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Java Date vs Calendar
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The best way for new code (if your policy allows third-party code) is to use the Joda Time library.
Both, Date and Calendar, have so many design problems that neither are good solutions for new code.
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ERROR: permission denied for sequence cities_id_seq using Postgres
I'm new at postgres (and at database info systems all in all). I ran following sql script on my database:
4 Answers
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jQuery validate: How to add a rule for regular expression validation?
... "regex",
function(value, element, regexp) {
var re = new RegExp(regexp);
return this.optional(element) || re.test(value);
},
"Please check your input."
);
now all you need to do to validate against any regex is this:
$("#Textbox").rules("add", { r...
Converting ISO 8601-compliant String to java.util.Date
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The way that is blessed by Java 7 documentation:
DateFormat df1 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
String string1 = "2001-07-04T12:08:56.235-0700";
Date result1 = df1.parse(string1);
DateFormat df2 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSXXX");
String string2 = ...
What is SuppressWarnings (“unchecked”) in Java?
... that don't store a value.
private static final Optional<?> EMPTY = new Optional<>();
public static<T> Optional<T> empty() {
@SuppressWarnings("unchecked")
Optional<T> t = (Optional<T>) EMPTY;
return t;
}
This cast is safe, as the value stored in an...
Difference between float and decimal data type
... extended precision integers. It may prove prudent for Oracle to support a new form of DECIMAL in the future covering 77 digits vs 65. I would estimate a 5-10X performance improvement using hardware instead of software. 2^256 = 115,792,089,237,316,195,423,570,985,008,687,907,853,269,984,665,640,564...
Difference between File.separator and slash in paths
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In such a country you would make use of the new org.apache.chicken.elevators.OperatorUtility class, which embeds all this craziness for your convenience.
– Brain
Jun 11 '15 at 12:31
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What happens to git commits created in a detached HEAD state?
...commits, and the "lost" commit should be in there. You can make it into a new branch. For example, if the SHA-1 is ba5a739, then you can make a new branch named "new-branch" at the old commit with:
git branch new-branch ba5a739
Note that "lost" commits will get deleted when the database is prun...
Is there a way to access an iteration-counter in Java's for-each loop?
...gt; Iterable<Index<T>> index(final T[] array) {
return new Iterable<Index<T>>() {
public Iterator<Index<T>> iterator() {
return new Iterator<Index<T>>() {
index = 0;
public boo...
Drawing an image from a data URL to a canvas
... by setting the src of the image to your data URL. For example:
var img = new Image;
img.src = strDataURI;
The drawImage() method of HTML5 Canvas Context lets you copy all or a portion of an image (or canvas, or video) onto a canvas.
You might use it like so:
var myCanvas = document.getElementB...