p5.Table set() 方法
p5.js 中 p5.Table 的set() 方法用于将给定的值存储到表的给定行和列中。行可以由行 ID 指定,列可以由其列 ID 或名称指定。
句法:
set( row, column, value )
参数:此函数接受三个参数,如上所述,如下所述:
- row:它是一个数字,表示行的行ID。
- column:它是一个字符串或数字,表示列的名称或列的 ID。
- value:它是一个字符串或数字,指定必须存储的值。
下面的示例说明了 p5.js 中的set() 方法:
示例 1:
function setup() {
createCanvas(500, 300);
textSize(18);
text("Click on the button to set the" +
" values of the table", 20, 20);
setBtn = createButton("Add Table Values");
setBtn.position(30, 40);
setBtn.mouseClicked(setTableData);
// Create the table
table = new p5.Table();
// Add 5 columns and rows to the table
for (let i = 0; i < 5; i++) {
table.addColumn("Column " + i);
table.addRow();
}
}
function setTableData() {
for (let r = 0; r < 5; r++) {
for (let c = 0; c < 5; c++) {
// Set the value at the given
// column and row of the table
table.set(r, c, r + " " + c);
}
}
showTable();
}
function showTable() {
clear();
text("Click on the button to set the" +
" values of the table", 20, 20);
// Show all the columns present
for (let c = 0; c < 5; c++) {
text(table.columns, 20 + 80 * c, 80);
}
// Show all the rows currently
// present in the table
for (let r = 0; r < 5; r++) {
for (let c = 0; c < 5; c++) {
text(table.getString(r, c),
20 + 80 * c,
100 + 20 * r);
}
}
}
输出:
示例 2:
function setup() {
createCanvas(500, 300);
textSize(18);
changeBtn =
createButton("Modify Table");
changeBtn.position(30, 40);
changeBtn.mouseClicked(modifyTable);
// Create the table
table = new p5.Table();
// Add 5 columns and rows to the table
for (let i = 0; i < 5; i++) {
table.addColumn("Column " + i);
table.addRow();
}
setTableData();
// Display the table
showTable();
}
function setTableData() {
for (let r = 0; r < 5; r++) {
for (let c = 0; c < 5; c++) {
// Set the value at the given
// column and row of the table
table.set(r, c, r + " " + c);
}
}
showTable();
}
function modifyTable() {
for (let r = 0; r < 5; r++) {
for (let c = 0; c < 5; c++) {
// If the index of the table is
// a diagonal, set it to "XX"
if (r == c) table.set(r, c, "XX");
}
}
showTable();
}
function showTable() {
clear();
text("Click on the button to set the" +
" values of the table", 20, 20);
// Show all the rows currently
// present in the table
for (let r = 0; r < 5; r++) {
for (let c = 0; c < 5; c++) {
text(table.getString(r, c),
20 + 80 * c,
80 + 20 * r);
}
}
}
输出:
在线编辑器: https://editor.p5js.org/
环境设置: https://www.geeksforgeeks.org/p5-js-soundfile-object-installation-and-methods/
参考: https://p5js.org/reference/#/p5.Table/set