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Ruby on Rails form_for select field with class
...or html options. So all you need is to give default empty options as first param after list of items and then add your class to html_options.
http://api.rubyonrails.org/classes/ActionView/Helpers/FormOptionsHelper.html#method-i-select
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git command to show all (lightweight) tags creation dates
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@revelt git >= 2.0 provides a sort param. Put a minus in to reverse the order. git tag -l --sort=-creatordate --format='%(creatordate:short)|%(refname:short)'
– con--
Apr 4 '19 at 13:24
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What are the most common naming conventions in C?
...me, method name, typedef
this_is_my_convention global and local variables,
parameters, struct and union elements
thisismyconvention [optional] very local and temporary variables (such like a for() loop index)
And that's it.
It gives
class MyClass {
enum TheEnumeration {
FIRST_ELEMEN...
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]
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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!
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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?
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As suggested here you can also inject the HttpServletRequest as a method param, e.g.:
public MyResponseObject myApiMethod(HttpServletRequest request, ...) {
...
}
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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...
“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');
}
);
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form_for but to post to a different action
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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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