AppBrewery - BMI

Question 1

theme

Answer 1

define a color palette

Question 2

cookbook

Answer 2

https://flutter.dev/docs/cookbook for task examples

Question 3

primary color

Answer 3

The background color for major parts of the app (toolbars, tab bars, etc)

Question 4

accent color

Answer 4

The foreground color for widgets (knobs, text, overscroll edge effect, etc).

Question 5

Color constructor

Answer 5

typical hexcode, ARGB, …

Question 6

color for text in them

Answer 6

textTheme

Question 7

how to change theme for local widget

Answer 7

wrap widget in Theme widget

Question 8

ThemeData.dark().copyWith(…)

Answer 8

create a copy of this theme, but edit inner parameters

Question 9

color of container is shorthand for setting

Answer 9

color of box decoration of container

Question 10

DRY

Answer 10

Don’t Repeat Yourself

Question 11

how to make a parameter required

Answer 11

add @required before parameter;
class ExampleClass {
bool isBool;
ExampleClass({@required this.isBool});

Question 12

immutability

Answer 12

cannot be changed

Question 13

a stless widget is mutable or immutable?

Answer 13

immutable

Question 14

const v final

Answer 14

const figured out at compile time; final set only once
final could be set to final string currentTime = DateTime.now();
const could not

Question 15

Dart class initializer order

Answer 15

1. init list 2. constructor

Question 16

initializer list

Answer 16

init properties (including final ones) before initialization

Question 17

flatbutton vs inkwell vs gesturerecognizer

Answer 17

flatbutton stylized + opinionated
inkwell has onPressed and visual feedback (ink splash)
gesturerecognizer no visual feedback nor style, many gestures

Question 18

function type

Answer 18

so even functions are objects and have a type, Function.

Question 19

void in Dart

Answer 19

denotes absence; return type of a function; can be anything but can’t be used for anything

Question 20

void onTapMale() {
    // ...
  }
means what?

Answer 20

onTapMale is a function (of type Function) which returns nothing (void)

Question 21

enum syntax

Answer 21

enum EnumName { ta, tb, tc, …}

EnumName.ta

Question 22

syntactic equivalent of 
void myFunc () {}

Answer 22

Function myFunc = (){}

Question 23

constants prefix

Answer 23

k

Question 24

constants dropdown

Answer 24

k …

Question 25

add a theme to a particular widget

Answer 25

wrap that widget in a theme of its type

Question 26

.of(), .copyWith()

Answer 26

make this one of a context, then copy it with certain overriding changes