big-bit-mask
v2.0.4
Published
The infinite bitmask serializable into a base64-like, url-safe string.
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Big bit mask
When bits is not enough ...
This library implements a bitmask serializable into a base64-like, url-safe string.
Other platform compatibility
| Platform | Repository | Package | |-|-|-| | PHP | php-big-bit-mask | Packagist | | .NET | BigBitMask.NET | NuGet |
Install
> npm install big-bit-maskor
> yarn add big-bit-maskUsage
Module import
import { BigBitMask } from "big-bit-mask";Or require:
var BigBitMask = require("big-bit-mask").BigBitMask;Or simple script without anything else:
<html>
<head>
<script src="./node_modules/big-bit-mask/dist/big-bit-mask.es5.min.js"></script>
</head>
<body>
<script>
var BigBitMask = BIGBITMASK.BigBitMask;
</script>
</body>
</html>What next?
Now we can create new empty bitmask
var bitmask = new BigBitMask();or load it from string
var bitmask = new BigBitMask("CE3fG_gE-56");
//Let's see what inside now
var content = "";
for(var i = 0; i < 11 * 6; i++) { // Each character contains 6 bits, as in base64
content += bitmask.get(i) ? "1" : "0";
}
console.info(content);output: 010000001000111011111110011000111111000001001000011111100111010111
Then we can change some bits and get back our string representation
bitmask.set(65, false);
bitmask.set(64, false);
bitmask.set(63, false);
bitmask.set(61, false);
bitmask.set(19, false);
bitmask.set(5, true);
console.info(bitmask.toString());output: iE3dG_gE-5
But what if I want to have a named flags?
You can extend BigBitMask with your model:
class MyCoolCheckboxes extends BigBitMask {
static get CHECKBOX_0() { return 0; }
static get CHECKBOX_1() { return 1; }
static get CHECKBOX_2() { return 2; }
static get CHECKBOX_3() { return 3; }
static get CHECKBOX_4() { return 4; }
static get CHECKBOX_5() { return 5; }
static get CHECKBOX_6() { return 6; }
static get CHECKBOX_7() { return 7; }
static get CHECKBOX_8() { return 8; }
static get CHECKBOX_9() { return 9; }
get checkbox0() { return this.get(MyCoolCheckboxes.CHECKBOX_0); }
set checkbox0(value) { return this.set(MyCoolCheckboxes.CHECKBOX_0, value); }
get checkbox1() { return this.get(MyCoolCheckboxes.CHECKBOX_1); }
set checkbox1(value) { return this.set(MyCoolCheckboxes.CHECKBOX_1, value); }
get checkbox2() { return this.get(MyCoolCheckboxes.CHECKBOX_2); }
set checkbox2(value) { return this.set(MyCoolCheckboxes.CHECKBOX_2, value); }
get checkbox3() { return this.get(MyCoolCheckboxes.CHECKBOX_3); }
set checkbox3(value) { return this.set(MyCoolCheckboxes.CHECKBOX_3, value); }
get checkbox4() { return this.get(MyCoolCheckboxes.CHECKBOX_4); }
set checkbox4(value) { return this.set(MyCoolCheckboxes.CHECKBOX_4, value); }
get checkbox5() { return this.get(MyCoolCheckboxes.CHECKBOX_5); }
set checkbox5(value) { return this.set(MyCoolCheckboxes.CHECKBOX_5, value); }
get checkbox6() { return this.get(MyCoolCheckboxes.CHECKBOX_6); }
set checkbox6(value) { return this.set(MyCoolCheckboxes.CHECKBOX_6, value); }
get checkbox7() { return this.get(MyCoolCheckboxes.CHECKBOX_7); }
set checkbox7(value) { return this.set(MyCoolCheckboxes.CHECKBOX_7, value); }
get checkbox8() { return this.get(MyCoolCheckboxes.CHECKBOX_8); }
set checkbox8(value) { return this.set(MyCoolCheckboxes.CHECKBOX_8, value); }
get checkbox9() { return this.get(MyCoolCheckboxes.CHECKBOX_9); }
set checkbox9(value) { return this.set(MyCoolCheckboxes.CHECKBOX_9, value); }
}
var checkboxes = new MyCoolCheckboxes();
checkboxes.checkbox5 = true;
checkboxes.checkbox7 = true;
checkboxes.checkbox8 = true;
console.info(checkboxes.toString());output: gG
Or with TypeScript:
class MyCoolCheckboxes extends BigBitMask {
public static readonly CHECKBOX_0 = 0;
public static readonly CHECKBOX_1 = 1;
public static readonly CHECKBOX_2 = 2;
public get checkbox0(): boolean { return this.get(MyCoolCheckboxes.CHECKBOX_0); }
public set checkbox0(value: boolean) { this.set(MyCoolCheckboxes.CHECKBOX_0, value); }
public get checkbox1(): boolean { return this.get(MyCoolCheckboxes.CHECKBOX_1); }
public set checkbox1(value: boolean) { this.set(MyCoolCheckboxes.CHECKBOX_1, value); }
public get checkbox2(): boolean { return this.get(MyCoolCheckboxes.CHECKBOX_2); }
public set checkbox2(value: boolean) { this.set(MyCoolCheckboxes.CHECKBOX_2, value); }
}Useful properties and methods
isEmpty
Returns: boolean
Indicates that the BigBitMask instance has none of its flags set to true.
equals(otherMask)
Returns: boolean
Compares the current BigBitMask instance to another.
or(otherMask)
Returns: void
Assigns to the current instance the result of a bitwise OR operation between the current BigBitMask instance and another.
and(otherMask)
Returns: void
Assigns to the current instance the result of a bitwise AND operation between the current BigBitMask instance and another.
xor(otherMask)
Returns: void
Assigns to the current instance the result of a bitwise XOR operation between the current BigBitMask instance and another.
BigBitMask.EQUALS(maskA, maskB)
Returns: boolean
Compares two BigBitMask instances.
BigBitMask.OR(arg, ...)
Returns: new instance of BigBitMask
Applies a bitwise OR operation between BigBitMask instances and returns the result as a new BigBitMask instance. The arguments are expected to be BigBitMask instances or a single non-empty BigBitMask array.
BigBitMask.AND(arg, ...)
Returns: new instance of BigBitMask
Applies a bitwise AND operation between BigBitMask instances and returns the result as a new BigBitMask instance. The arguments are expected to be BigBitMask instances or a single non-empty BigBitMask array.
BigBitMask.XOR(arg, ...)
Returns: new instance of BigBitMask
Applies a bitwise XOR operation between BigBitMask instances and returns the result as a new BigBitMask instance. The arguments are expected to be BigBitMask instances or a single non-empty BigBitMask array.
License
Copyright (C) 2020-2022 Aleksej Solomatin