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Pure virtual function with implementation
...f() means that B may use it to define f().
– fearless_fool
Jan 6 '15 at 5:46
2
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Get record counts for all tables in MySQL database
...
SELECT SUM(TABLE_ROWS)
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA = '{your_db}';
Note from the docs though: For InnoDB tables, the row count is only a rough estimate used in SQL optimization. You'll need to use COUNT(*) ...
How to run SQL script in MySQL?
... This is what worked for me...source C:/Users/macombers/Downloads/midcoast_db.sql;
– Zack Macomber
Oct 3 '14 at 15:09
...
rails 3 validation on uniqueness on multiple attributes
...
In Rails 2, I would have written:
validates_uniqueness_of :zipcode, :scope => :recorded_at
In Rails 3:
validates :zipcode, :uniqueness => {:scope => :recorded_at}
For multiple attributes:
validates :zipcode, :uniqueness => {:scope => [:recorded_at...
Get TransactionScope to work with async / await
...on.Enabled))
{
// connection
using (var connection = new SqlConnection(_connectionString))
{
// open connection asynchronously
await connection.OpenAsync();
using (var command = connection.CreateCommand())
{
command.CommandText = ...;
// run command asynchronously...
Objective-C: difference between id and void *
...tructures, this can be a critical difference. Declaring iVars like void *_superPrivateDoNotTouch; will cause premature reaping of objects if _superPrivateDoNotTouch is actually an object. Don't do that.
attempting to invoke a method on a reference of void * type will barf up a compiler warning.
a...
Is it possible to use AutoLayout with UITableView's tableHeaderView?
...
- (void)viewDidLoad {
[super viewDidLoad];
// ....
dispatch_async(dispatch_get_main_queue(), ^{
_profileView = [[MyView alloc] initWithNib:@"MyView.xib"];
self.tableView.tableHeaderView = self.profileView;
});
}
Note: It fix the bug when the loaded view has a fi...
How do I send a POST request as a JSON?
... 6]
}
req = urllib2.Request('http://example.com/api/posts/create')
req.add_header('Content-Type', 'application/json')
response = urllib2.urlopen(req, json.dumps(data))
Python 3.x
https://stackoverflow.com/a/26876308/496445
If you don't specify the header, it will be the default application/x...
How can I switch themes in Visual Studio 2012
...still change it by doing the following...
Going to the registry key: HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\11.0_Config\Themes (or whichever version of VS you are using)
Export the key of the theme you want (it's a bunch of random letters / numbers) to a .reg file.
Then copy the "high c...
docker error: /var/run/docker.sock: no such file or directory
... run the container.
I am on mac, installed boot2docker and have the DOCKER_HOST env set up.
11 Answers
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