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Find the nth occurrence of substring in a string
...that can't match the needle) one-liner:
'foo bar bar bar'.replace('bar', 'XXX', 1).find('bar')
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How can I trim leading and trailing white space?
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# Returns string without leading white space
trim.leading <- function (x) sub("^\\s+", "", x)
# Returns string without trailing white space
trim.trailing <- function (x) sub("\\s+$", "", x)
# Returns string without leading or trailing white space
trim <- function (x) gsub("^\\s+|\\s+$",...
What are type lambdas in Scala and what are their benefits?
...he time when you are working with higher-kinded types.
Consider a simple example of defining a monad for the right projection of Either[A, B]. The monad typeclass looks like this:
trait Monad[M[_]] {
def point[A](a: A): M[A]
def bind[A, B](m: M[A])(f: A => M[B]): M[B]
}
Now, Either is a t...
How to validate an email address in JavaScript
Is there a regular expression to validate an email address in JavaScript?
95 Answers
9...
What are 'get' and 'set' in Swift?
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That's actually explained right before the code:
In addition to simple properties that are stored, properties can have a getter and a setter.
class EquilateralTriangle: NamedShape {
...
When some other class wants to get that perimete...
How do I make my GUI behave well when Windows font scaling is greater than 100%
...ere are problems in a VCL application, every time something has been set pixelwise.
4 Answers
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Can you Run Xcode in Linux?
Can you run Xcode in Linux? Mac OS X was based on BSD Unix, so is it possible?
13 Answers
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How to select the row with the maximum value in each group
...iple observations for each subject I want to take a subset with only the maximum data value for each record. For example, with a following dataset:
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Drawing a line/path on Google Maps
...otected boolean isRouteDisplayed() {
return false;
}
class MyOverlay extends Overlay{
public MyOverlay(){
}
public void draw(Canvas canvas, MapView mapv, boolean shadow){
super.draw(canvas, mapv, shadow);
Paint mPaint = new Paint();
mPaint.setDither(...
Is it possible to override JavaScript's toString() function to provide meaningful output for debuggi
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You can override toString in Javascript as well. See example:
function Foo() {}
// toString override added to prototype of Foo class
Foo.prototype.toString = function() {
return "[object Foo]";
}
var f = new Foo();
console.log("" + f); // console displays [object Foo]
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