anonymous-function

The offending code was: <console>:47: error: wrong number of parameters; expected = 2 terms.foldLeft(r.unitA)(r.add(_, _.eval(x))) I solved my problem by writing: terms.foldLeft(r.unitA)((a,b) => r.add(a, b.eval(x))) But I'd still like to know what prevented my initial attempt? Here is the section of the SLS 6.23: http://iainmcgin.github.io/scala-ref-markdown/#placeholder-syntax-for-anonymous-functions Updated link: http://www.scala-lang.org/files/archive/spec/2.11/06-expressions.html#placeholder-syntax-for-anonymous-functions Daniel Sobral's post says: "When you use "_" as a place holder for

How to call XSLT templates inline? For instance, instead of : <xsl:call-template name="myTemplate" > <xsl:with-param name="param1" select="'val'" /> </xsl:call-template> Can I use XSLT built-in function-call style, like this: <xls:value-of select="myTeplate(param1)" /> In XSLT 2.0 you can define your own custom functions using xsl:function An article on XML.com describing how to write your own functions in XSLT 2.0: http://www.xml.com/pub/a/2003/09/03/trxml.html <xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:foo="http://whatever"> <!-- Compare two strings

I'm trying to dump elements of an object's private property through an anonymous function - of course I could achieve this in any number of other ways, but this highlights a PHP conundrum I can't solve off the top of my head, short of $foo = $this and using $foo - but THAT won't give me the private stuff, so... suggestions ? Sample code: class MyClass { private $payload = Array( 'a' => 'A element', 'b' => 'B element'); static $csvOrder = Array('b','a'); public function toCSV(){ $values = array_map( function($name) use ($this) { return $this->payload[$name]; }, self::$csvOrder ); return implode

Say I have a anonymous function f = @(x) x^2 and I want to convert this to a symbolic function. Is there a built in command for that? You could just pass it to SYM: f = @(x) x^2; g = sym(f) But then most of the symbolic functions do that automatically when they receive a function handle ( subs , int , etc...) 来源： https://stackoverflow.com/questions/11322295/how-do-i-convert-an-anonymous-function-to-a-symbolic-function-in-matlab

Background: I have a recursive function implemented by a Z-combinator as is shown here and here so it makes no use of arguments.callee since it will be deprecated in upcoming ES6 . Issue The main issue with the Z-combinator and all recursive anonymous functions I've seen so far is that they updates de this value to the inner function scope (the self-returned at the return clause), so the this that references the top level is lost, and I want to maintain it through all the inner functions. Is there a way to maintain the top level this without passing it as an additional function argument, which

I have a hash with a few values that are not scalar data but rather anonymous subroutines that return scalar data. I want to make this completely transparent to the part of the code that looks up values in the hash, so that it doesn't have to be aware that some of the hash values may be anonymous subroutines that return scalar data rather than just plain old scalar data. To that effect, is there any way to have the anonymous subroutines executed when their keys are accessed, without using any special syntax? Here's a simplified example that illustrates the goal and the problem: #!/usr/bin/perl