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p5.js TableRow set()用法及代碼示例


p5.j​​s中p5.TableRow的set()方法用於將給定值存儲到表的給定列。可以通過列ID或名稱指定該列。

用法:

set( column, value )

參數:此方法接受上麵提到和下麵描述的兩個參數:

  • column:它是一個字符串或數字,表示列的名稱或列的ID。
  • value:它是一個字符串或數字,用於指定必須存儲的值。

以下示例說明了p5.js中的set()方法:

範例1:



javascript

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 < 3; c++) { 
  
      // Get the row of the table 
      let tableRow = table.rows[r]; 
  
      // Set the value at the given 
      // column of the row 
      tableRow.set(c, r + "::" + c); 
    } 
  } 
  
  showTable(); 
} 
  
function showTable() { 
  clear(); 
  text("The values of the table are " + 
       "added using the set() method", 
       20, 20); 
  
  // Show all the columns present 
  for (let c = 0; c < 3; c++) { 
    text(table.columns, 
         20 + 100 * c, 80); 
  } 
  
  // Show all the rows currently 
  // present in the table 
  for (let r = 0; r < 5; r++) { 
    for (let c = 0; c < 3; c++) { 
      text(table.getString(r, c), 
           20 + 100 * c, 120 + 20 * r); 
    } 
  } 
}

輸出:


範例2:

javascript

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, 0 + " " + 0); 
    } 
  } 
  
  showTable(); 
} 
  
function modifyTable() { 
  for (let r = 0; r < 5; r++) { 
  
    // Get the row of the table 
    let tableRow = table.rows[r]; 
  
    for (let c = 0; c < 5; c++) { 
  
      // If the index of the table is 
      // a diagonal, set it to "XX" 
      if (r == c)  
        tableRow.set(c, "XX"); 
      if (r + c == 4) 
        tableRow.set(c, "YY"); 
    } 
  } 
  
  showTable(); 
} 
  
function showTable() { 
  clear(); 
  text("The values are added and " + 
       "modified using the set() method", 
       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); 
    } 
  } 
}

輸出:

在線編輯: https://editor.p5js.org/
環境設置: https://www.geeksforgeeks.org/p5-js-soundfile-object-installation-and-methods/
參考: https://p5js.org/reference/#/p5.TableRow/set




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注:本文由純淨天空篩選整理自sayantanm19大神的英文原創作品 p5.TableRow set() Method。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。