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In C#, how do I calculate someone's age based on a DateTime type birthday?
...
Here is a test snippet:
DateTime bDay = new DateTime(2000, 2, 29);
DateTime now = new DateTime(2009, 2, 28);
MessageBox.Show(string.Format("Test {0} {1} {2}",
CalculateAgeWrong1(bDay, now), // outputs 9
...
Further understanding setRetainInstance(true)
...on (if (...findFragmentByTag() == null) { ...).
Finally, I created my own test activity to see exactly what functions are called. It outputs this, when you start in portrait and rotate to landscape. The code is below.
(This is edited a bit to make it easier to read.)
TestActivity@415a4a30: this()...
File path to resource in our war/WEB-INF folder?
...xt context = getContext();
String fullPath = context.getRealPath("/WEB-INF/test/foo.txt");
http://tomcat.apache.org/tomcat-5.5-doc/servletapi/javax/servlet/ServletContext.html#getRealPath(java.lang.String)
That will get you the full system path to the resource you are looking for. However, that ...
Fastest way to duplicate an array in JavaScript - slice vs. 'for' loop
...ays to clone an array:
loop
slice
Array.from()
concat
spread operator (FASTEST)
map A.map(function(e){return e;});
There has been a huuuge BENCHMARKS thread, providing following information:
for blink browsers slice() is the fastest method, concat() is a bit slower, and while loop is 2.4x slower....
Identify if a string is a number
...
You can also use:
stringTest.All(char.IsDigit);
It will return true for all Numeric Digits (not float) and false if input string is any sort of alphanumeric.
Please note: stringTest should not be an empty string as this would pass the test of bei...
What is “:-!!” in C code?
...answer here has a good response:
These macros implement a compile-time test, while assert() is a run-time test.
Exactly right. You don't want to detect problems in your kernel at runtime that could have been caught earlier! It's a critical piece of the operating system. To whatever extent prob...
Determine project root from a running node.js application
... That means that you can determine whether a file has been run directly by testing require.main === module
Because module provides a filename property (normally equivalent to __filename), the entry point of the current application can be obtained by checking require.main.filename.
So if you w...
What is the most efficient way to create HTML elements using jQuery?
...cument.createElement('div')); Benchmarking shows this technique is the fastest. I speculate this is because jQuery doesn't have to identify it as an element and create the element itself.
You should really run benchmarks with different Javascript engines and weigh your audience with the results. ...
How to get primary key column in Oracle?
...ere I created a table for get primary key column in oracle which is called test and then query
create table test
(
id int,
name varchar2(20),
city varchar2(20),
phone int,
constraint pk_id_name_city primary key (id,name,city)
);
SELECT cols.table_name, cols.column_name, cols.position, cons.status,...
How to detect page zoom level in all modern browsers?
... and blog posts I could find, here's a summary. I also set up this page to test all these methods of measuring the zoom level.
Edit (2011-12-12): I've added a project that can be cloned: https://github.com/tombigel/detect-zoom
IE8: screen.deviceXDPI / screen.logicalXDPI (or, for the zoom level re...