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Android; Check if file exists without creating a new one
...e, you are not creating a new File, it's just creating an object reference for that file and testing if it exists or not.
File file = new File(filePath);
if(file.exists())
//do something
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How many random elements before MD5 produces collisions?
I've got an image library on Amazon S3. For each image, I md5 the source URL on my server plus a timestamp to get a unique filename. Since S3 can't have subdirectories, I need to store all of these images in a single flat folder.
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What are the best practices for using Assembly Attributes?
... linking one solution wide assembly info file. What are the best practices for doing this? Which attributes should be in solution wide file and which are project/assembly specific?
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How can I check if a value is a json object?
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Might also need to use a try / catch for exceptions if it is possible that parseJSON is going to be dealing with something other than JSON values (i.e. HTML)
– acorncom
Mar 22 '12 at 22:44
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How can I mask a UIImageView?
...ourImageView.layer.mask = mask;
yourImageView.layer.masksToBounds = YES;
For Swift 4 and plus follow code below
let mask = CALayer()
mask.contents = [ UIImage(named: "right_challenge_bg")?.cgImage] as Any
mask.frame = CGRect(x: 0, y: 0, width: leftBGImage.frame.size.width, height: leftBGImage.fr...
Removing multiple classes (jQuery)
...e all items all class
const items = document.querySelectorAll('item');
for (let i = 0; i < items.length; i++) {
items[i].className = '';
}
remove multi class
// only remove all class of first item
const item1 = document.querySelector('item');
item1.className = '';
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Is GET data also encrypted in HTTPS?
...e public content from a MITM. In any event, it's best to let Google answer for themselves.
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Browse the files created on a device by the iOS application I'm developing, on workstation?
.... Click the down pointing arrow to download the data, and it'll prompt you for somewhere to save it.
In Xcode 5, listed under your device in Organizer, click on "Applications" and you can see "Data files in Sandbox" in the bottom half of the window.
In Xcode 6, go to Window -> Devices, select t...
Ruby arrays: %w vs %W
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Your example show double quotes for %w too. Is it correct?
– Foton
Dec 3 '16 at 14:02
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data type not understood
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