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How does one use rescue in Ruby without the begin and end block
...n a lot with ActiveRecord validations:
def create
@person = Person.new(params[:person])
@person.save!
redirect_to @person
rescue ActiveRecord::RecordInvalid
render :action => :new
end
I think this is very lean code!
...
Getting the name of a variable as a string
...ets the name of var. Does it from the out most frame inner-wards.
:param var: variable to get name from.
:return: string
"""
for fi in reversed(inspect.stack()):
names = [var_name for var_name, var_val in fi.frame.f_locals.items() if var_val is var]
...
How to close tag properly?
... <col> <area> <base>
<meta> <embed> <param>
<track> <wbr> <keygen> (HTML 5.2 Draft removed)
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Spring: how do I inject an HttpServletRequest into a request-scoped bean?
...
As suggested here you can also inject the HttpServletRequest as a method param, e.g.:
public MyResponseObject myApiMethod(HttpServletRequest request, ...) {
...
}
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“sending 'const NSString *' to parameter of type 'NSString *' discards qualifiers” warning
...a%2f%2fstackoverflow.com%2fquestions%2f6828831%2fsending-const-nsstring-to-parameter-of-type-nsstring-discards-qualifier%23new-answer', 'question_page');
}
);
Post as a guest
...
How to write to a file, using the logging Python module?
...ables holding the
respective info. of course, the values for the function params are up
to you.
the first time i was using the logging module i made the mistake of writing the following, which generates an OS file lock error (the
above is the solution to that):
import logging
from logging.handle...
form_for but to post to a different action
...
I have done it like that
<%= form_for :user, url: {action: "update", params: {id: @user.id}} do |f| %>
Note the optional parameter id set to user instance id attribute.
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When to use lambda, when to use Proc.new?
...le differences. However, I can point out that Ruby 1.9 now allows optional parameters for lambdas and blocks.
Here's the new syntax for the stabby lambdas under 1.9:
stabby = ->(msg='inside the stabby lambda') { puts msg }
Ruby 1.8 didn't have that syntax. Neither did the conventional way of ...
Python: Ignore 'Incorrect padding' error when base64 decoding
...data, altchars=b'+/'):
"""Decode base64, padding being optional.
:param data: Base64 data as an ASCII byte string
:returns: The decoded byte string.
"""
data = re.sub(rb'[^a-zA-Z0-9%s]+' % altchars, b'', data) # normalize
missing_padding = len(data) % 4
if missing_padd...
Using PowerShell credentials without being prompted for a password
...efault `
-Credential $cred
<any other parameters relevant to you>
You may need a different -Authentication switch value because I don't know your environment.
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