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`levels
...;-`(factor(x), y))
It's kind of beautiful that this pure-functional transformation (up until the very end, where the assignment happens) is equivalent to what an assignment would be in an imperative language. If I remember correctly this construct in functional languages is called a lens.
But the...
Running a cron every 30 seconds
... ; /path/to/executable param1 param2 )
You'll see I've added comments and formatted to ensure it's easy to keep them synchronised.
Both cron jobs actually run every minute but the latter one will wait half a minute before executing the "meat" of the job, /path/to/executable.
For other (non-cron-bas...
API Keys vs HTTP Authentication vs OAuth in a RESTful API
...how to go about securing the API, I found a few different opinions on what form to use. I've seen some resources say HTTP-Auth is the way to go, while others prefer API keys, and even others (including the questions I found here on SO) swear by OAuth.
...
Should MySQL have its timezone set to UTC?
... DST.
Here are some notes I collected of how to work with timezones as a form of cheatsheet for myself and others which might influence what timezone the person will choose for his/her server and how he/she will store date and time.
MySQL Timezone Cheatsheet
Notes:
Changing the timezone will...
What does principal end of an association means in 1:1 relationship in Entity framework
...xchange.using('gps', function() { StackExchange.gps.track('embedded_signup_form.view', { location: 'question_page' }); });
$window.unbind('scroll', onScroll);
}
};
...
Detecting that the browser has no mouse and is touch-only
...ght after he's made the effort to pinpoint your now crowded UI?
In bullet form, quoting stucox at https://github.com/Modernizr/Modernizr/issues/869#issuecomment-15264101
We want to detect the presence of a mouse
Ae probably can't detect before an event is fired
As such, what we're detect...
Which, if any, C++ compilers do tail-recursion optimization?
...
All current mainstream compilers perform tail call optimisation fairly well (and have done for more than a decade), even for mutually recursive calls such as:
int bar(int, int);
int foo(int n, int acc) {
return (n == 0) ? acc : bar(n - 1, acc + 2);
}
int...
Why use Abstract Base Classes in Python?
...lve all the problems. ABCs offer an intermediate solution between the free-form of Python and the bondage-and-discipline of a staticly-typed language.
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Synchronise ScrollView scroll positions - android
...xchange.using('gps', function() { StackExchange.gps.track('embedded_signup_form.view', { location: 'question_page' }); });
$window.unbind('scroll', onScroll);
}
};
...
Simple logical operators in Bash
...executed in a separate subprocess, so any redirection, assignment, etc. performed inside the parentheses has no effect outside the parentheses.
With a leading dollar sign, $(…) is a command substitution: there is a command inside the parentheses, and the output from the command is used as part o...