remove a string from within a string

[soni29]

hi,
how can i remove a string from an existing string in javascript. i
have a textbox in a form and want to make sure that when the user
clicks a button that certain words are moved, like all instances of
"hello" should be taken out of the text the user typed in the textbox.
any ideas?

thank you.

 

[Steve van Dongen]

hi,
how can i remove a string from an existing string in javascript. i
have a textbox in a form and want to make sure that when the user
clicks a button that certain words are moved, like all instances of
"hello" should be taken out of the text the user typed in the textbox.
any ideas?

An example of one method:

<script type="text/javascript">
var objCensorWords = new Array("ears", "feet", "navel");

function Censor(objForm, strElementName) {
if (objForm && objForm.elements[strElementName]) {
var objElement = objForm.elements[strElementName];
var strData = objElement.value;
for (var i=0; i<objCensorWords.length; ++i) {
var objRE = new RegExp(objCensorWords, "ig");

That should likely be
var objRE = new RegExp("\b" + objCensorWords + "\b", "ig");
so that you only match it if word boundaries exist on both sides.

Regards,
Steve

 

[rh]

hi,
how can i remove a string from an existing string in javascript. i
have a textbox in a form and want to make sure that when the user
clicks a button that certain words are moved, like all instances of
"hello" should be taken out of the text the user typed in the textbox.
any ideas?

An example of one method:

<script type="text/javascript">
var objCensorWords = new Array("ears", "feet", "navel");

function Censor(objForm, strElementName) {
if (objForm && objForm.elements[strElementName]) {
var objElement = objForm.elements[strElementName];
var strData = objElement.value;
for (var i=0; i<objCensorWords.length; ++i) {
var objRE = new RegExp(objCensorWords, "ig");
strData = strData.replace(objRE, "");

As a note, when in possession of a set of alternates in an array, it's
often more efficient to generate the RegExp as, for example:

re = new RegExp("\\b("+objCensorWords.join("|")+")\\b","ig")

thereby eliminating the need for a loop of repeated generation of
RegExps and their application to the string. Such a change will bury
the execution within standard regular expression processing.

../rh