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In C#, how do I calculate someone's age based on a DateTime type birthday?
...ob = int.Parse(dateOfBirth.ToString("yyyyMMdd"));
int age = (now - dob) / 10000;
Or alternatively without all the type conversion in the form of an extension method. Error checking omitted:
public static Int32 GetAge(this DateTime dateOfBirth)
{
var today = DateTime.Today;
var a = (today...
How to concatenate two MP4 files using FFmpeg?
...source files. Are they using different sample rates (e.g. 44,100 Hz and 48,000 Hz)? Or are they using different bit rates (e.g. 128 kbps and 64 kbps)? In either such case, I don't quite understand how the command -c copy (a stream-copy instruction) would modify the source files to make them compatib...
Get last n lines of a file, similar to tail
... timeit it seems pretty fast. Tailing 100 lines of a log file that has 100,000 lines:
>>> timeit.timeit('tail.tail(f, 100, 4098)', 'import tail; f = open("log.txt", "r");', number=10)
0.0014600753784179688
>>> timeit.timeit('tail.tail(f, 100, 4098)', 'import tail; f = open("log.tx...
GetHashCode Guidelines in C#
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Eric Lippert
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answered Jan 20 '09 at 18:36
Jeff YatesJeff Yates
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Generic Repository With EF 4.1 what is the point
...entations using EF with the ISeries. The only one available was to pay $12,000 to IBM for their DB2Connect)
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MySQL JOIN the most recent row only?
...ow it makes my queries virtually instantaneous (WorkBench literally says 0.000 seconds, even with sql_no_cache set), whereas doing the search in the join took multiple seconds to complete. Still baffled, but I mean you can't argue with results like that.
– Brian Leishman
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Colors in JavaScript console
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To use HTML span elements to style different portions of a console.log message, check out this code: jsfiddle.net/yg6hk/5
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Is either GET or POST more secure than the other?
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answered Oct 13 '08 at 18:11
stephenbayerstephenbayer
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Storing time-series data, relational or non?
...y fast, and the query does not depend on the size of the table (grabbing 1,000 rows from a 16 billion row table is instantaneous).
Your table has one serious impediment. Given your description, the actual PK is (Device, Metric, DateTime). (Please don't call it TimeStamp, that means something else,...
What is a “surrogate pair” in Java?
...F, some additional complexity is used to store values above this range (0x10000 to 0x10FFFF). This is done using pairs of code units known as surrogates.
The surrogate code units are in two ranges known as "high surrogates" and "low surrogates", depending on whether they are allowed at the start or...