กำหนดค่าเวอร์ชัน FVM พร้อมโปรเจ็กต์เพื่อความสอดคล้องกันระหว่างทีมและสภาพแวดล้อม CI
ตั้งค่าเวอร์ชัน flutter sdk global ในโปรเจ็กต์ต่างๆ
ติดตั้ง FVM
ติดตั้งผ่าน pub (package manager for the Dart programming language)
$ pub global activate fvm
*** Window OS ให้ทำการ set environment PATH \Users\poolsawat\AppData\Local\Pub\Cache\bin เพื่อให้สามารถเรียก fvm cli แบบ global ได้
fvm help เช็ค options ต่างๆ
$ fvm help
Flutter Version Management: A cli to manage Flutter SDK versions.
Usage: fvm <command> [arguments]
Global options:
-h, --help Print this usage information.
--verbose Print verbose output.
Available commands:
config Set configuration for FVM
flutter Proxies Flutter Commands
install Installs Flutter SDK Version
list Lists installed Flutter SDK Version
releases Lists Flutter SDK releases.
remove Removes Flutter SDK Version
use Which Flutter SDK Version you would like to use
version Prints the currently-installed version of FVM
Run "fvm help <command>" for more information about a command.
fvm list แสดงเวอร์ชัน flutter sdk ทั้งหมด
PS C:\WINDOWS\system32> fvm list
Versions path: \Users\poolsawat\fvm\versions
2.0.1
1.22.6
console.log(3 > 2) // true, because 3 is greater than 2
console.log(3 >= 2) // true, because 3 is greater than 2
console.log(3 < 2) // false, because 3 is greater than 2
console.log(2 < 3) // true, because 2 is less than 3
console.log(2 <= 3) // true, because 2 is less than 3
console.log(3 == 2) // false, because 3 is not equal to 2
console.log(3 != 2) // true, because 3 is not equal to 2
console.log(3 == '3') // true, compare only value
console.log(3 === '3') // false, compare both value and data type
console.log(3 !== '3') // true, compare both value and data type
console.log(3 != 3) // false, compare only value
console.log(3 !== 3) // false, compare both value and data type
console.log(0 == false) // true, equivalent
console.log(0 === false) // false, not exactly the same
console.log(0 == '') // true, equivalent
console.log(0 == ' ') // true, equivalent
console.log(0 === '') // false, not exactly the same
console.log(1 == true) // true, equivalent
console.log(1 === true) // false, not exactly the same
console.log(undefined == null) // true
console.log(undefined === null) // false
console.log(NaN == NaN) // false, not equal
console.log(NaN === NaN) // false
console.log(typeof NaN) // number
let isRaining = true
isRaining
? console.log('You need a rain coat.')
: console.log('No need for a rain coat.')
isRaining = false
isRaining
? console.log('You need a rain coat.')
: console.log('No need for a rain coat.')
const now = new Date()
console.log(now) // Sat Jan 04 2020 00:56:41 GMT+0200 (Eastern European Standard Time)
// ดึงปี
const now = new Date()
console.log(now.getFullYear()) // 2020
// ดึงเดือน
const now = new Date()
console.log(now.getMonth()) // 0, because the month is January, month(0-11)
// ดึงวันที่
const now = new Date()
console.log(now.getDate()) // 4, because the day of the month is 4th, day(1-31)
รูปแบบ Date อื่น ๆ
const now = new Date()
const year = now.getFullYear() // return year
const month = now.getMonth() + 1 // return month(0 - 11)
const date = now.getDate() // return date (1 - 31)
const hours = now.getHours() // return number (0 - 23)
const minutes = now.getMinutes() // return number (0 -59)
console.log(`${date}/${month}/${year} ${hours}:${minutes}`) // 4/1/2020 0:56
สั่งรันโค๊ดตัวอย่างที่ flutter มีให้ด้วยคำสั่ง “flutter run” หรือสั่ง run ผ่านไฟล์ lib/main.dart ด้วยปุ่ม Run
Flutter run key commands. r Hot reload. R Hot restart. h Repeat this help message. d Detach (terminate “flutter run” but leave application running). c Clear the screen q Quit (terminate the application on the device). An Observatory debugger and profiler on sdk gphone x86 arm is available at: http://127.0.0.1:53236/Vgi_F0zG2PU=/
