Add integer.addBit, integer.removeBit and improve integer.setBit, integer.toggleBit, integer.getBit

[aandrejevas]

Hello, integer.addBit and integer.removeBit methods should be added to the library.

An implementation could look like this:

• add-bit.ts

export default (int32: number, position: number): number => int32 | (1 << position)

• remove-bit.ts

export default (int32: number, position: number): number => int32 & ~(1 << position)

Also integer.setBit, integer.toggleBit and integer.getBit functions could be improved:

• set-bit.ts

// Current.
export default (int32: number, position: number, value: Bit): Bit =>
	<Bit>(value === 1 ? int32 | (1 << position) : int32 & ~(1 << position))

// Proposed. The return type should be number, not Bit.
export default (int32: number, position: number, value: Bit): number =>
	(value === 1 ? int32 | (1 << position) : int32 & ~(1 << position))

// Proposed. Would be nice if we could pass a boolean to setBit.
export default (int32: number, position: number, value: Bit | boolean): number =>
	(!!value ? int32 | (1 << position) : int32 & ~(1 << position))

• toggle-bit.ts

// Current.
export default (int32: number, position: number) => int32 ^ (1 << position)

// Proposed. The return type should be specified.
export default (int32: number, position: number): number => int32 ^ (1 << position)

• get-bit.ts

// Current.
export default (int32: number, position: number): Bit =>
	<Bit>((int32 >> position) & 1)

// Proposed. Unsigned right shift should be used.
export default (int32: number, position: number): Bit =>
	<Bit>((int32 >>> position) & 1)