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Image, saved to sdcard, doesn't appear in Android's Gallery app
...canFile():
File imageFile = ...
MediaScannerConnection.scanFile(this, new String[] { imageFile.getPath() }, new String[] { "image/jpeg" }, null);
where this is your activity (or whatever context), the mime-type is only necessary if you are using non-standard file extensions and the null is for th...
Call a controller function from a directive without isolated scope in AngularJS
...on,
<button ... confirm-action="doIt()">Do It</button>
is the string "doIt()", and you can't call a string, e.g. "doIt()"().
Your question really is:
How do I call a function when I have its name as a string?
In JavaScript, you mostly call functions using dot notation, like this:
some...
How can I determine if a date is between two dates in Java? [duplicate]
...
Here you go:
public static void main(String[] args) throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy");
String oeStartDateStr = "04/01/";
String oeEndDateStr = "11/14/";
Calendar cal = Calendar.ge...
How can you find the height of text on an HTML canvas?
...l it is. I know it's based on the font, but I don't know to convert a font string to a text height.
23 Answers
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Perform .join on value in array of objects
If I have an array of strings, I can use the .join() method to get a single string, with each element separated by commas, like so:
...
Setting the default Java character encoding
...p; by the time your main method is entered, the character encoding used by String.getBytes() and the default constructors of InputStreamReader and OutputStreamWriter has been permanently cached.
As Edward Grech points out, in a special case like this, the environment variable JAVA_TOOL_OPTIONS can ...
When to use in vs ref vs out
... difference, an out parameter needs not be initialized.
Example for out:
string a, b;
person.GetBothNames(out a, out b);
where GetBothNames is a method to retrieve two values atomically, the method won't change behavior whatever a and b are. If the call goes to a server in Hawaii, copying the in...
Multiple left-hand assignment with JavaScript
...
a = (b = 'string is truthy'); // b gets string; a gets b, which is a primitive (copy)
a = (b = { c: 'yes' }); // they point to the same object; a === b (not a copy)
(a && b) is logically (a ? b : a) and behaves like multipl...
Get the current URL with JavaScript?
...w works, but it is bugged for Firefox.
document.URL;
See URL of type DOMString, readonly.
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Regular expression to match balanced parentheses
... are many nested parenthesis (...(..)..(..)..(..)..(..)..)) in the subject string), you can use a simple non-capturing group and enclose all in an atomic group: (?>(?:[^)(]+|\g<1>)*) (this behaves exactly like a possessive quantifier). In Ruby 2.x, the possessive quantifier is available.
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