Submitting JS Building Homework - Lily

index.js

@@ -1,6 +1,10 @@
 var myEach = require('./myEach');
-var myMap = require('./myEach');
-var myReduce = require('./myEach');
+var myMap = require('./myMap');
+var myReduce = require('./myReduce');
+var myFilter = require('./myFilter');
+var mySome = require('./mySome');
+var myEvery = require('./myEvery');
+
 /* *********************************************************************
   You can edit this file
   It will make use of your code in myEach.js, myMap.js and myReduce.js
@@ -12,22 +16,75 @@ var numArray = [0,1,10,100,1000];
 
 /* myEach */
 
+
+console.log('Testing myEach, output: ');
 //
-// myEach(numArray, function print(element, index, arr) {
-//   console.log('inside myEach', element, index, arr);
-// });
+myEach(numArray, function print(element) {
+  // console.log('inside myEach', element, index, arr);
+  console.log(element);	
+});
 
 
+/* myMap */
 
+var input = ["a","b","c"];
+var output = myMap(input, function capitalize(v){
+    return v.toUpperCase();
+});
+console.log('Testing myMap, output: ',output);
+console.log(output === ["A", "B", "C"]) // assertion
 
-/* myMap */
 
-// var input = ["a","b","c"];
-// var output = myMap(input, function capitalize(v){
-//     return v.toUpperCase();
-// });
-// console.log('Testing myMap')
-// console.log(output === ["A", "B", "C"]) // assertion
+/* myReduce */
+
+var reduceInput = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+var stringInput = ["hi","hello","boo"];
+var reduceOutput = myReduce(stringInput, function add(previous, current) {
+  return previous + current;
+});
+console.log('Testing myReduce, output: ',reduceOutput);
+
+/* myFilter */
+
+var fruits = ["Apple", "Banana", "Cherry", "Durian", "Elderberry",
+"Fig", "Guava", "Huckleberry", "Ice plant", "Jackfruit"];
+
+var vowels = ["A", "E", "I", "O", "U"];
+function vowelFruit(fruitCollection) {
+  var result = vowels.indexOf(fruitCollection[0]) >= 0; // indexOf returns -1 if not found
+  //console.log("result for " + fruitCollection + " is " + result);
+  return result;
+}
 
+var vowelFruits = myFilter(fruits,vowelFruit);
+console.log("vowelFruits: ",vowelFruits);
+//=> ["Apple", "Elderberry", "Ice plant"]
+
+
+/* mySome */
+
+function isBiggerThan10(element, index, array) {
+  return element > 10;
+}
+
+console.log('Testing mySome:');
+console.log("False: ",mySome([2, 5, 8, 1, 4],isBiggerThan10));  // false
+console.log("True: ",mySome([12, 5, 8, 1, 4],isBiggerThan10)); // true
+console.log("False: ",mySome([4],isBiggerThan10)); // false
+console.log("False: ",mySome([10],isBiggerThan10)); // false
+console.log("True: ",mySome([11],isBiggerThan10)); // true
 
 console.log("the end");
+
+
+/* myEvery */
+
+function isBigEnough(element, index, array) {
+  return element >= 10;
+}
+
+console.log('Testing myEvery:');
+console.log("False: ",myEvery([12, 5, 8, 130, 44],isBigEnough));   // false
+console.log("True: ",myEvery([12, 54, 18, 130, 44],isBigEnough)); // true
+console.log("False: ",myEvery([5],isBigEnough));   // false
+console.log("True: ",myEvery([44],isBigEnough));   // true

myEach.js

@@ -1,9 +1,9 @@
 // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/ForEach
 
 function myEach(arr, callback) {
-
-//  CODE INSIDE HERE   //
-
+	for(var i=0;i<arr.length;i++) {
+		callback(arr[i],i,arr)
+	}
 }
 
 /*

myEvery.js

@@ -0,0 +1,14 @@
+
+
+function myEvery(arr, callback) {
+	var result = [];
+    for (var i = 0; i < arr.length; i++) {
+        if (!callback(arr[i], result, i, arr)) {
+          return false;
+        }
+    } 
+    return true;
+}
+
+
+module.exports = myEvery;

myFilter.js

@@ -0,0 +1,15 @@
+
+function myFilter(arr, callback) {
+	var result = [];
+    for (var i = 0; i < arr.length; i++) {
+        var value = arr[i];
+        if (callback(arr[i], value, i, arr)) {
+          result.push(value);
+        }
+    }
+   return result;   
+}
+
+
+
+module.exports = myFilter;

myMap.js

@@ -1,9 +1,11 @@
 // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Map
 
 function myMap(arr, callback) {
-
-//  CODE INSIDE HERE   //
-
+	var newArr=[];
+	for(var i=0;i<arr.length;i++) {
+		newArr[i]=callback(arr[i],i,arr);
+	}
+	return newArr;
 }
 
 /*

myReduce.js

@@ -1,10 +1,30 @@
 // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce for more details
 // Don't worry about initialValue at first. You can always add it in later.
 
-function myReduce(arr, callback) {
-
-//  CODE INSIDE HERE   //
-
+function myReduce(arr, callback, initialValue) {
+	if(!initialValue){
+		var output=arr[0];
+		if(arr.length>1){
+			for(var i=1;i<arr.length;i++) {
+				output=callback(output,arr[i],i,arr);
+			}
+		}
+		else {
+			return arr[0];	
+		}
+	}
+	else {
+		var output=initialValue;
+		if(arr.length>1){
+			for(var i=0;i<arr.length;i++) {
+				output=callback(output,arr[i],i,arr);
+			}
+		}
+		else {
+			return initialValue;	
+		}
+	}
+	return output;
 }
 
 /*

mySome.js

@@ -0,0 +1,14 @@
+
+
+function mySome(arr, callback) {
+	var result = [];
+    for (var i = 0; i < arr.length; i++) {
+        if (callback(arr[i], result, i, arr)) {
+          return true;
+        }
+    } 
+    return false;
+}
+
+
+module.exports = mySome;