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How do I undo the most recent local commits in Git?
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Undo a commit and redo
$ git commit -m "Something terribly misguided" # (1)
$ git reset HEAD~ # (2)
<< edit files as necessary >> # (3)
$ git add...
Why can't decimal numbers be represented exactly in binary?
...e the == operator to compare it to another floating-point number. I understand the principles behind floating-point representation.
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Why do I need to override the equals and hashCode methods in Java?
...n conjunction with all hash-based collections, including HashMap, HashSet, and Hashtable.
Let's try to understand it with an example of what would happen if we override equals() without overriding hashCode() and attempt to use a Map.
Say we have a class like this and that two objects of MyClass are...
Maximum number of records in a MySQL database table
...utoincrement field. What would happen if I add milions of records? How to handle this kind of situations?
Thx!
8 Answers
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Android ADB device offline, can't issue commands
I can't connect to my device anymore using ADB through the command line or in Eclipse .
58 Answers
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Using node.js as a simple web server
...pm install http-server -g
Now you can run a server via the following commands:
$ cd MyApp
$ http-server
If you're using NPM 5.2.0 or newer, you can use http-server without installing it with npx. This isn't recommended for use in production but is a great way to quickly get a server running ...
Using node-inspector with Grunt tasks
...ass the grunt script to node explicitly:
node-debug $(which grunt) task
and put a debugger; line in your task. node-inspector will then open a browser with debugging tools.
Edit 28 Feb 2014
node-inspector has added the command node-debug, which launches node in a --debug state and opens the bro...
How can I get a precise time, for example in milliseconds in Objective-C?
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NSDate and the timeIntervalSince* methods will return a NSTimeInterval which is a double with sub-millisecond accuracy. NSTimeInterval is in seconds, but it uses the double to give you greater precision.
In order to calculate milli...
How can I trim beginning and ending double quotes from a string?
I would like to trim a beginning and ending double quote (") from a string.
How can I achieve that in Java? Thanks!
17 An...
Data structure for loaded dice?
...e. for a fixed set of probabilities) so that I can efficiently simulate a random roll of the die.
4 Answers
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