JS Function Lib Proj

index.js

@@ -0,0 +1,169 @@
+function myEach(collection, callback) {
+  const origColl = collection
+  if (typeof collection === 'object') {
+    collection = Object.values(collection)
+  }
+
+  for(let i = 0; i < collection.length; i++) {
+    callback(collection[i])
+  }
+
+  return origColl
+}
+
+function myMap(collection, callback) {
+  const newColl = []
+  if (typeof collection === "object") {
+    collection = Object.values(collection)
+  }
+
+  for(let i = 0; i < collection.length; i++) {
+    newColl.push(callback(collection[i]))
+  }
+
+  return newColl
+}
+
+function myReduce(collection, callback, accrual) {
+  if (typeof collection === "object") {
+    collection = Object.values(collection)
+  }
+
+  for(let i = 0; i < collection.length; i++) {
+    if(accrual != undefined){
+      accrual = callback(accrual, collection[i])
+    } else {
+      accrual = collection[i]
+    }
+  }
+
+  return accrual
+}
+
+function myFind(collection, predicate) {
+  if (typeof collection === "object") {
+    collection = Object.values(collection)
+  }
+
+  for(let i = 0; i < collection.length; i++) {
+    if(predicate(collection[i])) {
+      return collection[i]
+    }
+  }
+}
+
+function myFilter(collection, predicate) {
+  const newColl = []
+
+  if (typeof collection === "object") {
+    collection = Object.values(collection)
+  }
+
+  for(let i = 0; i < collection.length; i++) {
+    if(predicate(collection[i])) {
+      newColl.push(collection[i])
+    }
+  }
+
+  return newColl
+}
+
+function mySize(collection) {
+  let size = 0
+
+  if (typeof collection === "object") {
+    collection = Object.values(collection)
+  }
+
+  for(let i = 0; i < collection.length; i++) {
+    size++
+  }
+
+  return size
+}
+
+function myFirst(arr, count = 1) {
+  if (count === 1) {
+    return arr[0]
+  } else {
+    const newArr = []
+    for (let i = 0; i < count; i++) {
+      newArr.push(arr[i])
+    }
+    return newArr
+  }
+}
+
+function myLast(arr, count = 1) {
+  if (count === 1) {
+    return arr[arr.length-1]
+  } else {
+    const newArr = []
+    for (let i = arr.length - count; i < arr.length; i++) {
+      newArr.push(arr[i])
+    }
+    return newArr
+  }
+}
+
+function mySortBy(array, callback) {
+  const sortedArr = [array[0]]
+
+  for (let i = 1; i < array.length; i++) {
+    for (let j = 0; j < sortedArr.length; j++) {
+      if (callback(array[i]) <= callback(sortedArr[j])) {
+        sortedArr.splice(j, 0, array[i])
+        break
+      } else if (j === sortedArr.length - 1) {
+        sortedArr.push(array[i])
+        break
+      }
+    }
+  }
+  return sortedArr
+}
+
+function myFlatten(array, bleh, flattenedArr = []) {
+  if (bleh === true) {
+    for (let i = 0; i < array.length; i++) {
+      if (typeof array[i] === "object") {
+        for (let j = 0; j < array[i].length; j++) {
+          flattenedArr.push(array[i][j])
+        }
+      } else {
+        flattenedArr.push(array[i])
+      }
+    }
+    return flattenedArr
+  } else {
+    for (let i = 0; i < array.length; i++) {
+      if (typeof array[i] === "object") {
+        myFlatten(array[i], false, flattenedArr)
+      } else {
+        flattenedArr.push(array[i])
+      }
+    }
+
+    return flattenedArr
+  }
+}
+
+function myKeys(obj) {
+  const keyArr = []
+
+  for(const key in obj) {
+    keyArr.push(key)
+  }
+
+  return keyArr
+}
+
+function myValues(obj) {
+  const valueArr = []
+
+  for(const key in obj) {
+    valueArr.push(obj[key])
+  }
+
+  return valueArr
+}