was looking for.
– Qortex
Oct 25 '19 at 7:27
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libxml/tree.h no such file or directory
...mlink to it in /usr/include. I haven't tried installing libxml2 so I can't confirm default behavior. But yes, it's much better to link it that way.
– Matt Ball
Sep 16 '09 at 13:59
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How do you add an in-app purchase to an iOS application?
...nt, log in as the test user that we just created. Next,when it asks you to confirm the purchase of 99¢ or whatever you set the price tier too, TAKE A SCREEN SNAPSHOT OF IT this is what your going to use for your screenshot for review on App Store Connect. Now cancel the payment.
Now, go to App Stor...
How to save an HTML5 Canvas as an image on a server?
... send it to your server as an ajax request does this method require user's confirming? Or I can silently send image from canvas to server?
– MyTitle
Apr 15 '13 at 11:44
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Android Studio Stuck at Gradle Download on create new project
...answered May 16 '13 at 6:59
JNI_OnLoadJNI_OnLoad
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Swap key with value JSON
... Seems the better solution for nowdays (2019)! Somebody can confirm, is it? Performance good? Semantic is perfect: we can see that is really a simple "map and swap" solution.
– Peter Krauss
Jan 3 '19 at 17:41
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