Merge pull request #8 from kemboijs/string-return-counts-of-char

count character in a string

Author: ezkemboi

package.json

@@ -4,7 +4,7 @@
   "description": "Algorithms in Javascript",
   "main": "index.js",
   "scripts": {
-    "test": "nyc --reporter=lcov --reporter=text mocha --exit"
+    "test": "nyc --reporter=lcov --reporter=text mocha **/*.test.js --exit"
   },
   "repository": {
     "type": "git",
@@ -27,5 +27,8 @@
     "chai": "^4.2.0",
     "mocha": "^7.0.1",
     "nyc": "^15.0.0"
+  },
+  "nyc": {
+    "exclude": "**/*.test.js"
   }
 }

parsestringtoarray/index.test.js

@@ -0,0 +1,8 @@
+const { assert, expect } = require("chai");
+const totalAgeValue = require("./reduce");
+
+describe("string return char counts", () => {
+    it("should return true for testing", () => {
+        expect(true).to.equal(true);
+    });
+});

reduce/index.test.js

@@ -37,12 +37,14 @@ const peopleInCommunity = [
  *  Read more on: 
  *  https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce
  */
+/**
+ * write this as a function before writing testing
+ */
 const totalAgeValue = peopleInCommunity.reduce(
     // Destructure age and noOfPeople from peopleInCommunity array
     (accumulator, { age, noOfPeople }) =>
         //  Multiply the age and noOfPeople and add to accumulator
         accumulator + (age * noOfPeople)
     , 0)
 
-// Log value of total age manipulations
-console.log('Average age: ', totalAgeValue)
+exports = module.exports = totalAgeValue;

reduce/reduce.js

@@ -0,0 +1,14 @@
+const { expect, assert } = require("chai");
+const charCounts = require("./solution");
+const charCountsForOf = require("./solutionforof");
+
+describe("string return char counts", () => {
+    it("should return counts", () => {
+        const str = "string to Count. Here we are + me S3456.!"
+        const counts = charCounts(str);
+        const countsForOf = charCountsForOf(str);
+        // Need to add more test cases ->
+        expect(counts.e).to.equal(5);
+        assert(counts.c, countsForOf.c);
+    });
+});

stringreturncountsofchar/index.test.js

@@ -0,0 +1,4 @@
+This part contains the question
+
+-> write a function which takes a string and returns
+    counts of each character in the string

stringreturncountsofchar/question.txt

@@ -0,0 +1,24 @@
+/**
+ * The problem to this question is found inside
+ * question.txt
+ */
+const charCounts = (str) => {
+    let result = {};
+    for (let i = 0; i < str.length; i++) {
+        // have regex to check for only alphanumeric
+        const regexAlphaNumeric = /^[a-z0-9]+$/i;
+        // assign character and make sure we lower case them
+        const character = str[i].toLowerCase();
+        if (regexAlphaNumeric.test(character)) {
+            if (result[character] > 0) {
+                // if result is greater than 0, we should add one
+                result[character]++;
+            } else {
+                result[character] = 1;
+            }
+        }
+    }
+    return result;
+};
+
+exports = module.exports = charCounts;

stringreturncountsofchar/solution.js

@@ -0,0 +1,24 @@
+/**
+ * The problem to this question is found inside
+ * question.txt
+ */
+const charCountsForOf = (str) => {
+    let result = {};
+    for (let character of str) {
+        // have regex to check for only alphanumeric
+        const regexAlphaNumeric = /^[a-z0-9]+$/i;
+        // assign character and make sure we lower case them
+        character = character.toLowerCase();
+        if (regexAlphaNumeric.test(character)) {
+            if (result[character] > 0) {
+                // if result is greater than 0, we should add one
+                result[character]++;
+            } else {
+                result[character] = 1;
+            }
+        }
+    }
+    return result;
+};
+
+exports = module.exports = charCountsForOf;

stringreturncountsofchar/solutionforof.js

@@ -1,5 +1,5 @@
 const { assert, expect } = require("chai");
-const { firstApproach, secondApproach } = require("../sumnumbersupton");
+const { firstApproach, secondApproach } = require(".");
 
 describe("sum of numbers upto n", () => {
     it("should test first approach to be mathematically true", () => {