From b274906134435e63794c9b0ba73afcf30f386029 Mon Sep 17 00:00:00 2001
From: David <davidaster007@gmail.com>
Date: Mon, 7 Nov 2022 15:58:32 +0100
Subject: [PATCH] =?UTF-8?q?hinzugef=C3=BCgt=20Method=20Chaining=20und=20fi?=
 =?UTF-8?q?nd=20Function?=
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---
 .../Javascript Expert/chapter11/find.js       | 48 +++++++++++++++++++
 .../chapter11/methodChaining.js               | 30 ++++++++++++
 2 files changed, 78 insertions(+)
 create mode 100644 javascript/Javascript Expert/chapter11/find.js
 create mode 100644 javascript/Javascript Expert/chapter11/methodChaining.js

diff --git a/javascript/Javascript Expert/chapter11/find.js b/javascript/Javascript Expert/chapter11/find.js
new file mode 100644
index 0000000..4d613f1
--- /dev/null
+++ b/javascript/Javascript Expert/chapter11/find.js	
@@ -0,0 +1,48 @@
+const randomIntNumbers = n => {
+  let transaktionen = [];
+  for (let i = 0; i < n; i++) {
+    const rndNum = Math.random() * 1000;
+    rndNum > Math.random() * 1000
+      ? transaktionen.push(Math.trunc(rndNum))
+      : transaktionen.push(-Math.trunc(rndNum));
+  }
+  return transaktionen;
+};
+
+const movements = randomIntNumbers(14);
+console.log(movements);
+// suche nach dem ersten Target nach der Bedienung mov > 500 (gibt nur den ersten gefundenen Wert zurück)
+console.log(movements.find(mov => mov > 500));
+
+const account1 = {
+  owner: "David Aster",
+  movements: [200, 450, -400, 3000, -650, -130, 70, 1300],
+  interestRate: 1.2, // %
+  pin: 1111,
+};
+
+const account2 = {
+  owner: "Joanne Aster",
+  movements: [5000, 3400, -150, -790, -3210, -1000, 8500, -30],
+  interestRate: 1.5,
+  pin: 2222,
+};
+
+const account3 = {
+  owner: "Nika Aster",
+  movements: [200, -200, 340, -300, -20, 50, 400, -460],
+  interestRate: 0.7,
+  pin: 3333,
+};
+
+const account4 = {
+  owner: "Eva Aster",
+  movements: [430, 1000, 700, 50, 90],
+  interestRate: 1,
+  pin: 4444,
+};
+
+const accounts = [account1, account2, account3, account4];
+// im folgenden Beispiel wird das ganze Object, das der Bedienung acc.owner ==="Nika Aster" enspricht zurück gegeben
+const account = accounts.find(acc => acc.owner === "Nika Aster");
+console.log(account);
diff --git a/javascript/Javascript Expert/chapter11/methodChaining.js b/javascript/Javascript Expert/chapter11/methodChaining.js
new file mode 100644
index 0000000..d4fcf65
--- /dev/null
+++ b/javascript/Javascript Expert/chapter11/methodChaining.js	
@@ -0,0 +1,30 @@
+const randomIntNumbers = n => {
+  let transaktionen = [];
+  for (let i = 0; i < n; i++) {
+    const rndNum = Math.random() * 1000;
+    rndNum > Math.random() * 1000
+      ? transaktionen.push(Math.trunc(rndNum))
+      : transaktionen.push(-Math.trunc(rndNum));
+  }
+  return transaktionen;
+};
+
+const eurToUsd = 1.1;
+
+const transaktionen = randomIntNumbers(20);
+console.log(transaktionen);
+
+// gleichzeitig Verwaltung der Werten die der filter Bedienung entsprechen,
+// Berechnung ins US Dollars, gemeinsame Sume der Werten in einen Wert (EUR ins US Dollars)
+const depositsInUsd = transaktionen
+  .filter((transaktion, i, arr) => {
+    return transaktion > 0;
+  })
+  // arr Parameter hilft bei Debuging
+  .map((transaktion, i, arr) => {
+    // console.log(transaktion, array);
+    return transaktion * eurToUsd;
+  })
+  .reduce((accu, cur, i) => accu + cur);
+
+console.log(depositsInUsd);