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Why is 128==128 false but 127==127 is true when comparing Integer wrappers in Java?
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When you compile a number literal in Java and assign it to a Integer (capital I) the compiler emits:
Integer b2 =Integer.valueOf(127)
This line of code is also generated when you use autoboxing.
valueOf is implemented such that certain numbers are "pooled", and i...
Java 8 stream reverse order
... .map(i -> to - i + from - 1);
}
This avoids boxing and sorting.
For the general question of how to reverse a stream of any type, I don't know of there's a "proper" way. There are a couple ways I can think of. Both end up storing the stream elements. I don't know of a way to ...
What should every JavaScript programmer know? [closed]
...ul, but they are often hiding the sometimes-ugly details of how JavaScript and the DOM actually work from you. If your aim is to be able to say “I know JavaScript”, then investing a lot of time in a framework is opposed to that.
Here are some JavaScript language features that you should know to...
Webdriver Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms
I have box where I run tests. It seems like Jenkins would ssh in and execute commands described in the specific job that's running.
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Javascript Confirm popup Yes, No button instead of OK and Cancel
Javascript Confirm popup, I want to show Yes, No button instead of OK and Cancel.
9 Answers
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Really weird eclipse keyboard behavior/bug?
...os on Mac Snow Leopard. I don't know why but all of a sudden my arrow keys and delete button start not working only on Eclipse (so Eclipse ignores them) but the rest of the buttons works just fine. There is no exception/error thrown anywhere on the screen. I don't exactly know how to reproduce this ...
Purpose of ESI & EDI registers?
What is the actual purpose and use of the EDI & ESI registers in assembler?
5 Answers
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Why do I need to do `--set-upstream` all the time?
...t branch. Or, to push to the current branch to a branch of the same name (handy for an alias):
git push -u origin HEAD
You only need to use -u once, and that sets up the association between your branch and the one at origin in the same way as git branch --set-upstream does.
Personally, I think i...
Do sessions really violate RESTfulness?
...client to server must contain all of the
information necessary to understand the request, and cannot take
advantage of any stored context on the server. Session state is
therefore kept entirely on the client.
according to the Fielding dissertation.
So server side sessions violate the state...
Calculate text width with JavaScript
...IV styled with the following styles. In your JavaScript, set the font size and attributes that you are trying to measure, put your string in the DIV, then read the current width and height of the DIV. It will stretch to fit the contents and the size will be within a few pixels of the string rendered...