ayosec

Add for(value <- items) and for(value, offset <- items) to Sweet.js

Examples

for(x <- [1,2,3,4]) {
  var a = x + 10;
  print(a);
}

augustl

(import '[javax.script ScriptEngineManager])

(let [engine (.getEngineByName (ScriptEngineManager.) "nashorn")]
  (println (= (.eval engine "' \\r\\n' == 0") true)))

aaronpowell

macro null_helper {
    rule { ($processed ...) ($rest) } => {
        $processed (.) ... . $rest
    }
    rule { ($processed ...) ($rest_head $rest ...) } => {
        $processed (.) ... . $rest_head
        && null_helper ($processed ... $rest_head) ($rest ...)
    }
}
 

sritchie

(defn flatmap<
  "Takes a function and a source channel, and returns a channel which
  contains the values in each channel produced by applying f to
  each value taken from the source channel. f must return a
  channel."
  [f in]
  (let [out (a/chan)]
    (a/go-loop []
      (let [item (a/<! in)]
        (if (nil? item)

jhaberstro

// The DSL's implementation (i.e. just the applicative interface for Optionals + methods for creating tuples)
operator infix <*>  { associativity left }
@infix func <*><A, B>(lhs: (A -> B)?, rhs: A?) -> B? {
    switch lhs {
    case .None:
        return .None
    case let .Some(f):
        return rhs.map(f)
    }
}

natefaubion

macro protocol {
  case { _ $name:ident { $fn:protocol_fn ... } } => {
    // Probably not a good idea to rely on `__fresh`. Sweet.js should provide
    // some sort of blessed gensym capability.
    letstx $id = [makeValue(__fresh(), #{ here })];
    return #{
      function $name(proto, impl) {
        if (!impl) {
          impl = proto;
          proto = {};

frenchy64

Schema

I think of Schema as a runtime contracts library (I believe it does coercion and validation, but they seem related to me).

Pros

• small barrier to entry, thus immediately useful
  • just add a contract/coercion to a function and you're off
• can manipulate contracts as regular clojure data
• documentation

ceedubs

scala> case class UserId(id: Long)
defined class UserId

scala> def isSusan(id: UserId): Boolean = id == 3L // see the bug?
isSusan: (id: UserId)Boolean

scala> isSusan(UserId(3L))
res31: Boolean = false// shouldn't this be true?

// let's show the compiler how to check whether two UserIds are equal

martintrojer

(ns kebab
  (:require [camel-snake-kebab :as kebab]
            [schema.coerce :as c]
            [schema.core :as s]))

(def Data (s/either s/Keyword
                    {(s/recursive #'Data) (s/recursive #'Data)}
                    [(s/recursive #'Data)]
                    #{(s/recursive #'Data)}
                    s/Any))

diversit

    public static final Answer DEFAULT_OPTIONAL_EMPTY_ANSWER = invocation ->
            invocation.getMethod().getReturnType() == Optional.class ? Optional.empty() : null;

    Mockito.mock(YourClassWithOptionalReturnValues.class, DEFAULT_OPTIONAL_EMPTY_ANSWER);
    
    // unfortunately this does not work since Mockito's Answers enum is not extendable (yet, issue 345)
    @Mock(answer = DEFAULT_OPTIONAL_EMPTY_ANSWER)
    private YourClassWithOptionalReturnValues mockInstance;