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How does Duff's device work?
...he article on Wikipedia on the Duff's device , and I don't get it. I am really interested, but I've read the explanation there a couple of times and I still don't get it how the Duff's device works.
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What is the difference between \r and \n?
...ngs like \a "bell", \b "backspace" (not to be confused with "delete"), and all the other control characters needed to communicate with a tty.
– erjiang
Aug 14 '09 at 19:48
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How do I get the RootViewController from a pushed controller?
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:) ty. It still seems hacky - :) I really wanted an "official" member to do the job, something like self.navigationController.rootViewController, but alas, no such thing..
– bobobobo
Nov 25 '09 at 2:21
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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...
Identifying and removing null characters in UNIX
...l with I/O redirection (<, >, …) anywhere in the command line, actually.
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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 do you round a number to two decimal places in C#?
...ults to MidPointRounding.ToEven (aka "Bankers Rounding") is because the we all learned to round in school where .5 rounds up causes too much rounding up. This is a problem when dealing with money, tax calculations, etc.
– asporter
Nov 11 '16 at 19:36
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How to disable scrolling in UITableView table when the content fits on the screen
...h, not subclassed from UITableViewController ) that 80% of the time are small and will fit on the screen. When the table fits on the screen, I'd like to disable scrolling, to make it a bit cleaner. But if the table goes off the screen (when rows are later added to it), I'd like to enable scrollin...