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How can I rename a database column in a Ruby on Rails migration?
...cord::Migration
def up
add_column :table, :correct_name_column_one, :string
add_column :table, :correct_name_column_two, :string
puts 'Updating correctly named columns'
execute "UPDATE table_name SET correct_name_column_one = old_name_column_one, correct_name_column_two = old_name...
jQuery vs document.querySelectorAll
... of ID
if ( elem.id === match[3] ) {
return makeArray( [ elem ], extra );
}
} else {
return makeArray( [], extra );
}
And if all else fails it will return the result of oldSizzle(query, context, extra, seed).
...
Storing Python dictionaries
..., the foundational unit in json is the "Object", which is defined as { <string> : <value>}. Look familiar? The json module in the standard library supports every Python native type and can easily be extended with a minimal knowledge of json to support user-defined classes. The JSON homep...
AsyncTask threads never die
...t will have from 5 to 128 threads. If there are more than 5 threads, those extra threads will stick around for at most 10 seconds before being removed. (note: these figures are for the presently-visible open source code and vary by Android release).
Leave the AsyncTask threads alone, please.
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How to best display in Terminal a MySQL SELECT returning too many fields?
...above comment, when you type SELECT * FROM sometable\G you are sending the string to the mysql command line client, not Windows, which is why the G is case sensitive
– Hurricane Hamilton
Mar 24 '14 at 15:31
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How to adjust layout when soft keyboard appears
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+1 That simple? Any extra conditions? What was the image you posted about?
– Roy Lee
May 7 '13 at 4:17
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What are the basic rules and idioms for operator overloading?
...oo {
public:
// Overloaded call operator
int operator()(const std::string& y) {
// ...
}
};
Usage:
foo f;
int a = f("hello");
Throughout the C++ standard library, function objects are always copied. Your own function objects should therefore be cheap to copy. If a functi...
Creating a new user and password with Ansible
...th pip install passlib. Then to be able to use an inline vault encrypted string i had to reformat with the following addition: password: {{ upassword | string | password_hash('sha512') }}. This avoids the error message secret must be unicode or bytes, not ansible.parsing.yaml.objects.AnsibleVaultE...
How to prevent line break at hyphens on all browsers
...ng but letters and digits. The reason is that some browsers may even break strings like “2/3” or “f(0)” (see my page on oddities of line breaking in browsers).
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Convert LocalDate to LocalDateTime or java.sql.Timestamp
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got compile error on argument as valueOf() accepts a string.
– Patriotic
Jul 3 at 17:32
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