js lec 1 added

lectures/lec5/p2/task1.js

@@ -0,0 +1,4 @@
+function sumNumbers(str){
+    str=str.split(" ");
+    return str.filter(substr => !isNaN(parseFloat(substr)) && isFinite(Number(substr))).reduce((acc,num) => acc+num,0);
+}

lectures/lec5/p2/task2.js

@@ -0,0 +1,3 @@
+function extractText(html){
+    return html.split("<p>").filter(substr => substr.includes("</p>")).map(substr = substr.split("</p>")[0]);
+}

lectures/lec5/p2/task3.js

@@ -0,0 +1,8 @@
+let arr = [12, 17, 12, 67, 23, 67, 8, 8, 9, 12, 8];
+
+let newArr = arr.filter(function (item, index) {
+    return arr.indexOf(item) === index;
+});
+
+alert(newArr);
+//12,17,67,23,8,9

lectures/lec5/p2/task4.js

@@ -0,0 +1,8 @@
+function sortNumbers(str){
+    str=str.split(" ");
+    return str.filter(substr => !isNaN(parseFloat(substr)) && isFinite(Number(substr))).map(Number).sort((a,b) => {return Number(a)-Number(b)});
+}
+
+alert(sortNumbers(" 12 234 67 aboba 123 123 83 27 6"))
+
+