Short lambda

short-lambda.js

/**
 * Short notation for expression funargs - λ
 * (not for production use, but just for fun,
 * since closures are not supported -> only
 * operations on passed argument "x")
 *
 * by Dmitry A. Soshnikov
 */

function λ(code) {
  return Function('x', 'return ' + code);
}


// tests

[1, 2, 3, 4].map(λ('x * 2')); // [2, 4, 6, 8]

Забавно придумано, но все-таки eval