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How can I check whether an array is null / empty?
...mpty" here has no official meaning. I'm choosing to define empty as having 0 elements:
arr = new int[0];
if (arr.length == 0) {
System.out.println("array is empty");
}
An alternative definition of "empty" is if all the elements are null:
Object arr[] = new Object[10];
boolean empty = true;
for...
Fastest way to check if a file exist using standard C++/C++11/C?
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20 Answers
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Active
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CSS force image resize and keep aspect ratio
...
img {
display: block;
max-width:230px;
max-height:95px;
width: auto;
height: auto;
}
<p>This image is originally 400x400 pixels, but should get resized by the CSS:</p>
<img width="400" height="400" src="http://i.stack.imgur.com/aEEk...
How to get key names from JSON using jq
curl http://testhost.test.com:8080/application/app/version | jq '.version' | jq '.[]'
7 Answers
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NumPy: function for simultaneous max() and min()
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50
Is there a function in the numpy API that finds both max and min with only a single pass thro...
UIButton: how to center an image and a text using imageEdgeInsets and titleEdgeInsets?
...ersions below:
// the space between the image and text
CGFloat spacing = 6.0;
// lower the text and push it left so it appears centered
// below the image
CGSize imageSize = button.imageView.frame.size;
button.titleEdgeInsets = UIEdgeInsetsMake(
0.0, - imageSize.width, - (imageSize.height + spa...
Iterating over Java collections in Scala
...MutableIterator.Wrapper
– samg
Dec 30 '09 at 23:21
37
This answer is obsolete in Scala 2.8; see s...
Cutting the videos based on start and end time using ffmpeg
...ing an edit list. In other words, if the closest keyframe before 3s is at 0s then it will copy the video starting at 0s and use an edit list to tell the player to start playing 3 seconds in.
If you are using the latest ffmpeg from git master it will do this using an edit list when invoked using th...
How to select the first element in the dropdown using jquery?
...one drop down list at a time as coded below:
var myDDL = $('myID');
myDDL[0].selectedIndex = 0;
Take a look at this post on how to set based on value, its interesting but won't help you for this specific issue:
Change the selected value of a drop-down list with jQuery
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Android ViewPager - Show preview of page on left and right
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10 Answers
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