5.4ArrayMethod/t.js

@@ -89,92 +89,13 @@ console.log(numbers.reduceRight((sum, cur) => sum + cur, 0));
 console.log(Array.isArray(countries))
 
 function camelize(str){
-    // words = str.split('-')
-    // for(let i = 1; i < words.length; i++){
-    //     words[i] = words[i][0].toUpperCase() + words[i].slice(1);
-    // }
-    // return words.join('');
-    return str.split('-')
-    .map((word, index) => index == 0 ? word: word[0].toUpperCase() + word.slice(1))
-    .join('')
+    words = str.split('-')
+    for(let i = 1; i < words.length; i++){
+        words[i][0] = words[i][0].toUpperCase();
+        console.log(words[i])
+    }
+    return words.join('');
 }
 console.log(camelize("background-color"))
 console.log(camelize("list-style-image"))
-console.log(camelize("-webkit-translation"))
-
-function filterRange(arr, a, b){
-    return arr.filter(ele => ele >= a && ele <= b);
-}
-arr = [5, 3, 8, 1];
-let filtered = filterRange(arr, 1, 4);
-console.log(filtered)
-console.log(arr)
-
-
-function copySorted(arr){
-    return arr.slice().sort();
-}
-arr = ["HTML", "JavaScript", "CSS"];
-
-let sorted = copySorted(arr);
-console.log(sorted)
-console.log(arr)
-
-function Calculator(){
-    this.methods = {
-        "-": (a,b) => a-b,
-        "+": (a,b) => a+b
-    };
-    this.calculate = function(str){
-        let split = str.split(' ');
-        a = +split[0];
-        op = split[1];
-        b = +split[2];
-
-        if (!this.methods[op] || isNaN(a) || isNaN(b)){
-            return NaN;
-        }
-
-        return this.methods[op](a,b);
-    }
-    this.addMethod = function(name, func){
-        this.methods[name] = func;
-    }
-}
-let john = { name: "John", surname: "Smith", id: 25 };
-let pete = { name: "Pete", surname: "Hunt", id: 30 };
-let mary = { name: "Mary", surname: "Key", id: 28 };
-
-users = [ john, pete, mary ];
-
-names = users.map((user) => user.name)
-
-console.log( names ); // John, Pete, Mary
-
-let usersMapped = users.map((user) => {
-    return {
-        fullName: user.name + ' ' + user.surname, 
-        id: user.id
-    }
-}
-);
-console.log(usersMapped[0].id)
-console.log(usersMapped[0].fullName)
-
-function sortByAge(arr){
-    return arr.sort((userA, userB) => userA.id - userB.id)
-}
-
-
-sortByAge(users)
-console.log(users[0].name)
-console.log(users[1].name)
-console.log(users[2].name)
-
-function getAverageAge(arr){
-    return arr.reduce(function(sum, cur){
-        sum = sum + cur.id;
-    },0) / arr.length;
-}
-
-console.log(getAverageAge(users))
+console.log(camelize("-webkit-translation"))

5.5Iterables/t.js

@@ -53,6 +53,3 @@ console.log(arr_s);
 console.log(arr_s[0]);
 console.log(arr_s[1]);
 console.log(arr_s.length);
-
-
-

5.6Map/t.js

@@ -1,18 +0,0 @@
-let map = new Map();
-
-map.set('1', 'first');
-map.set(1, 'second');
-map.set(true, 'third');
-
-console.log(map.get('1'));
-console.log(map.get(1));
-console.log(map.get(true));
-
-console.log(map.size);
-
-// we should use the map.get() method, not map[] so that we can use the feature of the map, ot the map can only get the value from number and string
-
-let person = {name: 'John'};
-map.set(person, 'hi');
-console.log(map.get(person));
-