basic 13 completed

basic13.js

@@ -0,0 +1,182 @@
+function print1To255(){
+  for(var i = 1; i <= 255; i++){
+    console.log(i)
+  }
+}
+
+print1To255();
+
+function printIntsAndSum0To255(){
+  var sum = 0;
+  for(var i = 0; i <= 255; i++){
+     sum += i;
+    console.log(sum);
+  }
+}
+
+printIntsAndSum0To255();
+
+function printOddsTo255(){
+  for(var i = 1; i <= 255; i++){
+     if(i % 2 !== 0){
+    console.log(i);
+    }
+  }
+}
+
+printOddsTo255();
+
+
+function printArrayVals(arr){
+  for (var i=0; i < arr.length; i++){
+    console.log(arr[i]);
+  }
+}
+
+var newArray = [1,2,3,4];
+
+printArrayVals(newArray);
+
+
+
+function printMaxOfArray(arr){
+  var counter = arr[0];
+  for (var i=0; i < arr.length; i++){
+    if (arr[i] > counter){
+      counter = arr[i];
+    }
+  }
+  console.log(counter)
+}
+
+var newArray = [-1,2,-3,-4];
+
+printMaxOfArray(newArray);
+
+
+function printAverageOfArray(arr){
+  var average = 0;
+  for (var i=0; i < arr.length; i++){
+    average += arr[i];
+    }
+
+  average = average/arr.length;
+  console.log(average);
+}
+
+var newArray = [1,2,-3,4];
+
+printAverageOfArray(newArray);
+
+function returnOddsTo255(){
+  var newArray = [];
+  for(var i = 1; i <= 255; i++){
+     if(i % 2 !== 0){
+    newArray.push(i)
+    }
+  }
+  return newArray;
+}
+
+returnOddsTo255();
+
+function squareArrayVals(arr){
+  var newArray = [];
+  for(var i = 0; i < arr.length; i++){
+     newArray.push(arr[i]*arr[i]);
+    }
+  arr = newArray;
+  return arr;
+}
+
+var squared = [2,4,6,8]
+
+squareArrayVals(squared);
+
+
+function returnArrayCountGreaterThanY(arr, y){
+  var counter = 0;
+  var newArray = [];
+  for(var i = 0; i < arr.length; i++){
+    if(arr[i] > y){
+      newArray.push(arr[i]);
+      counter++;
+    }
+  }
+  console.log('Array had ' + counter + ' values greater than ' + y + '. Here are the values: '+ newArray);
+}
+
+ var compareArray = [1,2,3,6,7,8];
+
+ var compareVal = 5;
+
+ returnArrayCountGreaterThanY(compareArray, compareVal)
+
+
+ function zeroOutArrayNegativeVals(arr){
+  var zero = 0;
+  for(var i = 0; i < arr.length; i++){
+    if(arr[i] < 0){
+      arr[i] = zero;
+    }
+  }
+  return arr;
+}
+
+
+zeroOutArrayNegativeVals([1,2,-3,4,-5])
+
+
+function printMaxMinAverageArrayVals(arr){
+  var average = 0;
+  var min = arr[0];
+  var max = arr[0];
+  for (var i = 0; i < arr.length; i++){
+    if (arr[i] < min){
+      min = arr[i];
+    }
+    if (arr[i] > max) {
+      max = arr[i];
+    }
+    average += arr[i];
+  }
+  average = average/arr.length;
+  console.log(min)
+  console.log(max)
+  console.log(average)
+
+}
+
+
+printMaxMinAverageArrayVals([1,2,3,4,0])
+
+
+function shiftArrayValsLeft(arr){
+  var length = arr.length - 1;
+  var end = 0;
+  for(var i = 1; i < arr.length; i++){
+    arr[i-1] = arr[i];
+  }
+  arr[length] = end;
+  return arr;
+}
+
+shiftArrayValsLeft([1,2,3,4,5])
+
+
+function swapStringForArrayNegativeVals(arr){
+  var newArr = [];
+  for(var i = 0; i < arr.length; i++){
+    if(arr[i] < 0){
+      newArr.push('Dojo');
+    } else{
+      newArr.push(arr[i]);
+    }
+  }
+    return newArr;
+  }
+
+
+
+swapStringForArrayNegativeVals([1,-3,4,-5,6])
+