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What does the git index contain EXACTLY?
...ns an article on what an index includes:
The index is a binary file (generally kept in .git/index) containing a sorted list of path names, each with permissions and the SHA1 of a blob object; git ls-files can show you the contents of the index:
$ git ls-files --stage
100644 63c918c667fa005ff12ad89...
How do I show/hide a UIBarButtonItem?
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Save your button in a strong outlet (let's call it myButton) and do this to add/remove it:
// Get the reference to the current toolbar buttons
NSMutableArray *toolbarButtons = [self.toolbarItems mutableCopy];
// This is how you remove the button from the toolbar and ...
Bash foreach loop
... input runs the cat program with the input lines as argument(s).
If you really want to do this in a loop, you can:
for fn in `cat filenames.txt`; do
echo "the next file is $fn"
cat $fn
done
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What version of javac built my jar?
...ersion the class has been compiled FOR, not what version compiled it. Java allows you to compile code so that they're compatible with earlier versions of Java. However, this only applies to byte code and format. It will happily compile code that references JDK 6 libraries into a JDK 5 format, for ex...
Is System.nanoTime() completely useless?
...cific counter. Now consider the following case I use to measure time of a call:
15 Answers
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Check that Field Exists with MongoDB
So I'm attempting to find all records who have a field set and isn't null.
4 Answers
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Does the 'mutable' keyword have any purpose other than allowing the variable to be modified by a con
...able of a class with the mutable keyword. As far as I can see it simply allows you to modify a variable in a const method:
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adding multiple entries to a HashMap at once in one statement
... 2016) as follow:
Map<String, Integer> cities = Map.of("Brussels", 1_139000, "Cardiff", 341_000);
The var-args case for Map is a little bit harder, you need to have both keys and values, but in Java, methods can’t have two var-args parameters. So the general case is handled by taking a va...
What does the red exclamation point icon in Eclipse mean?
...Build path"
Then select "Configure Build Path"
Click on "Libraries"
Remove all the libraries which were referring to old path
Then, the exclamation symbol on the "Project name" was removed.
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Twitter Bootstrap Tabs: Go to Specific Tab on Page Reload or Hyperlink
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Thanks for the tip! This worked great with one small problem. Refreshing the page, would not take it to the correct tab. Hitting Ctrl+F5 would. I modified the code to the following: ` $(document).ready(function(){ function getUrlVars() { var vars = {}; ...