OCTOBER 31ST, 2008
By MOHAMMAD SAJJAD HOSSAIN
When working with JavaScript in one of my projects I needed to trim strings and pad them. I googled for a solution and many sources I have got the following codes and sharing with you.
Trimming:
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| //trimming space from both side of the string
String.prototype.trim = function() {
return this.replace(/^\s+|\s+$/g,"");
}
//trimming space from left side of the string
String.prototype.ltrim = function() {
return this.replace(/^\s+/,"");
}
//trimming space from right side of the string
String.prototype.rtrim = function() {
return this.replace(/\s+$/,"");
} |
//trimming space from both side of the string
String.prototype.trim = function() {
return this.replace(/^\s+|\s+$/g,"");
}
//trimming space from left side of the string
String.prototype.ltrim = function() {
return this.replace(/^\s+/,"");
}
//trimming space from right side of the string
String.prototype.rtrim = function() {
return this.replace(/\s+$/,"");
}
Using Trim Functions:
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| //write the code given above
var str = " black ";
alert("a" + str.trim() + "b"); //result "ablackb"
alert("a" + str.ltrim() + "b"); //result "ablack b"
alert("a" + str.rtrim() + "b"); //result "a blackb" |
//write the code given above
var str = " black ";
alert("a" + str.trim() + "b"); //result "ablackb"
alert("a" + str.ltrim() + "b"); //result "ablack b"
alert("a" + str.rtrim() + "b"); //result "a blackb"
Padding:
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| //pads left
String.prototype.lpad = function(padString, length) {
var str = this;
while (str.length < length)
str = padString + str;
return str;
}
//pads right
String.prototype.rpad = function(padString, length) {
var str = this;
while (str.length < length)
str = str + padString;
return str;
} |
//pads left
String.prototype.lpad = function(padString, length) {
var str = this;
while (str.length < length)
str = padString + str;
return str;
}
//pads right
String.prototype.rpad = function(padString, length) {
var str = this;
while (str.length < length)
str = str + padString;
return str;
}
Using Padding Functions:
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| var str = "5";
alert(str.lpad("0", 5)); //result "00005"
alert(str.rpad("0", 5)); //result "50000" |
var str = "5";
alert(str.lpad("0", 5)); //result "00005"
alert(str.rpad("0", 5)); //result "50000"
JANUARY 12TH, 2008
By MOHAMMAD SAJJAD HOSSAIN
In my last post I have shown how to duplicate a table row. Now if you let the user to duplicate a row then you will look for a solution to remove row dynamically using JavaScript. Use the following function to dynamically remove row from a table. This code is also tested on IE6 and FF2.
/**
* Removes row of a table. Finds the table with table ID
*
* @param targetTableId - Table ID
* @param targetRowIndex - index of the target row tobe removed
* @param skipRows - Number of rows to be skipped
*/
function removeRow(targetTableId, targetRowIndex, skipRows)
{
var targetTable = document.getElementById(targetTableId);
var tableBody = targetTable.tBodies [0];
var totalRows = tableBody.rows.length;
if(totalRows == skipRows)
{
return false;
}
if(targetRowIndex == undefined || targetRowIndex == "")
{
targetRowIndex = totalRows - 1;
}
if(tableBody.hasChildNodes())
{
tableBody.removeChild(tableBody.childNodes[targetRowIndex]);
}
} |
/**
* Removes row of a table. Finds the table with table ID
*
* @param targetTableId - Table ID
* @param targetRowIndex - index of the target row tobe removed
* @param skipRows - Number of rows to be skipped
*/
function removeRow(targetTableId, targetRowIndex, skipRows)
{
var targetTable = document.getElementById(targetTableId);
var tableBody = targetTable.tBodies [0];
var totalRows = tableBody.rows.length;
if(totalRows == skipRows)
{
return false;
}
if(targetRowIndex == undefined || targetRowIndex == "")
{
targetRowIndex = totalRows - 1;
}
if(tableBody.hasChildNodes())
{
tableBody.removeChild(tableBody.childNodes[targetRowIndex]);
}
}
JANUARY 5TH, 2008
By MOHAMMAD SAJJAD HOSSAIN
For some days I was looking for a JavaScript solution for duplicating table rows. I know it is simple. But I have made a function which does this very easily. I have tested this code with IE 6.0 and FireFox 2+ browsers.
Here is the JavaScript function:
/**
* This function duplicates a given row
* Author: Mohammad Sajjad Hossain
* Email: info @t sajjadhossain.com, msh134 @t gmail.com
*
* @param targetTableId - ID of the target table
* @param targetRowIndex - index of the row which to be duplicated
* @return void
*/
function duplicateRow(targetTableId, targetRowIndex)
{
if(targetRowIndex == undefined)
{
targetRowIndex = 0;
}
var targetTable = document.getElementById(targetTableId);
var tableBody = targetTable.tBodies[0];
var targetRow = tableBody.getElementsByTagName("tr")[targetRowIndex];
var newRow = targetRow.cloneNode(true);
tableBody.appendChild(newRow);
} |
/**
* This function duplicates a given row
* Author: Mohammad Sajjad Hossain
* Email: info @t sajjadhossain.com, msh134 @t gmail.com
*
* @param targetTableId - ID of the target table
* @param targetRowIndex - index of the row which to be duplicated
* @return void
*/
function duplicateRow(targetTableId, targetRowIndex)
{
if(targetRowIndex == undefined)
{
targetRowIndex = 0;
}
var targetTable = document.getElementById(targetTableId);
var tableBody = targetTable.tBodies[0];
var targetRow = tableBody.getElementsByTagName("tr")[targetRowIndex];
var newRow = targetRow.cloneNode(true);
tableBody.appendChild(newRow);
}
Example Code:
<script language="javascript">
function duplicateRow(targetTableId, targetRowIndex)
{
if(targetRowIndex == undefined)
{
targetRowIndex = 0;
}
var targetTable = document.getElementById(targetTableId);
var tableBody = targetTable.tBodies[0];
var targetRow = tableBody.getElementsByTagName("tr")[targetRowIndex];
var newRow = targetRow.cloneNode(true);
tableBody.appendChild(newRow);
}
</script> |
<script language="javascript">
function duplicateRow(targetTableId, targetRowIndex)
{
if(targetRowIndex == undefined)
{
targetRowIndex = 0;
}
var targetTable = document.getElementById(targetTableId);
var tableBody = targetTable.tBodies[0];
var targetRow = tableBody.getElementsByTagName("tr")[targetRowIndex];
var newRow = targetRow.cloneNode(true);
tableBody.appendChild(newRow);
}
</script>
<table width="500" cellspacing="0" cellpadding="0" id="tblDuplicate" border="1">
<tr>
<th>Col1</th>
<th>Col2</th>
<th>Col3</th>
<th>Col4</th>
</tr>
<tr>
<td align="center">row</td>
<td align="center">row</td>
<td align="center">row</td>
<td align="center">row</td>
</tr>
</table>
<input type="button" value="Duplicate Row" onclick="duplicateRow('tblDuplicate', 1)" /> |
<table width="500" cellspacing="0" cellpadding="0" id="tblDuplicate" border="1">
<tr>
<th>Col1</th>
<th>Col2</th>
<th>Col3</th>
<th>Col4</th>
</tr>
<tr>
<td align="center">row</td>
<td align="center">row</td>
<td align="center">row</td>
<td align="center">row</td>
</tr>
</table>
<input type="button" value="Duplicate Row" onclick="duplicateRow('tblDuplicate', 1)" />
