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Nested attributes unpermitted parameters
...ection and now you must whitelist params in the controller (instead of attr_accessible in the model) because the former optional gem strong_parameters became part of the Rails Core.
This should look something like this:
class PeopleController < ActionController::Base
def create
Person.cre...
json_encode is returning NULL?
...
I bet you are retrieving data in non-utf8 encoding: try to put mysql_query('SET CHARACTER SET utf8') before your SELECT query.
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How can I merge two hashes without overwritten duplicate keys in Ruby?
...lts.merge(options)
Or, if you're using Rails you can do:
options.reverse_merge!(defaults)
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Use StringFormat to add a string to a WPF XAML binding
... number and units isn't fixed. <Run Text="{x:Static s:UIStrings.General_FahrenheitAbbreviation}" />
– Matt Becker
Nov 10 '15 at 15:19
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What is the correct way of using C++11's range-based for?
...t class, with custom copy semantics.
class X
{
public:
X()
: m_data(0)
{}
X(int data)
: m_data(data)
{}
~X()
{}
X(const X& other)
: m_data(other.m_data)
{ cout << "X copy ctor.\n"; }
X& operator=(const X& other)
...
Execute a terminal command from a Cocoa app
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I want to run this command "system_profiler SPApplicationsDataType -xml" but i am getting this error "launch path not accessible"
– Vikas Bansal
Jul 29 '15 at 12:20
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Initializing a struct to 0
...denia. I disagree. I already know what foo = {0} means. If I saw foo = ZERO_FULL, I'd have to grep for the definition of ZERO_FULL.
– Andrew Bainbridge
Jul 24 '18 at 14:51
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file_put_contents - failed to open stream: Permission denied
... the folder
sudo chown -R www-data:www-data /var/www
that should make file_put_contents work now. But for more security you better also set the permissions like below
find /var/www -type d -print0 | xargs -0 chmod 0755 # folder
find /var/www -type f -print0 | xargs -0 chmod 0644 # files
change /v...
In android studio,cannot load 2 facets-unknown facet type:android and android-gradle
...ver did it and suddenly I got those same errors.
– CJ_COIMBRA
Nov 11 '15 at 1:03
6
Unable to appl...
Computed / calculated / virtual / derived columns in PostgreSQL
...al, but makes makes life a bit easier).
Suppose my computation is md5(some_string_field), then I create the index as:
CREATE INDEX some_string_field_md5_index ON some_table(MD5(some_string_field));
Now, any queries that act on MD5(some_string_field) will use the index rather than computing it f...