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Rails Model find where not equal
...User.where.not(user_id: me)
In Rails 3.x
GroupUser.where(GroupUser.arel_table[:user_id].not_eq(me))
To shorten the length, you could store GroupUser.arel_table in a variable or if using inside the model GroupUser itself e.g., in a scope, you can use arel_table[:user_id] instead of GroupUser.are...
Checking for an empty field with MySQL
...e range access if you have lots of empty email record (both types) in your table.
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How do you run a single query through mysql from the command line?
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mysql -u <user> -p -e "select * from schema.table"
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Is “else if” faster than “switch() case”? [duplicate]
...If a switch contains more than five items, it's implemented using a lookup table or a hash list. This means that all items get the same access time, compared to a list of if:s where the last item takes much more time to reach as it has to evaluate every previous condition first.
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Escape string for use in Javascript regex [duplicate]
...d-to-test voodoo.
var escapeRegExp;
(function () {
// Referring to the table here:
// https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/regexp
// these characters should be escaped
// \ ^ $ * + ? . ( ) | { } [ ]
// These characters only have special meaning inside of b...
How to limit UITableView row reordering to a section
...ing on where the drag went, instead of where it started.
- (NSIndexPath *)tableView:(UITableView *)tableView targetIndexPathForMoveFromRowAtIndexPath:(NSIndexPath *)sourceIndexPath toProposedIndexPath:(NSIndexPath *)proposedDestinationIndexPath
{
if (sourceIndexPath.section != proposedDestination...
How to become an OpenCart guru? [closed]
...n using
$result = $this->db->query("SELECT * FROM `" . DB_PREFIX . "table`");
DB_PREFIX as the name suggests is a constant containing the database prefix if one exists
$result will return an object for SELECT queries, containing a few properties
$result->row contains the first row's da...
Rails migrations: self.up and self.down versus change
... you rollback? Of course it's remove_column. What is the inverse of create_table? It's drop_table. So in these cases rails know how to rollback and define a down method is superfluous (you can see in the documentation the methods currently supported from the change method).
But pay attention becaus...
to drawRect or not to drawRect (when should one use drawRect/Core Graphics vs subviews/images and wh
...it would be more complicated.
The general workflow should be to build the tableviews with subviews. Use Instruments to measure the frame rate on the oldest hardware your app will support. If you can't get 60fps, drop down to CoreGraphics. When you've done this for a while, you get a sense for when ...
How to set top-left alignment for UILabel for iOS application?
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Works like a charm, even in a UITableViewCell with reuse.
– alex.bour
Jun 10 '16 at 8:53
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