jan-11 homework

.vscode/launch.json

@@ -1,14 +1,14 @@
-{
-    "version": "0.2.0",
-    "configurations": [
-        {
-            "type": "node",
-            "request": "launch",
-            "name": "Launch Program",
-            "program": "${file}",
-            "skipFiles": [
-               "node_modules", "assertion.js"
-            ]
-        }
-    ]
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Launch Program",
+            "program": "${file}",
+            "skipFiles": [
+               "node_modules", "assertion.js"
+            ]
+        }
+    ]
 }

problems/problem1.js

@@ -1,27 +1,36 @@
-var assert = require('assert');
-
-// we need 5 test cases. I provided 1 input
-let inputs = [
-  ""
-]
-
-let outputs = [
-
-]
-
-// Make this function return the first letter of the string that is passed to it. If the string does not have a first letter, return undefined
-function f(str) {
-
-}
-
-function runTest(i) {
-    var expected = outputs[i];
-    var actual = f(inputs[i]);
-    assert.deepEqual(actual, expected);
-}
-
-runTest(0);
-runTest(1);
-runTest(2);
-runTest(3);
-runTest(4);
+var assert = require('assert');
+
+// we need 5 test cases. I provided 1 input
+let inputs = [
+  "abc",
+  "123",
+  "!ok",
+  "1a^",
+  ""
+]
+
+let outputs = [
+  "a",
+  "1",
+  "!",
+  "1",
+  undefined
+]
+
+// Make this function return the first letter of the string that is passed to it. If the string does not have a first letter, return undefined
+function f(str) {
+    var char1 = str[0];
+    return char1;
+}
+
+function runTest(i) {
+    var expected = outputs[i];
+    var actual = f(inputs[i]);
+    assert.deepEqual(actual, expected);
+}
+
+runTest(0);
+runTest(1);
+runTest(2);
+runTest(3);
+runTest(4);

problems/problem10.js

@@ -1,35 +1,48 @@
-var assert = require('assert');
-
-// we need 5 test cases. 
-let inputs = [
-
-]
-
-let outputs = [
-
-]
-
-/*
-Make this function return the input string, capitalized. You must use a for loop. For example:
-
-f("hello world"); // Hello World
-f("ALL YOUR BASE ARE BELONG"); // All Your Base Are Belong
-
-*/
-function f(str) {
-
-}
-
-function runTest(i) {
-    if(i > inputs.length) throw new Error("You do not have enough test cases");
-    var expected = outputs[i];
-    var actual = f(inputs[i]);
-    assert.deepEqual(actual, expected);
-}
-
-runTest(0);
-runTest(1);
-runTest(2);
-runTest(3);
-runTest(4);
-
+var assert = require('assert');
+
+// we need 5 test cases. 
+let inputs = [
+  'hello there',
+  'alOha',
+  '',
+  'bOnjOur aMIGO',
+  'h3ll0'
+]
+
+let outputs = [
+  'Hello There',
+  'Aloha',
+  '',
+  'Bonjour Amigo',
+  'H3ll0'
+]
+
+/*
+Make this function return the input string, capitalized. You must use a for loop. For example:
+
+f("hello world"); // Hello World
+f("ALL YOUR BASE ARE BELONG"); // All Your Base Are Belong
+
+*/
+function f(str) {
+    str = str.toLowerCase().split(' ');
+    for (var i=0; i<str.length; i++) {
+        str[i] = str[i].charAt(0).toUpperCase() + str[i].substring(1);
+    }
+    str = str.join(' ');
+    return str;
+}
+
+function runTest(i) {
+    if(i > inputs.length) throw new Error("You do not have enough test cases");
+    var expected = outputs[i];
+    var actual = f(inputs[i]);
+    assert.deepEqual(actual, expected);
+}
+
+runTest(0);
+runTest(1);
+runTest(2);
+runTest(3);
+runTest(4);
+

