Thomas Gmelig Meyling tpgmeligmeyling

## KeyPaths.swift
/// Prefix operator to turn a KeyPath into a function
prefix operator ~

/// Allows a key path to be passed into mapping functions
///
///     e.g. people.map(~\.name)
///
prefix func ~<A, B>(_ keyPath: KeyPath<A, B>) -> (A) -> B {
    return { $0[keyPath: keyPath] }
}

## compress-pdf-with-gs.md

      
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                guifromrio
                / compress-pdf-with-gs.md
            
            
              Created
              August 30, 2013 14:39
            
              
                Compress PDF files with ghostscript
              
          
    This can reduce files to ~15% of their size (2.3M to 345K, in one case) with no obvious degradation of quality.
ghostscript -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/printer -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf

Other options for PDFSETTINGS:

/screen selects low-resolution output similar to the Acrobat Distiller "Screen Optimized" setting.
/ebook selects medium-resolution output similar to the Acrobat Distiller "eBook" setting.
/printer selects output similar to the Acrobat Distiller "Print Optimized" setting.
/prepress selects output similar to Acrobat Distiller "Prepress Optimized" setting.


## Semaphore.scala
class Semaphore(private var count : Int) {
  def p() {
    synchronized {
      while (count < 1) {}
      count = count - 1
    }
  }

  def v() {
    synchronized {
	/// Prefix operator to turn a KeyPath into a function
	prefix operator ~

	/// Allows a key path to be passed into mapping functions
	///
	/// e.g. people.map(~\.name)
	///
	prefix func ~<A, B>(_ keyPath: KeyPath<A, B>) -> (A) -> B {
	return { $0[keyPath: keyPath] }
	}
	class Semaphore(private var count : Int) {
	def p() {
	synchronized {
	while (count < 1) {}
	count = count - 1
	}
	}

	def v() {
	synchronized {