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Calculate age given the birth date in the format YYYYMMDD
...- birthday.getTime();
var ageDate = new Date(ageDifMs); // miliseconds from epoch
return Math.abs(ageDate.getUTCFullYear() - 1970);
}
Disclaimer: This also has precision issues, so this cannot be completely trusted either. It can be off by a few hours, on some years, or during daylight sav...
Relative paths based on file location instead of current working directory [duplicate]
...
This will make your shell script work independent of where you invoke it from. Each time you run it, it will be as if you were running ./cat.sh inside dir.
Note that this script only works if you're invoking the script directly (i.e. not via a symlink), otherwise the finding the current location ...
Representing graphs (data structure) in Python
How can one neatly represent a graph in Python ? (Starting from scratch i.e. no libraries!) What data structure (e.g. dicts/tuples/dict(tuples)) will be fast but also memory efficient? One must be able to do various graph operations on it.
As pointed out, the various graph representations...
Best way to determine user's locale within browser
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From MDN developer.mozilla.org/en-US/docs/Web/API/NavigatorLanguage/… "The Accept-Language HTTP header in every HTTP request from the user's browser uses the same value for the navigator.languages property except for the ex...
Why does changing 0.1f to 0 slow down performance by 10x?
...amplitude (not audible) DC or or square wave signal to jitter numbers away from denormality.
– Russell Borogove
Feb 17 '12 at 0:12
16
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Catching error codes in a shell pipe
...way).
In the original pipeline, it is feasible for 'c' to be reading data from 'b' before 'a' has finished - this is usually desirable (it gives multiple cores work to do, for example). If 'b' is a 'sort' phase, then this won't apply - 'b' has to see all its input before it can generate any of its...
Side-by-side plots with ggplot2
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You can use the following multiplot function from Winston Chang's R cookbook
multiplot(plot1, plot2, cols=2)
multiplot <- function(..., plotlist=NULL, cols) {
require(grid)
# Make a list from the ... arguments and plotlist
plots <- c(list(...), ...
Convert one date format into another in PHP
...n't recognize the y-m-d-h-i-s format.
PHP 5.3 and up
Use DateTime::createFromFormat. It allows you to specify an exact mask - using the date() syntax - to parse incoming string dates with.
PHP 5.2 and lower
You will have to parse the elements (year, month, day, hour, minute, second) manually usi...
Unit testing of private methods [duplicate]
...de (and just the test code) access to the privates, whilst protecting them from everything else.
However, it is preferable to test through the public interface. If your class X has a lot of code in the private member functions then it might be worth extracting a new class Y which is used by the imp...
What is a higher kinded type in Scala?
...a that supports anonymous type functions, you could shorten that last line from the examples to:
types (informally) String [x] => x [F[x]] => F[String]) // I repeat, this is not valid Scala, and might never be
(On a personal note, I regret ever having talked about "higher-kind...