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Java's L number (long) specification
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There are specific suffixes for long (e.g. 39832L), float (e.g. 2.4f) and double (e.g. -7.832d).
If there is no suffix, and it is an integral type (e.g. 5623), it is assumed to be an int. If it is not an integral type (e.g. 3.14159), it is assumed to be a double.
In all...
Stream vs Views vs Iterators
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182
First, they are all non-strict. That has a particular mathematical meaning related to functions,...
Variable length (Dynamic) Arrays in Java
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123
Yes: use ArrayList.
In Java, "normal" arrays are fixed-size. You have to give them a size and...
How to print the contents of RDD?
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240
If you want to view the content of a RDD, one way is to use collect():
myRDD.collect().foreac...
How to read XML using XPath in Java
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This will get you the second:
/howto/topic[@name='PowerBuilder']/url[2]/text()
You get that with this code:
expr.evaluate(doc, XPathConstants.STRING);
If you don't know how many URLs are in a given node, then you should rather do something like this:
XPathExpression expr = xpath.compile(...
Two submit buttons in one form
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answered Feb 13 '09 at 21:48
GregGreg
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How can I access an object property named as a variable in php?
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222
Since the name of your property is the string '$t', you can access it like this:
echo $object...
Get first key in a (possibly) associative array?
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21 Answers
21
Active
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Git: Correct way to change Active Branch in a bare repository?
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282
If you have access to the remote bare repo, this article suggests:
git symbolic-ref HEAD refs...
Postgres and Indexes on Foreign Keys and Primary Keys
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420
PostgreSQL automatically creates indexes on primary keys and unique constraints, but not on the...