jeffbowman

Predicate<String> notNullNorEmpty = s -> s != null && !s.isEmpty();
Predicate<String> isFull = s -> s.matches("\\S+");
Predicate<String> isIntegral = s -> s.matches("\\d+");
Predicate<String> isDecimal = s -> s.matches("\\d+\\.\\d+");
Predicate<String> isNumeric = isIntegral.or(isDecimal);
Predicate<String> notNullNumeric = notNullNorEmpty.and(isNumeric);

jeffbowman

Function<String, Integer> only3PositiveDigits = s -> {
    if (!s.matches("\\d{3}") {
        return -1;
    }
    return new Integer(s);
};

jeffbowman

Function<String , Integer> only3PositiveDigits = s -> s.matches("\\d{3}") ? new Integer(s) : -1;

jeffbowman

Supplier<Integer> alwaysOne = () -> 1;
alwaysOne.get(); // --> 1
alwaysOne.get(); // --> 1, again
alwaysOne.get(); // --> still 1

jeffbowman

class MyIndex implements Supplier<Integer> {
    private int index = 0;
    @Override
    public Integer get() { 
        return index++;
    }
}
MyIndex i = new MyIndex();
i.get(); // --> 0
i.get(); // --> 1

jeffbowman

Consumer<String> log = s -> Logger.getGlobal().info(s);
Consumer<String> toss = s -> {
    throw new IllegalArgumentException(s);
}
Consumer<String> logAndToss = log.andThen(toss);

jeffbowman

#lang racket/base
(require racket/list
         racket/sequence)

(define MAX-OVERWRITE 8)
(define overwrite-range (range MAX-OVERWRITE))

(define (get-random-bytes count)
  (with-input-from-file "/dev/urandom"
    (λ () (read-bytes count))))

jeffbowman

open System.Text.RegularExpressions
open FsUnit
open NUnit.Framework

let parseLot lot = 
    match lot with
    | x when Regex.Match(x, @"^\d+$").Success -> [ x |> int ]
    | x when Regex.Match(x, @"^\d+-\d+$").Success -> 
        let parts = x.Split('-')
        [ parts.[0] |> int..parts.[1] |> int ]

jeffbowman

<words>
    <word>123</word>
    <word>mom</word>
    <word>12321</word>
    <word>madam im adam</word>
    <word>Mom</word>
    <word>Madam I'm Adam</word>
    <word>FooBar</word>
    <word>Eva, Can I Stab Bats In A Cave?</word>
</words>

jeffbowman

mvn clean test -Dmunit.test="lambda-test-suite.xml"                                                                                                                                                                                                                            :(
[INFO] Scanning for projects...
[INFO] 
[INFO] ------------------------------------------------------------------------
[INFO] Building Mule dataweave Application 1.0.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
Downloading: http://nexusprod:8080/nexus/content/repositories/releases/org/apache/maven/plugins/maven-install-plugin/maven-metadata.xml
Downloading: http://nexusprod:8080/nexus/content/repositories/snapshots/org/apache/maven/plugins/maven-install-plugin/maven-metadata.xml
Downloading: http://repository.mulesoft.org/releases/org/apache/maven/plugins/maven-install-plugin/maven-metadata.xml
Downloading: http://nexusprod:8080/nexus/content/repositories/thirdparty/org/apache/maven/plugins/mav