p5.Table removeTokens() 方法
p5.js 中 p5.Table 的removeTokens() 方法用于从表中的值中删除所有指定的字符。可以指定特定列以仅从该列中删除标记。但是,如果未指定列,则处理表中所有列和行的值。
句法:
removeTokens( chars, [column] )
参数:该函数接受上面提到的两个参数,如下所述:
- chars:它是一个字符串,指定所有必须删除的字符。
- column:它是一个String或整数,指定要修剪的列的列名或ID。它是一个可选参数。
下面的示例说明了 p5.js 中的removeTokens() 方法。
示例 1:
function setup() {
createCanvas(500, 300);
textSize(16);
tokensInput = createInput();
tokensInput.position(30, 40)
trimBtn =
createButton("Remove specified tokens");
trimBtn.position(30, 80);
trimBtn.mouseClicked(cleanTableData);
// Create the table
table = new p5.Table();
// Add two columns
table.addColumn("subject");
table.addColumn("performance");
// Add some rows to the table
let newRow = table.addRow();
newRow.setString("subject",
"----Maths---");
newRow.setString("performance",
"====Good===");
newRow = table.addRow();
newRow.setString("subject",
" English");
newRow.setString("performance",
"__-Excellent--");
newRow = table.addRow();
newRow.setString("subject",
"Science");
newRow.setString("performance",
",,, ;;OK;");
showTable();
}
function cleanTableData() {
let tokensToRemove = tokensInput.value();
// Remove given tokens only from the
// whole table
table.removeTokens(tokensToRemove);
// Redraw the table
showTable();
}
function showTable() {
clear();
// Display the rows present in the table
for (let r = 0; r < table.getRowCount(); r++)
for (let c = 0; c < table.getColumnCount(); c++)
text(table.getString(r, c),
20 + c * 100,
140 + r * 20);
text("Enter the tokens that have to be" +
" removed from the table values",
20, 20);
}
输出:
示例 2:
function setup() {
createCanvas(500, 300);
textSize(16);
tokensInput = createInput();
tokensInput.position(30, 40)
trimBtn =
createButton("Remove specified tokens");
trimBtn.position(30, 80);
trimBtn.mouseClicked(cleanTableData);
// Create the table
table = new p5.Table();
// Add two columns
table.addColumn("subject");
table.addColumn("performance");
// Add some rows to the table
let newRow = table.addRow();
newRow.setString("subject",
"----Maths---");
newRow.setString("performance",
"-----Good===");
newRow = table.addRow();
newRow.setString("subject",
"-----English---");
newRow.setString("performance",
"__-Excellent--");
newRow = table.addRow();
newRow.setString("subject",
"-Science---");
newRow.setString("performance",
",,, ;OK;");
showTable();
}
function cleanTableData() {
let tokensToRemove = tokensInput.value();
// Remove given tokens only from the
// 'name' column
table.removeTokens(tokensToRemove,
'subject');
// Redraw the table
showTable();
}
function showTable() {
clear();
// Display the rows present in the table
for (let r = 0; r < table.getRowCount(); r++)
for (let c = 0; c < table.getColumnCount(); c++)
text(table.getString(r, c),
20 + c * 100,
140 + r * 20);
text("Enter the tokens that have to be" +
" removed from the table values",
20, 20);
}
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/removeTokens