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Why is 1/1/1970 the “epoch time”?
... Does 1/60 have anything to do with the frequency of the American power net?
– xtofl
Jul 7 '09 at 9:23
55
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Is there a better way to dynamically build an SQL WHERE clause than by using 1=1 at its beginning?
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Good solution, but the ToArray() isn't necessary with .NET 4 as there is an overload which accepts any IEnumerable<string>.
– fero
Jun 26 '13 at 13:27
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Finding what methods a Python object has
...allable(getattr(object, method_name))]
I discovered it at diveintopython.net (Now archived). Hopefully, that should provide some further detail!
If you get an AttributeError, you can use this instead:
getattr( is intolerant of pandas style python3.6 abstract virtual sub-classes. This code does ...
WPF - How to force a Command to re-evaluate 'CanExecute' via its CommandBindings
...t.CommandWpf since GalaSoft.MvvmLight.Command will cause trouble mvvmlight.net/installing/changes#v5_0_2
– fuchs777
Jan 29 '16 at 12:49
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Best practice for embedding arbitrary JSON in the DOM?
...t tag and allow direct injection into the dom. See here:
http://jsfiddle.net/YmhZv/1/
Here is the injection
<script type="application/json" id="stuff">
{
"unicorns": "awesome",
"abc": [1, 2, 3],
"badentry": "blah </script><div id='baddiv'>I should not exist.</div...
Why does !{}[true] evaluate to true in JavaScript?
...true, but undefined, and undefined is evaluated as false:
http://jsfiddle.net/67GEu/
'use strict';
var b = {}[true];
alert(b); // undefined
b = !{}[true];
alert(b); // true
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Bad value X-UA-Compatible for attribute http-equiv on element meta
... support as Chrome Frame ignores IE conditional comments, see jeffreybarke.net/2010/08/…
– Jasper Moelker
Jun 17 '13 at 11:34
5
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How to force a web browser NOT to cache images
...close();
// no-cache headers - complete set
// these copied from [php.net/header][1], tested myself - works
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Some time in the past
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache,...
Only read selected columns
...wnload and save the the CSV JDBC driver from this link: http://sourceforge.net/projects/csvjdbc/files/latest/download
> library(RJDBC)
> path.to.jdbc.driver <- "jdbc//csvjdbc-1.0-18.jar"
> drv <- JDBC("org.relique.jdbc.csv.CsvDriver", path.to.jdbc.driver)
> conn <- dbConnect(d...
Easiest way to toggle 2 classes in jQuery
...gleClass('B', state);">Click Me</span>
Try it: https://jsfiddle.net/v15q6b5y/
Just the JS à la jQuery:
$('.selector').toggleClass('A', !state).toggleClass('B', state);
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