problems/problem11.js

@@ -1,31 +1,44 @@
-var assert = require('assert');
-
-// we need 5 test cases. 
-let inputs = [
-
-]
-
-let outputs = [
-
-]
-
-/*
-Make this function return the sum of all the numbers in the input array. If any element in the array is not a number, skip it. If the array is empty, return zero.
-*/
-function f(arr) {
-
-}
-
-function runTest(i) {
-    if(i > inputs.length) throw new Error("You do not have enough test cases");
-    var expected = outputs[i];
-    var actual = f(inputs[i]);
-    assert.deepEqual(actual, expected);
-}
-
-runTest(0);
-runTest(1);
-runTest(2);
-runTest(3);
-runTest(4);
-
+var assert = require('assert');
+
+// we need 5 test cases. 
+let inputs = [
+  [0, 5, 15],
+  [2, -3],
+  [1, 'plus', 1],
+  ['ok', 6, 15, 'ok'],
+  [] //what should we do if ALL elements are not numbers? Treat as empty?
+]
+
+let outputs = [
+  20,
+  -1,
+  2,
+  21,
+  0
+]
+
+/*
+Make this function return the sum of all the numbers in the input array. If any element in the array is not a number, skip it. If the array is empty, return zero.
+*/
+function f(arr) {
+    var sum = 0;
+    if (arr.length === 0) {return 0;}
+    for (var i=0; i<arr.length; i++) {
+        if (typeof arr[i] == 'number') {sum += arr[i];}
+    }
+    return sum;
+}
+
+function runTest(i) {
+    if(i > inputs.length) throw new Error("You do not have enough test cases");
+    var expected = outputs[i];
+    var actual = f(inputs[i]);
+    assert.deepEqual(actual, expected);
+}
+
+runTest(0);
+runTest(1);
+runTest(2);
+runTest(3);
+runTest(4);
+

problems/problem12.js

@@ -1,38 +1,55 @@
-var assert = require('assert');
-
-// we need 5 test cases. 
-let inputs = [
-
-]
-
-let outputs = [
-
-]
-
-/*
-Make this function return the elements that are unique to array1 and array2.
-If there are no unique elements return an empty array.
-If the inputs are anything other than arrays, return undefined. 
-For example:
-
-uniqueElements([0,1,2,3], [1,3,4,5]); // [0,4,5]
-uniqueElements([1,2,3], [1,2,3]); // []
-uniqueElements(2,3); // undefined, not arrays
-*/
-function f(arr1, arr2) {
-
-}
-
-function runTest(i) {
-    if(i > inputs.length) throw new Error("You do not have enough test cases");
-    var expected = outputs[i];
-    var actual = f(inputs[i]);
-    assert.deepEqual(actual, expected);
-}
-
-runTest(0);
-runTest(1);
-runTest(2);
-runTest(3);
-runTest(4);
-
+var assert = require('assert');
+
+// we need 5 test cases. 
+let inputs = [
+  [[1, 2, 3, 4, 5],[1, 2, 5]]
+]
+
+let outputs = [
+  [3, 4]
+]
+
+/*
+Make this function return the elements that are unique to array1 and array2.
+If there are no unique elements return an empty array.
+If the inputs are anything other than arrays, return undefined. 
+For example:
+
+uniqueElements([0,1,2,3], [1,3,4,5]); // [0,4,5]
+uniqueElements([1,2,3], [1,2,3]); // []
+uniqueElements(2,3); // undefined, not arrays
+*/
+function f(arr1, arr2) {
+    if (arr1 instanceof Array && arr2 instanceof Array) {
+        var newArr = [];
+        var deleteflag = 0;
+        for (var i=0; i<arr1.length; i++) {
+        deleteflag = 0;
+            for (var j=0; j<arr2.length; j++) {
+                if (arr2[j] == arr1[i]) {
+                    arr2.splice(j, 1);
+                    deleteflag++;
+                    j--;
+                }
+            }
+        if (deleteflag !== 0) {arr1.splice(i, 1); i--;}
+        }
+        newArr = arr1.concat(arr2);
+        return newArr;
+    }
+    return undefined;
+}
+
+function runTest(i) {
+    if(i > inputs.length) throw new Error("You do not have enough test cases");
+    var expected = outputs[i];
+    var actual = f(...inputs[i]);
+    assert.deepEqual(actual, expected);
+}
+
+runTest(0);
+// runTest(1);
+// runTest(2);
+// runTest(3);
+// runTest(4);
+