reduce

last-endcode · last-endcode · commit 8882ccfdeb70 · 2020-10-17T18:23:02.000+07:00
diff --git a/39_array_reduce.js b/39_array_reduce.js
@@ -0,0 +1,27 @@
+// reduce
+// iterates,callback function
+// reduces to a single value - number, array, obj
+// 1 parameter('acc') - total of all calculations
+// 2 parameter ('curr) - current iteration/value
+
+const produk = [
+  { name: 'samsung', model: 'android', price: 10000 },
+  { name: 'xiaomi', model: 'android', price: 20000 },
+  { name: 'iphone', model: 'iphone', price: 30000 },
+  { name: 'sony', model: 'android', price: 40000 },
+];
+
+let result = produk.reduce(function (acc, current) {
+  console.log(acc + current.price);
+  return acc;
+});
+
+console.log(result);
+
+// // example method channing
+// let result = produk
+//   .filter(items => items.price > 10000)
+//   .map(items => items.price * 2)
+//   .reduce((acc, current) => acc + current);
+
+// console.log(result);
