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Give examples of functions which demonstrate covariance and contravariance in the cases of both over
...List<? super String> contravariantList = aList;
You can now access all methods of covariantList that doesn't take a generic parameter (as it must be something "extends Object"), but getters will work fine (as the returned object will always be of type "Object")
The opposite is true for cont...
How to remove the last character from a string?
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replace will replace all instances of a letter. All you need to do is use substring():
public String method(String str) {
if (str != null && str.length() > 0 && str.charAt(str.length() - 1) == 'x') {
str = str.subs...
Github Windows 'Failed to sync this branch'
...to those stuck: If GitHub for Windows is crashing but in Git Shell you see all green and this git status message "Your branch is ahead of 'origin/master' by 1 commit. (use "git push" to publish your local commits)". Entering git push fixed this for me. I restarted GitHub for Windows and sync finall...
How can I install pip on Windows?
pip is a replacement for easy_install . But should I install pip using easy_install on Windows? Is there a better way?
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Why use make over a shell script?
...t would be a lot more work (explicitly checking the last-modified dates on all the files, etc.) The only obvious alternative with a shell script is to rebuild everything every time. For tiny projects this is a perfectly reasonable approach, but for a big project a complete rebuild could easily take ...
Single Line Nested For Loops
...ertools.product, which returns an iterable yielding tuples of values from all the iterables you pass it. That is, itertools.product(A, B) yields all values of the form (a, b), where the a values come from A and the b values come from B. For example:
import itertools
A = [50, 60, 70]
B = [0.1, 0.2...
Identifying and removing null characters in UNIX
...l with I/O redirection (<, >, …) anywhere in the command line, actually.
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How to change file encoding in NetBeans?
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In NetBeans model all project files should have the same encoding. The answer is that you can't do that in Netbeans.
If you are working in Netbeans you should consider to convert all files to a single encoding using other tools.
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How to reposition Chrome Developer Tools
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If you can't open the dock at all, try Ctrl+Shift+I -- but if your window is a popup, I don't think docking even works.
– Noumenon
Oct 4 '16 at 13:35
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How does this milw0rm heap spraying exploit work?
I usually do not have difficulty to read JavaScript code but for this one I can’t figure out the logic. The code is from an exploit that has been published 4 days ago. You can find it at milw0rm .
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