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ImageView - have height match width?
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Update: Sep 14 2017
According to a comment below, the percent support library is deprecated as of Android Support Library 26.0.0. This is the new way to do it:
<android.support.constraint.ConstraintLayout
android:layout_width="match...
How do you copy the contents of an array to a std::vector in C++ without looping?
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10 Answers
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Play an audio file using jQuery when a button is clicked
...rrentTime. We will use this line in our example audioElement.currentTime = 0;. To achieve .stop() function we first pause the file then reset its time.
We may want to know the length of the audio file and the current playing time. We already learnt .currentTimeabove, to learn its length we use .dur...
Oracle “Partition By” Keyword
...turn every record in the emp table.)
emp_no dept_no DEPT_COUNT
1 10 3
2 10 3
3 10 3 <- three because there are three "dept_no = 10" records
4 20 2
5 20 2 <- two because there are two "dept_no = 20" records
If there was another co...
How to detect page zoom level in all modern browsers?
...p this page to test all these methods of measuring the zoom level.
Edit (2011-12-12): I've added a project that can be cloned: https://github.com/tombigel/detect-zoom
IE8: screen.deviceXDPI / screen.logicalXDPI (or, for the zoom level relative to default zoom, screen.systemXDPI / screen.logicalXD...
How to add a filter class in Spring Boot?
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answered Jun 5 '15 at 5:09
Haim RamanHaim Raman
9,74055 gold badges3434 silver badges5858 bronze badges
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“[notice] child pid XXXX exit signal Segmentation fault (11)” in apache error.log [closed]
...d then look at the backtrace. Do something like this:
$ ps -ef|grep httpd
0 681 1 0 10:38pm ?? 0:00.45 /Applications/MAMP/Library/bin/httpd -k start
501 690 681 0 10:38pm ?? 0:00.02 /Applications/MAMP/Library/bin/httpd -k start
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Now attach gdb to one of the chi...
how do i block or restrict special characters from input fields with jquery?
...ut').on('keypress', function (event) {
var regex = new RegExp("^[a-zA-Z0-9]+$");
var key = String.fromCharCode(!event.charCode ? event.which : event.charCode);
if (!regex.test(key)) {
event.preventDefault();
return false;
}
});
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How expensive is the lock statement?
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Here is an article that goes into the cost. Short answer is 50ns.
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Is it a bad practice to use negative margins in Android?
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In 2010, @RomainGuy (core Android engineer) stated that negative margins had unspecified behavior.
In 2011, @RomainGuy stated that you can use negative margins on LinearLayout and RelativeLayout.
In 2016, @RomainGuy stated that...