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How do I use the new computeIfAbsent function?
...ava.util.Map;
import java.util.concurrent.ConcurrentHashMap;
public class Test {
public static void main(String[] s) {
Map<String, Boolean> whoLetDogsOut = new ConcurrentHashMap<>();
whoLetDogsOut.computeIfAbsent("snoop", k -> f(k));
whoLetDogsOut.computeI...
How can I develop for iPhone using a Windows development machine?
...the best. Unless your app is of the HelloWorld variety, you really need to test and debug.
– Wytze
Mar 16 '12 at 8:25
4
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Why is it a bad practice to return generated HTML instead of JSON? Or is it?
...g earlier (before your ajax comes back).
– FailedUnitTest
May 15 '19 at 12:18
add a comment
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Are SVG parameters such as 'xmlns' and 'version' needed?
... to both answers, but I have no points, I'm adding a new answer.
In recent tests on Chrome (Version 63.0.3239.132 (Official Build) (64-bit Windows)), I have found that:
For inline SVG that is directly entered into the HTML file, via text editor or javascript and elm.innerHTML, the xmlns attributes...
How to loop through array in jQuery?
...ed in the example above. A for loop works like this: 1. Initialization, 2. Test (terminate if false), 3. Body, 4. Update, 5. Return to Step 2. The result of the update expression isn't used for anything.
– T.J. Crowder
Oct 7 '17 at 7:04
...
Servlet for serving static content
...2e%2e/mysecretfile.txt. This request produces files/../mysecretfile.txt. I tested it on Tomcat 7.0.55. They call it a directory climbing: owasp.org/index.php/Path_Traversal
– Cristian Arteaga
Aug 4 '18 at 0:37
...
How to expire session due to inactivity in Django?
...E_AT_BROWSER_CLOSE = True
SESSION_COOKIE_AGE = 10 # set just 10 seconds to test
SESSION_SAVE_EVERY_REQUEST = True
I didn't check other browsers but chrome.
1. A session expired when I closed a browser even if SESSION_COOKIE_AGE set.
2. Only when I was idle for more than 10 seconds, A session expir...
postgresql return 0 if returned value is null
...he second is if there are NULL values in the query.
For all versions I've tested, postgres and mysql will ignore all NULL values when averaging, and it will return NULL if there is nothing to average over. This generally makes sense, as NULL is to be considered "unknown". If you want to override t...
Difference between Destroy and Delete
...ased on the :dependent option passed into the association. However, during testing, I found the following side effect where callbacks were only ran for delete and not delete_all
dependent: :destroy Example:
class Parent < ApplicationRecord
has_many :children,
before_remove: -> (_) {...
How can I push a local Git branch to a remote with a different name easily?
... branch name I've checked out. I might just want to git push buildserver .:test_this where the . shall be the local branch name which I don't necessarily know. I could look it up, sure, but if there was a short hand, like the dot, for that, it'd be cool.
– Frederick Nord
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