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How to create a cron job using Bash automatically without the interactive editor?
...ontab
crontab -l > mycron
#echo new cron into cron file
echo "00 09 * * 1-5 echo hello" >> mycron
#install new cron file
crontab mycron
rm mycron
Cron line explaination
* * * * * "command to be executed"
- - - - -
| | | | |
| | | | ----- Day of week (0 - 7) (Sunday=0 or 7)
| | | ------...
Using 'return' in a Ruby block
I'm trying to use Ruby 1.9.1 for an embedded scripting language, so that "end-user" code gets written in a Ruby block. One issue with this is that I'd like the users to be able to use the 'return' keyword in the blocks, so they don't need to worry about implicit return values. With this in mind, t...
How do you test to see if a double is equal to NaN?
... static Double.isNaN(double) method, or your Double's .isNaN() method.
// 1. static method
if (Double.isNaN(doubleValue)) {
...
}
// 2. object's method
if (doubleObject.isNaN()) {
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}
Simply doing:
if (var == Double.NaN) {
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}
is not sufficient due to how the IEEE standard for ...
Difference between len() and .__len__()?
Is there any difference between calling len([1,2,3]) or [1,2,3].__len__() ?
4 Answers
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Regular expression to match URLs in Java
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106
Try the following regex string instead. Your test was probably done in a case-sensitive manner...
How to get a random value from dictionary in python
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14 Answers
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Redirect to named url pattern directly from urls.py in django?
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198
If you are on Django 1.4 or 1.5, you can do this:
from django.core.urlresolvers import revers...
How do I get the current absolute URL in Ruby on Rails?
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Java Replacing multiple different substring in a string at once (or in the most efficient way)
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11 Answers
11
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EF Code First: How do I see 'EntityValidationErrors' property from the nuget package console?
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217
I got annoyed by this recently too. I fixed it by putting a wrapper function in the Configurat...