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How to detect when an Android app goes to the background and come back to the foreground
...le UI, a callback is triggered. The callback, which you can implement in a custom class, is called ComponentCallbacks2 (yes, with a two). This callback is only available in API Level 14 (Ice Cream Sandwich) and above.
You basically get a call to the method:
public abstract void onTrimMemory (int ...
How to check if a DateTime occurs today?
...ame name, you'd have to wonder why he would ask StackOverflow how to use a custom class he created and expect us to magically know how it worked. ;)
– Brian Schroth
Oct 21 '09 at 16:04
...
The Definitive C Book Guide and List
...an download the latest version as pdf here: icube-icps.unistra.fr/img_auth.php/d/db/ModernC.pdf (BTW, seems the author is updating & publish the book at above link as need)
– Eric Wang
Aug 10 '19 at 18:36
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When should I use a composite index?
... it compares 5 ways of doing lat/lng searches: http://mysql.rjweb.org/doc.php/latlng#representation_choices (It references the link given above as one of the 5.) One of the other ways is this, and it points out that they are optimal for the particular case:
INDEX(geolat, geolng),
INDEX(geolng, g...
HTML5 Canvas vs. SVG vs. div
...stic.
Here are some interesting benchmarks:
http://svbreakaway.info/tp.php#jan21a
http://www.eleqtriq.com/2010/02/canvas-svg-flash/
http://smus.com/canvas-vs-svg-performance/
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How to view DLL functions?
...
You may try the Object Browser in Visual Studio.
Select Edit Custom Component Set. From there, you can choose from a variety of .NET, COM or project libraries or just import external dlls via Browse.
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Can't get rid of header X-Powered-By:Express
...onally) just change (set) the X-powered-by header to something much cooler/custom like this:
app.use(function (req, res, next) {
res.header("X-powered-by", "Blood, sweat, and tears")
next()
})
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Set CSS property in Javascript?
...ust for people who want to do the same thing in 2018
You can assign a CSS custom property to your element (through CSS or JS) and change it:
Assigment through CSS:
element {
--element-width: 300px;
width: var(--element-width, 100%);
}
Assignment through JS
ELEMENT.style.setProperty('--ele...
Text size and different android screen sizes
...ext size for different screen sizes. I try to use 'sp' as size units in my custom style:
11 Answers
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UTF-8: General? Bin? Unicode?
...se read the following post from MySQL forums:
http://forums.mysql.com/read.php?103,187048,188748
As for utf8_bin:
Both utf8_general_ci and utf8_unicode_ci perform case-insensitive comparison. In constrast, utf8_bin is case-sensitive (among other differences), because it compares the binary values o...