当前位置: 首页>>编程示例 >>用法及示例精选 >>正文


p5.js Table setString()用法及代码示例

p5.j​​s中p5.Table的setString()方法用于将给定的String值存储到表的给定行和列。可以通过行ID指定行,并且可以通过其列ID或列名指定列。

用法:

setString( row, column, value )

参数:此函数接受上述和以下所述的三个参数:

  • row:它是一个数字,表示该行的行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,它指定必须存储的值。

以下示例说明了p5.js中的setString()方法:

范例1:



function setup() { 
  createCanvas(500, 300); 
  textSize(18); 
  
  text("Click the button to modify" + 
       " the table", 20, 20); 
  
  setBtn = 
    createButton("Change Status"); 
  setBtn.position(30, 60); 
  setBtn.mouseClicked(modifyTableData); 
  
  // Create the table 
  table = new p5.Table(); 
  
  // Add the columns and rows 
  table.addColumn("flight"); 
  table.addColumn("status"); 
  
  let row = table.addRow(); 
  row.setString("flight", "American Air"); 
  row.setString("status", "On Time"); 
  
  row = table.addRow(); 
  row.setString("flight", "Lufthansa"); 
  row.setString("status", "On Time"); 
  
  row = table.addRow(); 
  row.setString("flight", "United Air"); 
  row.setString("status", "Delayed"); 
  
  showTable(); 
} 
  
function modifyTableData() { 
  
  // Loop through all the rows 
  // in the table 
  for (let r = 0; r < table.getRowCount(); r++) { 
  
    // Change the string of the status column 
    if (table.getString(r, "status") == "On Time")  
      table.setString(r, "status", "Delayed"); 
    else table.setString(r, "status", "On Time"); 
  } 
  
  showTable(); 
} 
  
function showTable() { 
  clear(); 
  text("The value is modified using the" + 
       " setString() method", 20, 20); 
  
  // Show all the columns present 
  for (let c = 0; c < 2; c++) { 
    text(table.columns, 
         20 + 160 * c, 110); 
  } 
  
  // Show all the rows currently 
  // present in the table 
  for (let r = 0; r < 3; r++) { 
    for (let c = 0; c < 2; c++) { 
      text(table.getString(r, c), 
           20 + 160 * c, 
           140 + 20 * r); 
    } 
  } 
}

输出:
setString-ex1

范例2:

function setup() { 
  createCanvas(500, 300); 
  textSize(18); 
  
  setBtn = createButton("Toggle Strings"); 
  setBtn.position(30, 40); 
  setBtn.mouseClicked(modifyTableData); 
  
  // Create the table 
  table = new p5.Table(); 
  
  for (let i = 0; i < 10; i++) { 
    table.addColumn(); 
    table.addRow(); 
  } 
  
  createTable(); 
} 
  
function createTable() { 
  
  // Loop through all the rows and columns 
  // in the table and set their initial 
  // string values 
  for (let r = 0; r < table.getRowCount(); r++) { 
    for (let c = 0; c < table.getColumnCount(); c++) { 
      if ((r + c) % 2 == 0)  
        table.setString(r, c, "X"); 
      else table.setString(r, c, "O"); 
    } 
  } 
  
  showTable(); 
} 
  
function modifyTableData() { 
  
  // Loop through all the rows and columns 
  // in the table and change their values 
  // depending on the previous string 
  for (let r = 0; r < table.getRowCount(); r++) { 
    for (let c = 0; c < table.getColumnCount(); c++) { 
      if (table.getString(r, c) == "X")  
        table.setString(r, c, "O"); 
      else table.setString(r, c, "X"); 
    } 
  } 
  
  showTable(); 
} 
  
function showTable() { 
  clear(); 
  text("The value is modified using the" +  
       " setString() method", 20, 20); 
  
  // Show all the rows currently 
  // 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 + 40 * c,  
           80 + 20 * r); 
    } 
  } 
}

输出:
setString-ex2

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.Table/setString




相关用法


注:本文由纯净天空筛选整理自sayantanm19大神的英文原创作品 p5.Table setString() 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。