p5.js |字节()函数
p5.js 中的byte()函数用于将给定的数字、数值或布尔值字符串转换为其字节表示形式。这个字节数只能是介于-128到127之间的整数。超出范围的值将转换为其相应的字节表示。
句法:
byte(Value)
参数:此函数接受单个参数值,该值将被转换为其字节表示。该值可能是整数、浮点数、字符串、布尔值、负值或正值以及值数组。
返回值:它返回转换后的字节表示。
下面的程序说明了 p5.js 中的 byte()函数:
示例 1:此示例使用 byte()函数将输入元素转换为其字节表示形式。
javascript
function setup() {
// Creating Canvas size
createCanvas(600, 230);
}
function draw() {
// Set the background color
background(220);
// Initializing some values
let Value1 = 12;
let Value2 = 12.5;
let Value3 = -7.9;
let Value4 = -6;
let Value5 = "6";
let Value6 = 0;
// Calling to byte() function.
let A = byte(Value1);
let B = byte(Value2);
let C = byte(Value3);
let D = byte(Value4);
let E = byte(Value5);
let F = byte(Value6);
// Set the size of text
textSize(16);
// Set the text color
fill(color('red'));
// Getting byte representation
text("Byte representation of value 12 is: " + A, 50, 30);
text("Byte representation of value 12.5 is: " + B, 50, 60);
text("Byte representation of value -7.9 is: " + C, 50, 90);
text("Byte representation of value -6 is: " + D, 50, 110);
text("Byte representation of string '6' is: " + E, 50, 140);
text("Byte representation of string 0 is: " + F, 50, 170);
}
javascript
function setup() {
// Creating Canvas size
createCanvas(600, 140);
}
function draw() {
// Set the background color
background(220);
// Initializing some values
let Value1 = true;
let Value2 = false;
let Value3 = "Geeks";
let Value4 = [12, 3.6, -9.8, true, false];
// Calling to byte() function.
let A = byte(Value1);
let B = byte(Value2);
let C = byte(Value3);
let D = byte(Value4);
// Set the size of text
textSize(16);
// Set the text color
fill(color('red'));
// Getting byte representation
text("Byte representation of value 'true' is: " + A, 50, 30);
text("Byte representation of value 'false' is: " + B, 50, 60);
text("Byte representation of value 'Geeks' is: " + C, 50, 90);
text("Byte representation of array of values are: " + D, 50, 110);
}
输出:
示例 2:此示例使用 byte()函数将输入元素转换为其字节表示形式。
javascript
function setup() {
// Creating Canvas size
createCanvas(600, 140);
}
function draw() {
// Set the background color
background(220);
// Initializing some values
let Value1 = true;
let Value2 = false;
let Value3 = "Geeks";
let Value4 = [12, 3.6, -9.8, true, false];
// Calling to byte() function.
let A = byte(Value1);
let B = byte(Value2);
let C = byte(Value3);
let D = byte(Value4);
// Set the size of text
textSize(16);
// Set the text color
fill(color('red'));
// Getting byte representation
text("Byte representation of value 'true' is: " + A, 50, 30);
text("Byte representation of value 'false' is: " + B, 50, 60);
text("Byte representation of value 'Geeks' is: " + C, 50, 90);
text("Byte representation of array of values are: " + D, 50, 110);
}
输出:
注意:从上面的例子中,如果参数是任何小数值,那么它的输出将是它的整数等价物,即,它的范围和字符串之间的整数应该是数字,否则它给出输出 NaN,即,不是数字。
参考: https://p5js.org/reference/#/p5/byte