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Where can I set environment variables that crontab will use?
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Have 'cron' run a shell script that sets the environment before running the command.
Always.
# @(#)$Id: crontab,v 4.2 2007/09/17 02:41:00 jleffler Exp $
# Crontab file for Home Directory for Jonathan Leffler (JL)
#----------------------------------------------------------------...
Toggle button using two image on different state
... android:textOn="" android:textOff="" was what i was looking for
– png
Oct 29 '13 at 13:01
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What's an elegant way to conditionally add a class to an HTML element in a view?
...ur variable:
<div class="<%= 'ok' if @success %>">
A second form using the ternary ?: operator is useful if you want to choose between two classes:
<div class="<%= @success ? 'good' : 'bad' %>">
Finally, you can use Rail's record tag helpers such as div_for, which will ...
Maven: How to include jars, which are not available in reps into a J2EE project?
...le to the local repository. If you create a script with a Maven invocation for each file and keep it alongside the jars, you (and anyone else with access) can easily install the jars (and associated pom files) to their local repository.
For example:
mvn install:install-file -Dfile=/usr/jars/foo.ja...
Setting href attribute at runtime
...both cases, please use the appropriate selector. If you have set the class for the anchor element, use '.class-name' and if you have set the id for the anchor element, use '#element-id'.
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What do the plus and minus signs mean in Objective-C next to a method?
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+ is for a class method and - is for an instance method.
E.g.
// Not actually Apple's code.
@interface NSArray : NSObject {
}
+ (NSArray *)array;
- (id)objectAtIndex:(NSUInteger)index;
@end
// somewhere else:
id myArray = [NSA...
jQuery checkbox checked state changed event
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Actually I've got it looking for the checkbox by the class. Is there a better way to just get all checkboxes regardless of class?
– AnonyMouse
Dec 7 '11 at 22:07
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Django Forms: if not valid, show form with error message
I Django forms, it can check whether the form is valid:
7 Answers
7
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How to scroll HTML page to given anchor?
... tried this and it worked. Beyond me how I never came across this method before. Mozilla Docs for this method. Also, it appears that this will be very well supported in browsers.
– Jonathan Dumaine
Apr 11 '13 at 5:19
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Drawing an image from a data URL to a canvas
...he page or purely in JS) by setting the src of the image to your data URL. For example:
var img = new Image;
img.src = strDataURI;
The drawImage() method of HTML5 Canvas Context lets you copy all or a portion of an image (or canvas, or video) onto a canvas.
You might use it like so:
var myCanva...