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Type: Posts; User: David_B

1. ## Thread: Machine (Numeric) Constants in Javascript

by David_B
Replies
9
Views
2,600

### I use DBL_EPSILON in several numerical routines;...

I use DBL_EPSILON in several numerical routines; some background is provided in a blog post:

Free Math Tools for Science and Engineering Students

For a root-finding routine, a root can...
2. ## Thread: Machine (Numeric) Constants in Javascript

by David_B
Replies
9
Views
2,600

### Okay, this opens up a can of worms for me. ...

Okay, this opens up a can of worms for me.

Some of my JavaScript routines use a value of machine epsilon (DBL_EPSILON) that is computed by brute force:

var temp1, temp2, mchEps
temp1 = 1.0...
3. ## Thread: Machine (Numeric) Constants in Javascript

by David_B
Replies
9
Views
2,600

### That's correct. Those numbers correspond to the...

That's correct. Those numbers correspond to the values C++ returns for DBL_MAX and DBL_MIN--the quantities for type double variables.
What I'd like now are corresponding values in JavaScript for...
4. ## Thread: Machine (Numeric) Constants in Javascript

by David_B
Replies
9
Views
2,600

### Machine (Numeric) Constants in Javascript

I am updating some code in JavaScript which presently uses the numeric constant Number.MIN_VALUE, which I believe represents the smallest number of type double which can be used in Javascript.
It...

by David_B
Replies
5
Views
11,288

### The site seems simple enough, nice and...

The site seems simple enough, nice and clean--perhaps too clean.

6. ## Thread: Javascript Version of quiet_NaN()?

by David_B
Replies
1
Views
3,804

### Javascript Version of quiet_NaN()?

Some background:
I write numerical programs.
I usually write them in C++ and then translate them to JavaScript for posting on a web page.
In C++, I like to initialize variables to NaN using the...
7. ## Thread: Sending mass email (about 50,000 emails) - is this possible?

by David_B
Replies
16
Views
24,668

### Your regular email client is Microsoft Outlook,...

Your regular email client is Microsoft Outlook, Eudora, Mozilla Thunderbird, ... whatever product you use to send and receive emails.
If the mail-out is going to be one time, you could just...
8. ## Thread: Changing Wordpress post title sizes

by David_B
Replies
2
Views
5,076

### When you say "this", do you mean restricting the...

When you say "this", do you mean restricting the number of blog posts displayed, or changing the font size?

To restrict the number of posts displayed to 3, you could edit the PHP code of the page...
9. ## Thread: Sending mass email (about 50,000 emails) - is this possible?

by David_B
Replies
16
Views
24,668

### I mean, are you planning to send out a newsletter...

I mean, are you planning to send out a newsletter once a year, once a month, once a week, etc.?
If it is going to be a one-time mass mail-out, having people go through the double opt-in process...
10. ## Thread: Sending mass email (about 50,000 emails) - is this possible?

by David_B
Replies
16
Views
24,668

### Keep in mind that to use a newsletter service...

Keep in mind that to use a newsletter service like mailchimp or constantcontact, all users would have to double opt-in to the newsletter:
11. ## Thread: Copy form to Clipboard

by David_B
Replies
4
Views
6,258

### Could you explain a little more about what you...

Could you explain a little more about what you are trying to do?

Here is what I am picturing so far:

users go online,
they fill in a form,
the form is emailed to you,
you would like to copy...

by David_B
Replies
4
Views
1,788

### In addition to Vertical Response and Constant...

In addition to Vertical Response and Constant Contact, there are also the following:

AWeber
http://www.aweber.com/

MailChimp
http://www.mailchimp.com/
Has a free option.
...
13. ## Thread: Is there anyway to find out most common search terms

by David_B
Replies
2
Views
7,825

### There are many keyword suggestion tools. Many...

There are many keyword suggestion tools.

Many are online and free, for example, the following two:

and

Traffic Checker
14. ## Thread: Counter for hits on website..

by David_B
Replies
4
Views
1,163

### There are many hit counters for tracking traffic...

There are many hit counters for tracking traffic to a website.

Statcounter is one.

15. ## Thread: web site with latest news

by David_B
Replies
3
Views
801

### Sounds like you want to add an RSS feed to your...

First, you would have to style your web page such that the news displays in the proper part of the web page (i.e. -...
16. ## Thread: Meta Tags ---- YES or NO

by David_B
Replies
17
Views
2,632

### From my own readings on this topic lately, the...

From my own readings on this topic lately, the concensus seems to be to spend a little time on META tags, but not a lot. The big search engines, such as Google, are said to have downplayed the...

by David_B
Replies
12
Views
3,177

Generally, Google doesn't show all links to a site in any case, just the links it considers important. So even though Google might know links to your site exist, it doesn't necessarily list them on a...
18. ## Thread: Web Statistics Program

by David_B
Replies
9
Views
1,691

### I use a free tracker from Extreme Tracking: ...

I use a free tracker from Extreme Tracking:

Extreme Tracking

Their paid tracker is supposed to be much better, but the free version already gives more information than I need anyhow: IP...

by David_B
Replies
14
Views
3,442

### Right now, I am focusing on translating several...

Right now, I am focusing on translating several LAPACK routines (numerical mathematics) into "C" and then into Javascript:

Numerical Mathematics Routines

Regards,

David
20. ## Thread: Commenting Out a Big Block of Code in JS

by David_B
Replies
3
Views
10,404

### The block of code to be commented out includes...

The block of code to be commented out includes some multi-line comments. So if I then wrap the whole block in a /* */, the first instance of */ would cause the browser to think the comments are...
21. ## Thread: Commenting Out a Big Block of Code in JS

by David_B
Replies
3
Views
10,404

### Commenting Out a Big Block of Code in JS

When I start a new program, I write it in "C++" first because "C++" offers many more debugging tools than Javascript. I can step through the program one line at a time, view variables, set variables,...
22. ## Thread: best web design program

by David_B
Replies
31
Views
7,330

### Dreamweaver is good, but it's a commercial...

Dreamweaver is good, but it's a commercial product (\$\$\$\$).

FrontPage adds a lot of extra code to a page; I would avoid it. I think even Microsoft has come to the realization it is not very good...
23. ## Thread: C or C++?

by David_B
Replies
14
Views
2,723

### Can you even purchase a "C" compiler anymore? I...

Can you even purchase a "C" compiler anymore? I think everything is "C++".

Myself, I use Microsoft's Visual C++ version 6, and am planning to upgrade soon. However, my programming usually only...
24. ## Thread: Help with script!

by David_B
Replies
20
Views
2,667

### There are many similar Javascript programs posted...

There are many similar Javascript programs posted on the Internet, including one of my own: