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Adding 'serial' to existing column in Postgres
... answer.
A non-interactive solution
Just adding to the other two answers, for those of us who need to have these Sequences created by a non-interactive script, while patching a live-ish DB for instance.
That is, when you don't wanna SELECT the value manually and type it yourself into a subsequent C...
IOS: create a UIImage or UIImageView with rounded corners
...dius;
yourImageView.clipsToBounds = YES;
See the CALayer class reference for more info.
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How to change position of Toast in Android?
... a
Gravity constant, an x-position offset, and a y-position offset.
For example, if you decide that the toast should appear in the
top-left corner, you can set the gravity like this:
toast.setGravity(Gravity.TOP|Gravity.LEFT, 0, 0);
If you want to nudge the position to the right, inc...
jQuery textbox change event doesn't fire until textbox loses focus?
...u wanted to be pedantic about it, you should also bind to mouseup to cater for dragging text around, and add a lastValue variable to ensure that the text actually did change:
var lastValue = '';
$("#textbox").on('change keyup paste mouseup', function() {
if ($(this).val() != lastValue) {
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How to chain scope queries with OR instead of AND?
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and just for safety's sake, it's worth expressing this as Person.where("name = ? OR lastname = ?", 'John', 'Smith')
– CambridgeMike
Nov 9 '11 at 3:55
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Best way to synchronize local HTML5 DB (WebSQL Storage, SQLite) with a server (2 way sync) [closed]
I am developing a mobile web application (for iPhone & Android) with a local database (using html5 webstorage) so my app is still usable when the user is offline.
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The property 'value' does not exist on value of type 'HTMLElement'
... = (document.getElementById(elementId)).value;
i.e. containing no type information.
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Determine if an element has a CSS class with jQuery
...ched literally against the collection's elements' className string. So if, for instance, you have an element,
<span class="foo bar" />
then this will return true:
$('span').hasClass('foo bar')
and these will return false:
$('span').hasClass('bar foo')
$('span').hasClass('foo bar')
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iPhone : How to detect the end of slider drag?
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You can add an action that takes two parameters, sender and an event, for UIControlEventValueChanged:
[slider addTarget:self action:@selector(onSliderValChanged:forEvent:) forControlEvents:UIControlEventValueChanged]
Then check the phase of the touch object in your handler:
- (void)onSlider...
Is there any way to call a function periodically in JavaScript?
...val. Functions should almost always be used in favor of a string argument, for efficiency, security, and for their closure features.
– Jason S
Aug 3 '09 at 20:55
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