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p5.js TableRow set()用法及代码示例


p5.j​​s中p5.TableRow的set()方法用于将给定值存储到表的给定列。可以通过列ID或名称指定该列。

用法:

set( column, value )

参数:此方法接受上面提到和下面描述的两个参数:

  • 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,用于指定必须存储的值。

以下示例说明了p5.js中的set()方法:

范例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); 
    } 
  } 
}

输出:


范例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); 
    } 
  } 
}

输出:

在线编辑: 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.TableRow/set




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注:本文由纯净天空筛选整理自sayantanm19大神的英文原创作品 p5.TableRow set() Method。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。