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Adding 'serial' to existing column in Postgres
... b text);
INSERT INTO foo (a, b) SELECT i, 'foo ' || i::text FROM generate_series(1, 5) i;
INSERT INTO bar (b) SELECT 'bar ' || i::text FROM generate_series(1, 5) i;
-- blocks of commands to turn foo into bar
CREATE SEQUENCE foo_a_seq;
ALTER TABLE foo ALTER COLUMN a SET DEFAULT nextval('foo_a_seq'...
Difference between ProcessBuilder and Runtime.exec()
...sn't work: List<String> params = java.util.Arrays.asList(installation_path+uninstall_path+uninstall_command, uninstall_arguments); Process qq=new ProcessBuilder(params).start();
– gal
Jul 28 '11 at 9:50
...
An async/await example that causes a deadlock
...u:
So this is what happens, starting with the top-level method (Button1_Click for UI / MyController.Get for ASP.NET):
The top-level method calls GetJsonAsync (within the UI/ASP.NET context).
GetJsonAsync starts the REST request by calling HttpClient.GetStringAsync (still within the con...
JavaScript function order: why does it matter?
...t): https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Scope_Cheatsheet
This weird behavior depends on
How you define the functions and
When you call them.
Here's some examples.
bar(); //This won't throw an error
function bar() {}
foo(); //This will throw an error
var foo = f...
nginx upload client_max_body_size issue
...maximum size of files I want uploaded.
To do that, I set the nginx client_max_body_size to 1m (1MB) and expect a HTTP 413 (Request Entity Too Large) status in response when that rule breaks.
...
Custom attributes in styles.xml
...
<style name="CustomStyle">
<item name="android:layout_width">wrap_content</item>
<item name="android:layout_height">wrap_content</item>
<item name="custom_attr">value</item> <!-- tee hee -->
</style>
</resourc...
When to use static classes in C# [duplicate]
...h. Become like water my friend.” - Bruce Lee
– Chef_Code
Sep 19 '16 at 20:21
4
@Chef_Code I'm s...
Waiting until two async blocks are executed before starting another block
...y Programming Guide
Your example could look something like this:
dispatch_group_t group = dispatch_group_create();
dispatch_group_async(group,dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^ {
// block1
NSLog(@"Block1");
[NSThread sleepForTimeInterval:5.0];
NSLog(@"Bl...
What does passport.session() middleware do?
...r/lib/strategies/session.js
Specifically lines 59-60:
var property = req._passport.instance._userProperty || 'user';
req[property] = user;
Where it essentially acts as a middleware and alters the value of the 'user' property in the req object to contain the deserialized identity of the user. To ...
phpunit mock method multiple calls with different arguments
...on Query($sSql) {
return "";
}
}
class fooTest extends PHPUnit_Framework_TestCase {
public function testMock() {
$mock = $this->getMock('DB', array('Query'));
$mock
->expects($this->exactly(2))
->method('Query')
-&g...