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Ruby: Easiest Way to Filter Hash Keys?
...ou have the keys in a separate list, you can use the * notation:
keys = [:foo, :bar]
hash1 = {foo: 1, bar:2, baz: 3}
hash2 = hash1.slice(*keys)
=> {foo: 1, bar:2}
As other answers stated, you can also use slice! to modify the hash in place (and return the erased key/values).
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Struct like objects in Java
...ck such methods in your tests. If you create a new class you might not see all possible actions. It's like defensive programming - someday getters and setters may be helpful, and it doesn't cost a lot to create/use them. So they are sometimes useful.
In practice, most fields have simple getters and...
How do you unit test a Celery task?
... in Django is:
from django.test import TestCase, override_settings
from .foo import foo_celery_task
class MyTest(TestCase):
@override_settings(CELERY_ALWAYS_EAGER=True)
def test_foo(self):
self.assertTrue(foo_celery_task.delay())
...
AngularJS. How to call controller function from outside of controller component
How I can call function defined under controller from any place of web page (outside of controller component)?
10 Answers
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Convert file path to a file URI?
...e paths. So you can just do the following:
var uri = new System.Uri("c:\\foo");
var converted = uri.AbsoluteUri;
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C++ Dynamic Shared Library on Linux
...were for a plugin system, you would use MyClass as a base class and define all the required functions virtual. The plugin author would then derive from MyClass, override the virtuals and implement create_object and destroy_object. Your main application would not need to be changed in any way.
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How do you set a default value for a MySQL Datetime column?
... need to ALWAYS specify a value for this column or the value will automatically reset itself to "now()" on update. This means that if you do not want the value to change, your UPDATE statement must contain "[your column name] = [your column name]" (or some other value) or the value will become "now(...
error: passing xxx as 'this' argument of xxx discards qualifiers
...w. I have a coworker who refers to me as the "const-able". 8v) Change that foo obj; to const foo obj; once and see what happens. Or pass a const reference to a foo.
– Fred Larson
May 12 '11 at 5:06
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PHP code to convert a MySQL query to CSV [closed]
...
SELECT * INTO OUTFILE "c:/mydata.csv"
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
LINES TERMINATED BY "\n"
FROM my_table;
(the documentation for this is here: http://dev.mysql.com/doc/refman/5.0/en/select.html)
or:
$select = "SELECT * FROM table_name";
$export = mysql_query ( $sel...
Cross-Domain Cookies
...erver side you need to have the following headers:
header("Access-Control-Allow-Origin: http://origin.domain:port");
header("Access-Control-Allow-Credentials: true");
header("Access-Control-Allow-Methods: GET, POST");
header("Access-Control-Allow-Headers: Content-Type, *");
Within the PHP-file yo...