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How and where are Annotations used in Java?
...cribe other meta-objects. Meta-objects are classes, fields and methods. Asking an object for its meta-object (e.g. anObj.getClass() ) is called introspection. The introspection can go further and we can ask a meta-object what are its annotations (e.g. aClass.getAnnotations). Introspection and annota...
How to format a number as percentage in R?
One of the things that used to perplex me as a newby to R was how to format a number as a percentage for printing.
10 Answe...
How to rename a table in SQL Server?
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To rename a table in SQL Server, use the sp_rename command:
exec sp_rename 'schema.old_table_name', 'new_table_name'
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How to fix “Headers already sent” error in PHP
When running my script, I am getting several errors like this:
11 Answers
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Simplest way to read json from a URL in java
... question but what is the simplest way to read and parse JSON from URL in Java ?
11 Answers
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How to var_dump variables in twig templates?
View layer pattern where you only present what you have been given is fine and all, but how do you know what is available? Is there a "list all defined variables" functionality in TWIG? Is there a way to dump a variable?
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How to count the number of true elements in a NumPy bool array
...number of elements whose values are True . Is there a NumPy or Python routine dedicated for this task? Or, do I need to iterate over the elements in my script?
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How do I copy an object in Java?
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Create a copy constructor:
class DummyBean {
private String dummy;
public DummyBean(DummyBean another) {
this.dummy = another.dummy; // you can access
}
}
Every object has also a clone method which can be used to copy the object, but don't use it. It's way too easy to...
Max parallel http connections in a browser?
I am creating some suspended connections to an HTTP server (comet, reverse ajax, etc). It works ok, but I see the browser only allows two suspended connections to a given domain simultaneously. So if a user is looking at my website in Tab1 of their browser, then also tries loading it in Tab2, they'v...
How to change font size in Eclipse for Java text editors?
I have just tried to change my font size in Eclipse 3.6.0 in the following way:
18 Answers
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