Update examples

Author: aNNiMON

README.md

@@ -105,11 +105,10 @@ for y : 1 .. 10 {
 Easy async HTTP requests with `http` module.
 
 ```scala
-use std, http, functional
+use std, http, functional, json
 
 // GET request
 http("https://api.github.com/events", def(r) {
-  use json
   events = jsondecode(r)
   println events[0]
 })

examples/functions/groupby.own

@@ -0,0 +1,12 @@
+use std, functional
+
+data = ["apple", "banana", "cherry", "apricot", "coconut"]
+println groupby(data, def(str) = str.substring(0, 1))
+
+map = {"abc": 123, "test1": 234, "test2": 345, "test3": 456, "def": 567}
+println groupby(map, def(k, v) = k.startsWith("test"))
+
+arr = [1, 2, 3, 4, 1, 2, 3, 1, 2, 3]
+result = groupby(arr, def(v) = v % 2 == 0)
+println "even: " + result[true]
+println "odd: " + result[false]

examples/functions/tomap.own

@@ -0,0 +1,8 @@
+use std, functional
+
+data = ["apple", "banana", "cherry", "apricot", "coconut"]
+println tomap(data, def(str) = str.substring(0, 1))
+println tomap(data, def(str) = str.substring(0, 1), ::toUpperCase)
+println tomap(data, def(str) = str.substring(0, 1), ::toUpperCase, ::joinValues)
+
+def joinValues(oldValue, newValue) = oldValue + ", " + newValue

examples/versions/whatsnew_2.0.0.own

@@ -0,0 +1,46 @@
+use std
+
+title("Breaking changes")
+println "Minimal Java version is 17"
+println "Simplified use statement: use std, math"
+println "More strict lexer"
+
+title("Changes")
+println "Support for long number declaration:"
+println "  Int overflow: " + (1000000*7000)
+println "  Long " + (1000000*7000L)
+println "Better error visualizing"
+println "Semantic linter as a required stage"
+println "Preserve the order of Map elements by default:"
+map = {"first": 1, "second": 2, "third": 3}
+println "  " + map
+println "Ability to run programs from resources by adding \"resource:\" prefix to path"
+println "Added internal scripts and command `ownlang run` to run them"
+include "resource:/scripts/listscripts.own"
+
+title("Modules")
+println "std::parseDouble:"
+println "  -.2e5: " + parseDouble("-.2e5")
+println "std::nanotime:"
+println "  " + nanotime()
+println "std::getenv"
+println "  Env.variable JAVA_HOME: " + getenv("JAVA_HOME", "N/A")
+println "std::getprop"
+println "  Property ownlangScript: " + getenv("ownlangScript", "N/A")
+println "http::httpSync"
+
+println "functional"
+println "  groupby, tomap"
+println "functional Stream"
+println "  groupBy, filterNot, forEachIndexed, toMap, anyMatch, allMatch, noneMatch"
+
+println "canvasfx works for Java 17+ (Windows only)"
+println "new server module"
+
+// helpers
+def title(s) {
+  println "\n"
+  println "=" * s.length
+  println s
+  println "=" * s.length
+}