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Determine file creation date in Java
...n time and discusses obtaining it via the new nio classes - it seems right now in JDK7's implementation you're out of luck. Addendum: same behaviour is in OpenJDK7.
On Unix filesystems you cannot retrieve the creation timestamp, you simply get a copy of the last modification time. So sad, but unfor...
Can Selenium interact with an existing browser session?
Does anybody know if Selenium (WebDriver preferably) is able to communicate with and act through a browser that is already running before launching a Selenium Client?
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Split Strings into words with multiple word boundary delimiters
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Now if only I could remember the difference between \w, \W, \s, and \S. Whoever thought that the capitalization of a flag should invert its meaning needs to be shot through the head.
– ArtOfWarfare
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Scanner vs. StringTokenizer vs. String.Split
I just learned about Java's Scanner class and now I'm wondering how it compares/competes with the StringTokenizer and String.Split. I know that the StringTokenizer and String.Split only work on Strings, so why would I want to use the Scanner for a String? Is Scanner just intended to be one-stop-shop...
How do you downgrade rubygems?
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Updated November 2011: Now that RVM's out, try running rvm install rubygems <version>.
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How is null + true a string?
... fine, but it's not used for a null literal, because the compiler doesn't know to look in Foo. It only knows to consider string because it's a predefined operator explicitly listed in the spec. (In fact, it's not an operator defined by the string type... 1) That means that this will fail to compile:...
#ifdef replacement in the Swift language
.... Here's an example:
#if DEBUG
let a = 2
#else
let a = 3
#endif
Now, you must set the "DEBUG" symbol elsewhere, though. Set it in the "Swift Compiler - Custom Flags" section, "Other Swift Flags" line. You add the DEBUG symbol with the -D DEBUG entry.
As usual, you can set a different val...
Why should I capitalize my SQL keywords? [duplicate]
... own identifiers and immediate values. This of course matters a bit less, nowadays with the omnipresent syntax hi-lighting in SQL IDEs / editors. This said, while this convention is a good thing for DML/DDL such as SELECT/INSERT queries and such, it can make for heavy look of Procedural extensions...
Is there a way to get a collection of all the Models in your Rails app?
...ection to search for every classes that extends ActiveRecord::Base. Don't know how you can list all the classes though...
EDIT: Just for fun, I found a way to list all classes
Module.constants.select { |c| (eval c).is_a? Class }
EDIT: Finally succeeded in listing all models without looking at di...
Abandoning changes without deleting from history
... -c option to hg heads, but it won't show up by default and hg merge will know not try to merge with the closed head.
You will need to use hg push --force the first time you push this closed head to another repository since you are actually create additional heads in the remote repository when you ...