There is a related issue of the feasibility but impracticality of exactly representing irrational numbers like sqrt(2), independently of the base. And of course transcendentals can never be represented exactly. The most insidious aspect of this is in 3-d modeling, where it’s often necessary to test if a point is above, on, or below a plane defined by 3 other points. The effect is sometimes to create triangles with a missing edge, which can wreak havoc on structural analysis software.

Oh my God, now I really feel stupid

Pages vs. Posts

clock

If you’re new to WordPress you may be wondering what’s the big deal behind Pages and Posts. At first glance they appear to be one and the same: if you were to create either a new page or a new post you’d be presented with nearly identical interfaces and in many cases the public appearance of pages and posts will look the same.

Don’t let this fool you. There’s a very fundamental difference between the two and that difference is what makes CMSs, like WordPress, great platforms for integrating blogs with traditional websites.

Pages

Think about the kind of pages that make up a typical website. Most often you’ll see pages like “Home”, “About Us”, “Services”, “Contact Us”, etc. Within WordPress these are often treated as Pages; documents that have no particular regard for the time they were posted.

For example, when you visit the “About Us” page of your favorite company’s website you don’t expect the content to be very different from what was available there a week ago.

Read more >

Categories and Tags

desktop

If you write about a variety of subjects, categories can help your readers find the posts that are most relevant to them. For instance, if you run a consulting business, you may want some of your posts to reflect work you’ve done with previous clients, while having other posts act as informational resources. In this particular case, you can set up 2 categories: one labeled Projects and another labeled Resources. You’d then place your posts in their respective categories.

Read more >