count words

[Yin99]

I have some innerHTML stored as a string, and I would like to know how
many time throughout the whole innerHTML the occurence of "Hello<BR>"
occurs. I was wondering if RegEx or some elequant method exists?

Thanks,
Yin
For example: InnerHtml = <b>thisis Hello<BR>
&npsb<script>Alert("Test")</script>Hello<BR>

I would like to use Javascript to parse this and return me answer of
2, since the string
Hello<BRoccurs exactly twice.

[Dan Rumney]

Yin99 wrote:

I have some innerHTML stored as a string, and I would like to know how
many time throughout the whole innerHTML the occurence of "Hello<BR>"
occurs. I was wondering if RegEx or some elequant method exists?

Thanks,
Yin
For example: InnerHtml = <b>thisis Hello<BR>
&npsb<script>Alert("Test")</script>Hello<BR>

I would like to use Javascript to parse this and return me answer of
2, since the string
Hello<BRoccurs exactly twice.

innerHTML.match(/Hello\<BR\>/g).length

[Thomas 'PointedEars' Lahn]

Dan Rumney wrote:

Yin99 wrote:

>I have some innerHTML stored as a string, and I would like to know how
many time throughout the whole innerHTML the occurence of "Hello<BR>"
occurs. I was wondering if RegEx or some elequant method exists?
[...]

For example: InnerHtml = <b>thisis Hello<BR>
&npsb<script>Alert("Test")</script>Hello<BR>

I would like to use Javascript to parse this and return me answer of
2, since the string
Hello<BRoccurs exactly twice.

innerHTML.match(/Hello\<BR\>/g).length

`<' and `>' do not need to be escaped. Also, if there is no match,
String.prototype.match() will return `null' and `null' has no properties
which is why the `length' property access would result in a TypeError.
Therefore:

(InnerHtml.match(/Hello<BR>/g) || "").length

(ECMAScript identifiers are case-sensitive.)
PointedEars
--
Prototype.js was written by people who don't know javascript for people
who don't know javascript. People who don't know javascript are not
the best source of advice on designing systems that use javascript.
-- Richard Cornford, cljs, <f8*******************@news.demon.co.uk>

[david.karr]

On Jun 5, 5:46 pm, Thomas 'PointedEars' Lahn <[e-mail]>
wrote:

Dan Rumney wrote:

Yin99 wrote:
[deleted]
innerHTML.match(/Hello\<BR\>/g).length

`<' and `>' do not need to be escaped. Also, if there is no match,
String.prototype.match() will return `null' and `null' has no properties
which is why the `length' property access would result in a TypeError.
Therefore:

(InnerHtml.match(/Hello<BR>/g) || "").length

Wouldn't that return a count of 1 when it didn't match anything?

[Dan Rumney]

david.karr wrote:
[snip]

>Therefore:

(InnerHtml.match(/Hello<BR>/g) || "").length

Wouldn't that return a count of 1 when it didn't match anything?

No

(Checked with Firebug)

alert("".length) displays '0'

[Thomas 'PointedEars' Lahn]

david.karr wrote:

Thomas 'PointedEars' Lahn wrote:

>Dan Rumney wrote:

>>Yin99 wrote:
[deleted]
innerHTML.match(/Hello\<BR\>/g).length

`<' and `>' do not need to be escaped. Also, if there is no match,
String.prototype.match() will return `null' and `null' has no properties
which is why the `length' property access would result in a TypeError.
Therefore:

(InnerHtml.match(/Hello<BR>/g) || "").length

Wouldn't that return a count of 1 when it didn't match anything?

My Magic 8 Ball says: Unlikely.

(Since when has the empty string a length of 1 instead of 0?)
PointedEars
--
Use any version of Microsoft Frontpage to create your site.
(This won't prevent people from viewing your source, but no one
will want to steal it.)
-- from <http://www.vortex-webdesign.com/help/hidesource.htm>

[Dr J R Stockton]

In comp.lang.javascript message <0f8eb53f-534e-49f1-90c4-2ab9e7f9e26a@2g
2000hsn.googlegroups.com>, Thu, 5 Jun 2008 15:09:23, Yin99
<[e-mail]:

>I have some innerHTML stored as a string, and I would like to know how
many time throughout the whole innerHTML the occurence of "Hello<BR>"
occurs. I was wondering if RegEx or some elequant method exists?

One way is to use D.replace(/Hello<BR>/g) and see how much shorter
that is.

Another : S.match(/(Hello<BR>)/g).length - if the string varies,
use new RegExp rather than a literal.

If using .split("Hello<BR>") you may need to be concerned about the
possibility of it being first or last, and which browser is in use.

See also in <URL:http://www.merlyn.demon.co.uk/js-valid.htm#SSRA>.

It's a good idea to read the newsgroup c.l.j and its FAQ. See below.

--
(c) John Stockton, nr London UK. ?@merlyn.demon.co.uk IE7 FF2 Op9 Sf3
news:comp.lang.javascript FAQ <URL:http://www.jibbering.com/faq/index.html>.
<URL:http://www.merlyn.demon.co.uk/js-index.htmjscr maths, dates, sources.
<URL:http://www.merlyn.demon.co.uk/TP/BP/Delphi/jscr/&c, FAQ items, links.