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ActiveRecord: size vs count
... don't know what you are doing, use size...
count
Resolves to sending a Select count(*)... query to the DB. The way to go if you don't need the data, but just the count.
Example: count of new messages, total elements when only a page is going to be displayed, etc.
length
Loads the required dat...
How to use querySelectorAll only for elements that have a specific attribute set?
I'm trying to use document.querySelectorAll for all checkboxes that have the value attribute set.
3 Answers
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Is there a link to the “latest” jQuery library on Google APIs? [duplicate]
...cache life, (wiping out the benefits of using a CDN) so you'd be better of selecting a version of jQuery instead.
More details on the jQuery blog:
http://blog.jquery.com/2014/07/03/dont-use-jquery-latest-js/
share
...
VB.NET equivalent to C# var keyword [duplicate]
...hen just use the Dim keyword, thus:
Dim query = From x In y Where x.z = w Select x
Contrary to some of the other answers, you do not need Option Strict On.
If you're using the VS IDE you can just hover over the variable names, but to get the compile-time types of variables (GetType(variableName)...
How can I use a DLL file from Python?
...
Next;
Application type -> DLL;
Additional options -> Empty project (select);
Additional options -> Precompiled header (unselect);
Project -> Properties -> Configuration Manager -> Active solution platform: x64;
Project -> Properties -> Configuration Manager -> Active solu...
How to use Google App Engine with my own naked domain (not subdomain)?
...es offer naked domain redirection.
Login to your google apps account and select "manage this domain"
Navigate to Domain settings
Within Domain Setings, navigate to Domain names
There's a link that says "change the A record". Clicking that will give you the destination IPs for the A records you nee...
Nested attributes unpermitted parameters
...4, I was able to get it working by structuring my fields_for as:
<%= f.select :tag_ids, Tag.all.collect {|t| [t.name, t.id]}, {}, :multiple => true %>
Then in my controller I have my strong params as:
private
def post_params
params.require(:post).permit(:id, :title, :content, :publi...
How does the Google “Did you mean?” Algorithm work?
...ults than using n-gram indexing, as described above.
In each case you must select the best correction from a list. This may be a distance metric such as levenshtein, the keyboard metric, etc.
For a multi-word phrase, only one word may be misspelled, in which case you can use the remaining words as c...
PostgreSQL - Rename database
...res
-- force disconnect all other clients from the database to be renamed
SELECT pg_terminate_backend( pid )
FROM pg_stat_activity
WHERE pid <> pg_backend_pid( )
AND datname = 'name of database';
-- rename the database (it should now have zero clients)
ALTER DATABASE "name of database" R...
How can I keep my fork in sync without adding a separate remote?
... upstream repository.
Visit the URL, click the green "Install" button and select the repositories where you want to enable automatic synchronization.
The branch is updated once per hour directly on GitHub, on your local machine you need to pull the master branch to ensure that your local copy is i...