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How do I clone a Django model instance object and save it to the database?
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I had to set both obj.pk and obj.id to make this work in Django 1.4
– Petr Peller
Jan 10 '14 at 18:00
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How to find controls in a repeater header or footer
...etter solution
You can check item type in ItemCreated event:
protected void rptSummary_ItemCreated(Object sender, RepeaterItemEventArgs e) {
if (e.Item.ItemType == ListItemType.Footer) {
e.Item.FindControl(ctrl);
}
if (e.Item.ItemType == ListItemType.Header) {
e.Item.Fi...
Difference between $(this) and event.target?
...r').click( handler );
then the handler will be invoked when you click inside the outer div as well as the inner one (unless you have other code that handles the event on the inner div and stops propagation).
In this example, when you click inside the inner div, then in the handler:
this refers ...
OAuth secrets in mobile apps
...r provision and disabling apps. If our secret is compromised, then the provider can only really revoke the entire app. Since we have to embed our secret in the desktop app, we are sorta screwed.
The solution is to have a different secret for each desktop app. OAuth doesn't make this concept easy. ...
Change Image of ImageView programmatically in Android
... @Brave's answer is correct. Using setBackgroundResource() :( did not remove the existing image before using the new image.. so I got two images colliding there. setImageResource() worked tho :). Still .. the post got me on the right track - my thanks for both answers!
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Why are nested weights bad for performance? Alternatives?
...ted weights are bad for performance because:
Layout weights require a widget to be measured twice. When a
LinearLayout with non-zero weights is nested inside another
LinearLayout with non-zero weights, then the number of measurements
increase exponentially.
It's better to use RelativeLay...
How do you write a migration to rename an ActiveRecord model and its table in Rails?
... @mathee: yes, you have to change that manually, or using an IDE that can do Ruby refactoring and commit it to your version control system.
– pupeno
Apr 30 '10 at 9:00
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int to hex string
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Try C# string interpolation introduced in C# 6:
var id = 100;
var hexid = $"0x{id:X}";
hexid value:
"0x64"
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“cannot resolve symbol R” in Android Studio
In every instance in all of my classes where I reference R.id.something , the R is in red and it says "cannot resolve symbol R". Also every time there is R.layout.something it is underlined in red and says "cannot resolve method setContentView(?)". The project always builds fine. It is annoyin...
Does a UNIQUE constraint automatically create an INDEX on the field(s)?
...e keys are in fact B-tree type indexes.
A composite index on (email, user_id) is enough, you don't need a separate index on email only - MySQL can use leftmost parts of a composite index. There may be some border cases where the size of an index can slow down your queries, but you should not worry ...