Index: typescript/src/index.ts
===================================================================
diff -u -rffd4c02b8351cba5d3d9638ad94d86f12111e50b -r4cbdd61772033f3c4fabfebc8fb3f10bd55e7ba1
--- typescript/src/index.ts	(.../index.ts)	(revision ffd4c02b8351cba5d3d9638ad94d86f12111e50b)
+++ typescript/src/index.ts	(.../index.ts)	(revision 4cbdd61772033f3c4fabfebc8fb3f10bd55e7ba1)
@@ -45,19 +45,78 @@
 //     return name;
 // }
 
-console.log(printME("test","test2"));
+// console.log(printME("test","test2"));
 
 let array = new Array;
 array.push(1);
 array.push(resultCar);
 array.push('3');
 
-console.log(array);
+// console.log(array);
 
 let numbers = [1,2,3];
 let strings = ['Hello','World'];
-console.log(numbers, strings);
+// console.log(numbers, strings);
 
 let a = [1,2,3];
 let o = {name: 'Jack', age: 32};
-console.log(Array.isArray(a), Array.isArray(o));
\ No newline at end of file
+// console.log(Array.isArray(a), Array.isArray(o));
+
+let numArray: number[] = [1,2,3];
+let strArray: string[] = ['Hello','World'];
+
+type IPerson = {name: string, age?: number};
+let personArray:IPerson[] = [{name: 'Jack'}, {name:'Jane', age:32}];
+
+
+const split = (str:string, delim:string=''): string[] => str.split(delim);
+console.log(split('hello'));
+console.log(split('w_o_r_l_d','_'));
+
+const join = (strArray:string[], delim:string=''):string => strArray.join(delim);
+
+console.log(join(['h','e','l','l','o']));
+console.log(join(['w','o','r','l','d'],'_'));
+
+const nums: number[] = [1,2,3,4,5];
+for(let index=0; index < nums.length; index++){
+    const item: number = nums[index];
+    console.log(item);
+}
+
+let arr:number[] = [1,2,3,4,5];
+let [first, second, third, ...rest] = arr; // 비구조화
+console.log(first,second,third, rest);
+
+//구조화
+let names = ['Jack', 'Jane', 'Steve'];
+
+for(let index in names){
+    const name = names[index];
+    console.log(`[${index}] : ${name}`);
+}
+
+let jack:{[key:string]: string | number} = {name : 'Jack', age: 32};
+// let jack = {name : 'Jack', age: 32};
+for(let property in jack){
+    console.log(`${property} : ${jack[property]}`);
+}
+
+for(let name of ['Jack', 'Jane', 'Steve']) { // object 일때 주로 사용
+    console.log(name);
+}
+
+// const arrayLength = (array:T[]):number => array.length;
+const arrayLength = <T>(array:T[]):number => array.length;
+const isEmpty = <T>(array:T[]):boolean => arrayLength<T>(array) == 0;
+
+let numArr: number[] = [1,2,3];
+let strArr: string[] = ['Hello','World'];
+
+let personArr: IPerson[] = [{name: 'Jack'}, {name : 'Jane', age: 32}];
+console.log(arrayLength(numArr),
+            arrayLength(strArr),
+            arrayLength(personArr),
+            isEmpty([]),
+            isEmpty([1])
+);