homework №3

NatashaYakovleva/f1.js

@@ -0,0 +1,17 @@
+function splitAndMerge (str, sp) {
+
+  var res = [];
+
+  var arr = str.split(' ').forEach(function(elem){
+
+    res += elem.split('').join(sp) + " ";
+  })
+
+  return res.trim();
+
+}
+
+// var str = "Ice-cream is very tasty!";
+// var sp = '_';
+
+// console.log(splitAndMerge(str, sp));

NatashaYakovleva/f10.js

@@ -0,0 +1,18 @@
+Function.prototype.myBind = function (context){
+
+	const func = this;
+
+	return function() {
+
+	  var arr = [].slice.call(arguments);
+
+		return func.apply(context, arr);
+	}
+
+}
+
+function addPropToNumber(number) { return this.prop + number; }
+
+var bound = addPropToNumber.myBind({ prop: 9 });
+console.log(bound(5)); 
+

NatashaYakovleva/f2.js

@@ -0,0 +1,21 @@
+function convert (obj) {
+
+  var res = [];
+
+  for (let item in obj){
+
+    var crtArr = [];
+    crtArr.push(item);
+    crtArr.push(obj[item]);
+    res.push(crtArr);
+}
+  return res;
+}
+
+var obj = {
+  name: "Ivan",
+  age: 5,
+  homeTown: "Volgograd"
+};
+
+// console.log(convert(obj));

NatashaYakovleva/f3.js

@@ -0,0 +1,21 @@
+function convertToCamelCasing (str) {
+
+  const STARTING_POSITION = 0;
+  const FIRST_POSITION = 1;
+
+  var res = str.split(/[_\-]/g);
+
+  for(let i=1; i<res.length; ++i){
+
+    res[i] = res[i].charAt(STARTING_POSITION).toUpperCase() + res[i].substr(FIRST_POSITION);
+
+  }
+
+  return res.join("");
+
+}
+
+// var str = "La-lolo_ka";
+// var str = "la-lolo_ka";
+
+// console.log(convertToCamelCasing(str));

NatashaYakovleva/f4.js

@@ -0,0 +1,19 @@
+function reverseWords (str) {
+
+  var res = [];
+
+  var arr = str.split(" ").forEach(function (elem){
+
+      res += elem.split('').reverse().join("") + " ";
+  });
+
+  return res.trim();
+
+}
+
+// var str = "Ice-cream is very tasty!";
+
+// console.log(reverseWords(str));
+
+
+

NatashaYakovleva/f5.js

@@ -0,0 +1,40 @@
+function stringExpansion(str){
+
+  const DOES_NOT_MATCH = -1;
+
+  if (str === "")
+    return str;
+  else {
+
+    var crtArr = str.split('');
+    var res = [];
+
+    for (let i=0; i<crtArr.length; ++i){
+
+      if (crtArr[i].search(/[a-zA-Z]/) != DOES_NOT_MATCH){
+        res.push(crtArr[i]);
+      }
+
+      else if (crtArr[i].search(/[0-9]/) != DOES_NOT_MATCH) {
+
+        if (i+1 == crtArr.length)
+          break;
+
+        if (crtArr[i+1].search(/[0-9]/) != DOES_NOT_MATCH)
+          continue;
+
+        if (crtArr[i+1].search(/[a-zA-Z]/) != DOES_NOT_MATCH) {
+
+          for (let k=0; k<crtArr[i]; ++k)
+            res.push(crtArr[i+1]);
+          i++;
+        }
+      }
+    }
+    return res.join('');
+  }
+}
+
+// var str = "r1s2T3r0i52J4";
+// console.log(stringExpansion(str));
+

NatashaYakovleva/f6.js

@@ -0,0 +1,29 @@
+//min value
+function findMinNumb () {
+
+  var min = Number.MAX_VALUE;
+
+  for (let i=0; i<arguments.length; ++i){
+
+    min = arguments[i] < min ? arguments[i] : min;  
+  }
+  return min;
+}
+
+//max value
+function findMaxNumb () {
+
+  var max = Number.MIN_VALUE;
+
+  for (let i=0; i<arguments.length; ++i){
+
+    max = arguments[i] > max ? arguments[i] : max;  
+  }
+
+  return max;
+}
+
+// console.log("Min: " + findMinNumb(1, 2, 4, 3, -1, 0));
+
+// console.log("Max: " + findMaxNumb(1, 2, 4, 3, -1, 0));
+

NatashaYakovleva/f7.js

@@ -0,0 +1,18 @@
+function transform(arr) {
+
+  var newArr = [];
+
+  for (let i=0; i<arr.length; ++i){
+
+    newArr.push(function() {console.log(arr[i])});
+  }
+
+  return newArr;
+}
+
+// var arr = [1, 2, 3, 4, 5];
+// var newArr = transform(arr);
+
+// for (let i=0; i< newArr.length; ++i){
+//   newArr[i] ();
+// }

NatashaYakovleva/f8.js

@@ -0,0 +1,27 @@
+function sumOfNumbs () {
+
+  var arr = [];
+
+  for (let i=0; i<arguments.length; ++i)
+    arr.push(arguments[i]);
+
+  return sum(arr, 0);
+
+}
+
+
+function sum(arr, i){
+
+  var iteration = i;
+  res = 0;
+
+  if (iteration != arr.length){
+
+    res = arr[iteration] + sum(arr, ++iteration);
+  }
+
+  return res;
+
+}
+
+// console.log(sumOfNumbs(-1, 2, 1, 10, 5));

NatashaYakovleva/f9.js

@@ -0,0 +1,13 @@
+function countDown(numb){
+
+  if (numb >= 0){
+    console.log(numb);
+    setInterval(countDown(--numb), 1);
+  }
+
+  // return;
+
+}
+
+var numb = 7;
+countDown(numb);