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Where to define custom error types in Ruby and/or Rails?
...w to handle this with ActiveRecord models.
Creating Custom Error
class MyClass
# create a custome error
class MissingRequirement < StandardError; end
def my_instance_method
raise MyClass::MissingRequirement, "My error msg" unless true
end
end
Testing (minitest)
test "should...
See what process is using a file in Mac OS X
...
lsof | grep myfilename worked for me. I've got a PDF file in my Trash that the system claims is in use. Weirdly lsof claims it's in use by Preview but Preview doesn't seem to be running (eg when I command-tab through the running apps) b...
How to hide first section header in UITableView (grouped style)
...
I have a workaround that seems reasonably clean to me. So I'm answering my own question.
Since 0 as the first section header's height doesn't work, I return 1. Then I use the contentInset to hide that height underneath the navigation bar.
Objective-C:
- (CGFloat) tableView:(UITableView *)table...
How to un-escape a backslash-escaped string?
...istopheD's answer covers python 2.
# create a `bytes` object from a `str`
my_str = "Hello,\\nworld"
# (pick an encoding suitable for your str, e.g. 'latin1')
my_bytes = my_str.encode("utf-8")
# or directly
my_bytes = b"Hello,\\nworld"
print(my_bytes.decode("unicode_escape"))
# "Hello,
# world"
...
Where in memory are my variables stored in C?
By considering that the memory is divided into four segments: data, heap, stack, and code, where do global variables, static variables, constant data types, local variables (defined and declared in functions), variables (in main function), pointers, and dynamically allocated space (using malloc and ...
Adding custom radio buttons in android
...ng the functionality intact .... All i am trying to achieve as i showed in my question ... Any further directions ! [Note:: please look at the updated question]
– Devrath
Oct 3 '13 at 16:41
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Get model's fields in Django
...s: get_fields() and get_field()
Usage:
fields = model._meta.get_fields()
my_field = model._meta.get_field('my_field')
https://docs.djangoproject.com/en/1.8/ref/models/meta/
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Failed loading english.pickle with nltk.data.load
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it installs into my home folder in a directory nltk_data. Should I copy this directory of punkt into any nltk library folder. pls help
– sumanth232
Apr 14 '15 at 11:31
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How can I change the version of npm using nvm?
I've been using NVM to install the latest versions of nodeJS for my node work. It works totally fine for installing separate versions and switching between them. It also installs the latest version of NPM within each local .../bin folder along with the node binary. However, there doesn't seem to be ...
How to detect if a script is being sourced
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Unfortunely, that's wrong! see my answer
– F. Hauri
Apr 11 '14 at 11:33
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