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Why does Math.round(0.49999999999999994) return 1?
....printf("%016x\n", Double.doubleToLongBits(d));
}
public static void main(String args[]) {
double a = 0.5;
double b = 0.49999999999999994;
print(a); // 3fe0000000000000
print(b); // 3fdfffffffffffff
print(a+b); // 3ff0000000000000
print(1.0); // 3ff000000000...
Android Preferences: How to load the default values when the user hasn't used the preferences-screen
...
Be aware that if you are using
getSharedPreferences(String sharedPreferencesName, int sharedPreferencesMode)
to retrieve preferences you have to use
PreferenceManager.setDefaultValues(Context context, String sharedPreferencesName, int sharedPreferencesMode, int resId, boolea...
How to check if APK is signed or “debug build”?
...}
Add this method:
public static boolean isDebug(Context context) {
String pName = context.getPackageName();
if (pName != null && pName.endsWith(".debug")) {
return true;
} else {
return false;
}
}
...
Assign an initial value to radio button as checked
...he model value in the controller to "true". Watch out that you set it to a string, not a Boolean!
– Thomas David Kehoe
Feb 17 '18 at 23:40
add a comment
| ...
Cannot use ref or out parameter in lambda expressions
...tured variables:
delegate void TestDelegate (out int x);
static void Main(string[] args)
{
TestDelegate testDel = (out int x) => { x = 10; };
int p;
testDel(out p);
Console.WriteLine(p);
}
share
...
Access Container View Controller from Parent iOS
...(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
NSString * segueName = segue.identifier;
if ([segueName isEqualToString: @"alertview_embed"]) {
AlertViewController * childViewController = (AlertViewController *) [segue destinationViewController];
AlertView *...
finding and replacing elements in a list
...lex operations on the list items. For example, if each list item is a long string that need some kind of search and replacement.
– not2qubit
Nov 19 '18 at 6:50
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...
Multiple inputs with same name through POST in php
...wer in POSTing Form Fields with same Name Attribute you also can interplay strings or integers without quoting.
The answers assume that you don't mind the key value coming back for PHP however you can set name=[yourval] (string or int) which then allows you to refer to an existing record.
...
Default function arguments in Rust
...1.8;
let mut weight = 77.11;
let mut name = "unspecified".to_string();
for opt in args {
match opt {
Height(h) => height = *h,
Weight(w) => weight = *w,
Name(n) => name = n.to_string(),
}
}
println!(" name:...
Is there any publicly accessible JSON data source to test with real world data? [closed]
... sample
HTML
<div id="images">
</div>
Javascript
// Querystring, "tags" search term, comma delimited
var query = "http://www.flickr.com/services/feeds/photos_public.gne?tags=soccer&format=json&jsoncallback=?";
// This function is called once the call is satisfied
// http:...