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Java Generics: Cannot cast List to List? [duplicate]
...t;? extends Tree> b1 = a1;
... because then you can only fetch things from b1, and they're guaranteed to be compatible with Tree. You can't call b1.add(...) precisely because the compiler won't know whether it's safe or not.
Have a look at this section of Angelika Langer's Java Generics FAQ fo...
Fatal error: unexpectedly found nil while unwrapping an Optional values [duplicate]
...
Almost certainly, your reuse identifier "title" is incorrect.
We can see from the UITableView.h method signature of dequeueReusableCellWithIdentifier that the return type is an Implicitly Unwrapped Optional:
func dequeueReusableCellWithIdentifier(identifier: String!) -> AnyObject! // Used by t...
converting double to integer in java
...nding, there will not be any fractional parts remaining.
Here are the docs from Math.round(double):
Returns the closest long to the argument. The result is rounded to an integer by adding 1/2, taking the floor of the result, and casting the result to type long. In other words, the result is equal t...
how to view the contents of a .pem certificate
... am using Java keytool . I have exported a self-signed .pem certificate from my keystore. Is there a command to view the certificate details directly from the .pem file (not of the certificate in the keystore)?
...
Get screen width and height in Android
...e answer by parag and SpK to align with current SDK backward compatibility from deprecated methods:
int Measuredwidth = 0;
int Measuredheight = 0;
Point size = new Point();
WindowManager w = getWindowManager();
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
w.getDefault...
Which characters need to be escaped when using Bash?
... not sure what you mean. With those sed commands the input string is taken from stdin.
– Jo So
Aug 16 '17 at 16:12
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Why is an array not assignable to Iterable?
...h there are a gazillion operations that one would want to use an array for from the start. Oh, that's right, arrays were the only strongly typed collections before generics came along as a sorry hindsight.
– fatuhoku
Nov 28 '11 at 12:02
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Excluding directory when creating a .tar.gz file
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I get tar: Error exit delayed from previous errors. in macos
– prayagupd
Jun 28 '18 at 23:32
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switch() statement usage
...oshuaUlrich ...which benchmark function are you using? Not the obvious one from the "benchmark" package it seems?
– Tommy
Oct 19 '11 at 18:52
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Git fails when pushing commit to github
...o git over ssh, and push it to github. Then when you try to do a push/pull from the original server it should work over https. (since it is a much smaller amount of data than an original push).
Hope this helps.
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