Hack Underflow

70 votes 21 answers

array.contains(obj) in JavaScript What is the most concise and efficient way to find out if a JavaScript array...

64 votes 14 answers

“Debug certificate expired” error in Eclipse Androi... I am using Eclipse Android plugins to build a project, but I am getting this...

53 votes 30 answers

Is Java “pass-by-reference”? I always thought Java was pass-by-reference; however I've seen a couple of b...

51 votes 6 answers

Reference - What does this symbol mean in PHP? This is a collection of questions that come up every now and then about synt...

51 votes 8 answers

event.preventDefault() vs. return false When I want to prevent other event handlers from executing after a certain e...

49 votes 3 answers

How to remove a property from a javascript object Say I create an object thus: What is the best way to remove the property 'r...

48 votes 21 answers

Differences between HashMap and Hashtable? What is the difference between a HashMap and a Hashtable in Java? Which is ...

36 votes 17 answers

How do I add an empty directory to a git repository... How do I convince git that I really do want an empty directory?...

31 votes 22 answers

Read/convert an InputStream to a String If you have java.io.InputStream object, how should you process that object a...

22 votes 9 answers

Change an input's HTML5 placeholder color with CSS Chrome supports the placeholder attribute on input[type=text] elements (othe...

22 votes 6 answers

Removing untracked files from your Git working copy... How do you delete untracked files from your Git working copy?...

18 votes 14 answers

Using Git with Visual Studio As a long-time Visual SourceSafe user (and hater) I was discussing switching...

18 votes 19 answers

CSS rule to disable text selection highlighting For anchors that act like buttons (for example, Questions, Tags, Users, etc....

15 votes 11 answers

Regular expression to match string not containing a... I know it is possible to match for the word and using tools options reverse ...

2 votes 19 answers

Can I comment a JSON file? Can I comment a JSON file? If so, how?...