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When to call activity context OR application context?
...istener for a Button in an Activity) and need a Context. Rather than using MyActivity.this to get at the outer class' this, they use getApplicationContext() or getBaseContext() to get a Context object.
You only use getApplicationContext() when you know you need a Context for something that may live...
Android: disabling highlight on listView click
...e the orange highlight that occurs when touching a listView row. So far in my xml I have tried the following:
15 Answers
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Sorting a vector in descending order
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@OfekGila My understanding is that big-O notation is about sets of functions, and notation involving = and + are just conveniences meaning ∈ and ∪. In that case, O(n*log(n)) + O(n) is a convenient notation for O(n*log(n)) ∪ O(n)...
Detect if the app was launched/opened from a push notification
...e app is just in the background or not running at all so this answer suits my needs perfectly. Tested on iOS 7 & 8
– Newtz
Feb 2 '15 at 22:42
16
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string to string array conversion in java
...urn empty string as [0] and it works fine. Is there any difference between my regular expression splitter and yours?
– Behzad
Jan 12 '13 at 22:42
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How to delete last character in a string in C#?
...k It solved the root problem, versus answering the question in the title. My complaint: if you are going to be fluent, why not just do it all in one line.
– Graham
Jul 24 '15 at 21:34
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How do I change the color of the text in a UIPickerView under iOS 7?
...orComponent component: Int) -> NSAttributedString? {
let string = "myString"
return NSAttributedString(string: string, attributes: [NSForegroundColorAttributeName:UIColor.white])
}
Swift 4:
func pickerView(_ pickerView: UIPickerView, attributedTitleForRow row: Int, forComponent compon...
Efficient evaluation of a function at every cell of a NumPy array
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@Gabriel Just throwing np.vectorize on my function (which utilizes RK45) gives me a speed up of a factor of ~ 20.
– Suuuehgi
Nov 9 '18 at 10:48
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Rails layouts per action?
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You can use a method to set the layout.
class MyController < ApplicationController
layout :resolve_layout
# ...
private
def resolve_layout
case action_name
when "new", "create"
"some_layout"
when "index"
"other_layout"
else
...
Confusion: @NotNull vs. @Column(nullable = false) with JPA and Hibernate
...
Thanks! So if I want my JPA persistence not to be tied to the Hibernate implementation (i.e. change to EJB3) then I have to use both annotations (to prohibit null in both the field and its column)?
– rapt
Se...