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Find rows with multiple duplicate fields with Active Record, Rails & Postgres
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I'm trying the same method but trying to get the User.id as well, adding it to the select and group returns an empty array. How can I return the whole User model, or at least include the :id?
– Ashbury
Oct 27 '15 at 8:37
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How to change color of Android ListView separator line?
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You can set this value in a layout xml file using android:divider="#FF0000". If you are changing the colour/drawable, you have to set/reset the height of the divider too.
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_c...
How do I sort an NSMutableArray with custom objects in it?
...sortedArray = [drinkDetails sortedArrayUsingComparator:^NSComparisonResult(id a, id b) {
NSDate *first = [(Person*)a birthDate];
NSDate *second = [(Person*)b birthDate];
return [first compare:second];
}];
Performance
The -compare: and block-based methods will be quite a bit faster, in...
What is SQL injection? [duplicate]
...uery string, and the result modifies the syntax of your query in ways you didn't intend.
It doesn't have to be malicious, it can be an accident. But accidental SQL injection is more likely to result in an error than in a vulnerability.
The harmful content doesn't have to come from a user, it coul...
How can a Java program get its own process ID?
How do I get the id of my Java process?
22 Answers
22
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Multiple github accounts on the same computer?
...epositories using different personas, you need to make sure that your individual repositories have the user settings overridden accordingly:
Setting user name, email and GitHub token – Overriding settings for individual repos
https://help.github.com/articles/setting-your-commit-email-address-in-g...
Handling optional parameters in javascript
...can check if your second argument is a function or not:
function getData (id, parameters, callback) {
if (arguments.length == 2) { // if only two arguments were supplied
if (Object.prototype.toString.call(parameters) == "[object Function]") {
callback = parameters;
}
}
//...
}
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Proper Repository Pattern Design in PHP?
...ll code must be fully testable and mockable.
The controller should have no idea where the data is stored (meaning it can be changed).
Example to show a SQL implementation (most common).
For maximum performance, controllers should only receive the data they need—no extra fields.
Implementation shou...
How do I add indices to MySQL tables?
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ALTER TABLE `table` ADD INDEX `product_id_index` (`product_id`)
Never compare integer to strings in MySQL. If id is int, remove the quotes.
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How do I update/upsert a document in Mongoose?
...goose does not support these hooks with this method:
defaults
setters
validators
middleware
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