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How do you know a variable type in java?
...s very bad , So code...)
How to get variable's type?
Up's :
String str = "test";
String type = str.getClass().getName();
value: type = java.lang.String
this method :
str.getClass().getSimpleName();
value:String
now example:
Object o = 1;
o.getClass().getSimpleName();
value:Integer
...
MySQL: What's the difference between float and double?
...
Perhaps this example could explain.
CREATE TABLE `test`(`fla` FLOAT,`flb` FLOAT,`dba` DOUBLE(10,2),`dbb` DOUBLE(10,2));
We have a table like this:
+-------+-------------+
| Field | Type |
+-------+-------------+
| fla | float |
| flb | float |
| dba ...
Maximum concurrent Socket.IO connections
...enchmarking/
I wondered the same question, so I ended up writing a small test (using XHR-polling) to see when the connections started to fail (or fall behind). I found (in my case) that the sockets started acting up at around 1400-1800 concurrent connections.
This is a short gist I made, similar ...
Safe integer parsing in Ruby
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test in Ruby 1.9. Integer(:foobar) => can't convert Symbol into Integer (TypeError)
– GutenYe
Dec 25 '11 at 9:10
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How to create a private class method?
...thermore, the method is operating
# solely upon 'reference' and 'under_test' and will be flagged as having
# low cohesion by quality metrics unless made a class method.
def self.compare(reference, under_test)
# special floating point comparison
(reference - under_test).ab...
Handling Dialogs in WPF with MVVM
...It is OK for a ViewModel to call a dialog directly. However, when you are testing a ViewModel , that means that the dialog will either pop up during your test, or fail all together (never really tried this).
So, what needs to happen is while testing is to use a "test" version of your dialog. Th...
Getting a list of all subdirectories in the current directory
...differences between os.walk and os.listdir+os.path.isdir solutions: I just tested on a directory with 10,000 subdirectories (with millions of files in the hierarchy below) and the performance differences are negligible. os.walk: "10 loops, best of 3: 44.6 msec per loop" and os.listdir+os.path.isdir:...
Local Storage vs Cookies
...astructure. Modern web apps include 3rd party JavaScript libraries for A/B testing, funnel/market analysis, and ads. We use package managers like Bower to import other peoples’ code into our apps.
What if only one of the scripts you use is compromised? Malicious
JavaScript can be embedded o...
How to use regex in String.contains() method in Java
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public static void main(String[] args) {
String test = "something hear - to - find some to or tows";
System.out.println("1.result: " + contains("- to -( \\w+) som", test, null));
System.out.println("2.result: " + contains("- to -( \\w+) som", test, 5));
}
static bo...
How to check if a symlink exists
...
Yes, -L and -h are the same. man test also confirms this.
– Sparhawk
Feb 9 '15 at 1:20
...