playground code updated and 1 recursion program added

Author: sanjaydeveloper15

Recursion/numbers-between-low-high.js

@@ -0,0 +1,23 @@
+// At Concentrix R1
+var a = [1, [2, [3, 4], [10, 7], 5], [9]]
+
+const findNumbers = (inputArr, low, high) => {
+    // const betweenNums = new Set();
+    const betweenNumsArr = [];
+
+    for (let i = 0; i < inputArr.length; i++) {
+        const ele = inputArr[i]
+        if (Array.isArray(ele)) {
+            betweenNumsArr.push(...findNumbers(ele, low, high))
+        } else {
+            if (ele >= low && ele <= high) {
+                betweenNumsArr.push(ele)
+            }
+        }
+    }
+
+    return betweenNumsArr;
+
+}
+
+console.log(findNumbers(a, 5, 12))

Test-Self/playground.js

@@ -1,15 +1,16 @@
-const obj = {
-    a: 10,
-    b: function () {
-      console.log(this.a);
-      const inner = () => {
-        console.log(this.a);
-      };
-      inner();
-    },
-  };
-  
-  const b = obj.b;
-  b(); // Output?
-  obj.b(); // Output?
-  
+// const obj = {
+//     a: 10,
+//     b: function () {
+//       console.log(this.a);
+//       const inner = () => {
+//         console.log(this.a);
+//       };
+//       inner();
+//     },
+//   };
+
+//   const b = obj.b;
+// b(); // Output?
+// obj.b(); // Output?
+
+console.log(typeof null, typeof undefined, typeof NaN)

Test-Self/playground.ts

@@ -192,3 +192,19 @@ const highestBirthdayCandleCounts = (inputArr: number[]): number => {
 // console.log(highestBirthdayCandleCounts([4,4,1,3]));
 
 console.info(`----- Multiple Pointers ------`)
+
+const isSubsequence = (str1: string, str2: string): boolean => {
+    if(str1.length === 0 || str2.length === 0) return false;
+    let i: number = 0, j: number = 0;
+    while(j < str2.length) {
+        if(str1[i] === str2[j]) i++;
+        if(i === str1.length) return true;
+        j++;
+    }
+    return false
+}
+
+console.log(isSubsequence('hello', 'hello world')); // true
+console.log(isSubsequence('sing', 'sting')); // true
+console.log(isSubsequence('abc', 'abracadabra')); // true
+console.log(isSubsequence('abc', 'acb')); // false (order matters)