Section 05 : JSON - Part 01

Author: Farahat612

5. JSON/20 2727. Is Object Empty.js

@@ -0,0 +1,12 @@
+var isEmpty = function (obj) {
+  if (Array.isArray(obj)) {
+    // Check if the array has zero elements
+    return obj.length === 0
+  } else if (typeof obj === 'object' && obj !== null) {
+    // Check if the object has zero key-value pairs
+    return Object.keys(obj).length === 0
+  } else {
+    // If obj is neither an array nor an object, it's considered empty
+    return true
+  }
+}

5. JSON/21 2677. Chunk Array.js

@@ -0,0 +1,18 @@
+var chunk = function (arr, size) {
+  const chunkedArray = []
+  let index = 0
+
+  while (index < arr.length) {
+    let count = size
+    const temp = []
+
+    while (count-- > 0 && index < arr.length) {
+      temp.push(arr[index])
+      index++
+    }
+
+    chunkedArray.push(temp)
+  }
+
+  return chunkedArray
+}

5. JSON/22 2619. Array Prototype Last.js

@@ -0,0 +1,6 @@
+Array.prototype.last = function () {
+  if (this.length) {
+    return this[this.length - 1]
+  }
+  return -1
+}

5. JSON/23 2631. Group By.js

@@ -0,0 +1,9 @@
+Array.prototype.groupBy = function (fn) {
+  const result = {}
+  for (const obj of this) {
+    const key = fn(obj)
+    result[key] = result[key] || []
+    result[key].push(obj)
+  }
+  return result
+}