### インターフェイス
interface Human {
name:string
print():void
}
class Person implements Human {
name:string = 'no-name'
mail:string
age:number
constructor(name:string, mail:string = 'no-mail', age:number = -1){
this.name = name
this.mail = mail
this.age = age
}
print():void {
console.log(this.name + '(' + this.mail + ',' + this.age + ')')
}
}
class Student implements Human {
name:string = 'no-name'
school?:School
grade?:number
constructor(name:string,school?:School, grade?:number){
this.name = name
this.school = school
this.grade = grade
}
print():void {
let gd:string = this.grade ? String(this.grade) : '-'
console.log(this.name + '(' + this.school + ' school: ' + gd + ' grade)')
}
}
const taro:Person = new Person('taro', 'taro@yamada', 39)
const hanako:Student = new Student('hanako', School.high, 39)
const sachiko:Person = new Person('sachiko')
const jiro:Student = new Student('jiro')
const data:Human[] = [taro, hanako, sachiko, jiro]
for(let item of data){
item.print()
}
### インターフェイスの継承
interface People extends Human {
birth:Date
}
class Employee implements People {
name:string = 'no-name'
company:string = ''
birth:Date = new Date()
constructor(nm:string, cm:string, bth:Date){
this.name = nm
this.company = cm
this.birth = bth
}
print():void {
console.log(this.name + ' [' + this.company + ']')
}
}
const ichiro = new Employee('ichiro',
'Baseball Inc.', new Date('1982/10/10'))
ichiro.print()
### 静的メンバー
class StaticHuman {
static fullname:string
static age:number
static set(nm:string, ag:number):void {
this.fullname = nm
this.age = ag
}
static print():void {
console.log(this.fullname + '(' + this.age + ')')
}
}
StaticHuman.set('taro',39)
StaticHuman.print()
StaticHuman.set('hanako',29)
StaticHuman.print()
### パラメータープロパティ
class Human {
constructor(readonly name:string, readonly age:number){
}
print():void {
console.log(this.name + '(' + this.age + ')')
}
}
const taro = new Human('taro', 39)
taro.print()
const hana = new Human('hanako', 28)
hana.print()
### 総称型
class Data<T> {
data?:T[]
constructor(...item:T[]){
this.data = item
}
print():void {
if(this.data) {
for(let item of this.data){
console.log(item)
}
} else {
console.log('no data...')
}
}
}
const data1 = new Data<string>('one','two','three')
const data2 = new Data<number>(123,456,78,90)
data1.print()
data2.print()
### ユーティリティ型
Readonly
type Human = {
name:string
mail?:string
age?:number
}
class Person {
human:Required<Human>
constructor(nm:string, ml:string, ag:number){
this.human = {name:nm, mail:ml, age:ag}
}
print():void {
console.log(this.human.name
+ ' (' + this.human.age + '::'
+ this.human.mail + ')')
}
}
const taro = new Person('taro', 'taro@yamada', 39)
taro.print()
OK
