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Types in MySQL: BigInt(20) vs Int(20)
...E TABLE foo ( bar INT(20) ZEROFILL );
INSERT INTO foo (bar) VALUES (1234);
SELECT bar from foo;
+----------------------+
| bar |
+----------------------+
| 00000000000000001234 |
+----------------------+
It's a common source of confusion for MySQL users to see INT(20) and assume ...
How can I prevent SQL injection in PHP?
...
Using PDO (for any supported database driver):
$stmt = $pdo->prepare('SELECT * FROM employees WHERE name = :name');
$stmt->execute([ 'name' => $name ]);
foreach ($stmt as $row) {
// Do something with $row
}
Using MySQLi (for MySQL):
$stmt = $dbConnection->prepare('SELECT * FROM...
How to select the row with the maximum value in each group
In a dataset with multiple observations for each subject I want to take a subset with only the maximum data value for each record. For example, with a following dataset:
...
Find the min/max element of an Array in JavaScript
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jsperf.com/array-min-max-random/1 starting from 60 elements Math methods are breaking equal with while cycles, if array size is greater than 60, than Math methods wins. Larger the array - greater the Math methods overtake. ( for 100 elems Math.min/max is 10% faster, f...
How do I perform the SQL Join equivalent in MongoDB?
...background as well, I would appreciate MongoDB taking a 'result set' (with selected returned fields) as input for a new query in one go, much like nested queries in SQL
– Stijn Sanders
Nov 26 '10 at 23:17
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Is it possible to update a localized storyboard's strings?
...r Cocoa Touch Storyboard] file type or a [Localizable Strings] file type.
Select your base storyboard file from the Project Navigator
Find the Localization section in the File Inspector
If your file is currently a [Localizable Strings], change it to [Interface Builder Cocoa Touch Storyboard] or vic...
belongs_to through associations
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I'd like to know myself. Everything I tried fired 3 selects. You can specify a "-> { joins :something }" lambda on an association. The join is fired but subsequently another select anyway. I wasn't able to tune this up.
– Renra
Oct 21 ...
Ruby: How to post a file via HTTP as multipart/form-data?
I want to do an HTTP POST that looks like an HMTL form posted from a browser. Specifically, post some text fields and a file field.
...
Becoming better at Vim [closed]
... a long time, but I'm at a level where I use insert mode most of the time, and I still use the arrow keys to move around(!).
...
Using Emacs to recursively find and replace in text files not already open
...files, type D to close them all.
Step-by-Step Guide for Emacs Beginners
Select Target Files
Start emacs by typing “emacs” in the command line interface prompt. (Or, double click the Emacs icon if you are in a Graphics User Interface environment)
Selecting Files in a Directory
First you nee...