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Does R have an assert statement as in python?
a statement that checks if something is true and if not prints a given error message and exits
3 Answers
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How to model type-safe enum types?
...y, Long] and add a value say Mon to it the compiler throws an invalid type error. Expected Weekday.Weekday found Value? Why does this happen?
– Sohaib
Jun 14 '15 at 18:30
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What's the simplest way to subtract a month from a date in Python?
...16:12:27.870000
2010-03-06 16:12:27.886000
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2011-01-06 16:...
Converting string from snake_case to CamelCase in Ruby
...ant in context (and does need camelize). 'active_record'.constantize gives error, 'active_record'.camelize.constantize returns the constant ActiveRecord, 'active_record'.classify returns the string 'ActiveRecord'. And if you did 'no_class'.camelize.constantize you'd get error (no such constant NoCla...
Unique BooleanField value in Django?
...he pre_save method on django.db.models.BooleanField. Instead of raising an error if another field was True, I made all other fields False if it was True. Also instead of raising an error if the field was False and no other field was True, I saved it the field as True
fields.py
from django.db.mode...
HTML anchor link - href and onclick both?
...se purposes.
– Amber
May 6 '15 at 1:05
1
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Why does Javascript's regex.exec() not always return the same value? [duplicate]
...feature.
– Tomalak
Jul 13 '12 at 20:05
3
@Esailija @squint that's not entirely true. If you use t...
“Diff” an image using ImageMagick
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– Brecht Machiels
Mar 16 '16 at 13:05
Here's a script to visually diff two PDFs page-by-page using this method: gist....
converting a base 64 string to an image and saving it
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}
return image;
}
It is possible to get an exception A generic error occurred in GDI+. when the bytes represent a bitmap. If this is happening save the image before disposing the memory stream (while still inside the using statement).
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Best way to allow plugins for a PHP application
...();
$args = func_get_args();
if($num_args < 2)
trigger_error("Insufficient arguments", E_USER_ERROR);
// Hook name should always be first argument
$hook_name = array_shift($args);
if(!isset($listeners[$hook_name]))
return; // No plugins have registered this ...