Primitive Data Types: Jbyte #34
Description
Implement the byte primitive data type that allow to overcome the differences between Java and JavaScript.
The byte data type is an 8-bit signed two's complement integer. It has a minimum value of -128 and a maximum value of 127 (inclusive).
Expected Behavior
- Declaring a variable to refer to a byte
- Creating, Initializing, and Accessing a byte
- initialize with hexadecimal
- initialize with binary
- Equality and Relational Operators
- equal to
- not equal to
- greater than
- greater than or equal to
- less than
- less than or equal to
- Arithmetic Operators
- additive operator
- subtraction operator
- multiplication operator
- division operator
- remainder operator
- Unary Operators
- unary plus operator
- unary minus operator
- increment operator
- decrement operator
- Exception
- incompatible types: possible lossy conversion with short, int, long, float o double
- incompatible types: cannot be converted to byte
Acceptance test
Declaring a variable to refer to a byte
let aByte: Jbyte;Creating, Initializing, and Accessing a byte
const aByte = jbyte('26');
console.log("Byte: " + aByte);
// initialize with hexadecimal
const anHex = jbyte('0x1a');
console.log("Hex: " + anHex);
// initialize with binary
const aBin = jbyte('0b11010');
console.log("Bin: " + aBin);Output:
Byte: 26
Hex: 26
Bin: 26
Equality and Relational Operators
const value1 = jbyte('1');
const value2 = jbyte('2');
if(is(value1.eq(value2)))
console.log("value1 == value2");
if(is(value1.ne(value2)))
console.log("value1 != value2");
if(is(value1.gt(value2)))
console.log("value1 > value2");
if(is(value1.ge(value2)))
console.log("value1 > value2");
if(is(value1.lt(value2)))
console.log("value1 < value2");
if(is(value1.le(value2)))
console.log("value1 <= value2");Output:
value1 != value2
value1 < value2
value1 <= value2
Arithmetic Operators
const value8 = jbyte('8');
const value7 = jbyte('7');
let result: Jbyte;
result = value8.add(value7);
console.log("8 + 7 = " + result);
result = value8.sub(value7);
console.log("8 - 7 = " + result);
result = value8.mul(value7);
console.log("8 * 7 = " + result);
result = value8.div(value7);
console.log("8 / 7 = " + result);
result = value8.mod(value7);
console.log("8 % 7 = " + result);Output:
8 + 7 = 15
8 - 7 = 1
8 * 7 = 56
8 / 7 = 1
8 % 7 = 1
Unary Operators
const value1 = jbyte('-1');
let result: Jbyte;
result = value1.plus();
console.log("+(-1) = " + result);
value1.inc();
console.log("++(-1) = " + value1);
value1.dec();
console.log("--(0) = " + value1);
result = value1.minus();
console.log("-(-1) = " + result);Output:
+(-1) = -1
++(-1) = 0
--(0) = -1
-(-1) = 1
Exceptions
const aByte = jbyte('129');
const anotherByte = jbyte('ten');Output:
ERROR: incompatible types: possible lossy conversion from int to byte
ERROR: incompatible types: String cannot be converted to byte