In each iteration, the algorithm will produce all of the permutations that end with the element that has just been moved to the "last" position.

Heap's algorithm generates all possible permutations of n objects.

It generates each permutation from the previous one by interchanging a single pair of elements; the other n-2 elements are not disturbed

First set a counter i to 0. Now we perform the following steps repeatedly until i is equal to n.

We use the algorithm to generate the (n-1)! permutations of the first n-1 elements, adjoining the last element to each of these.

Thus we generate all of the permutations that end with the last element.

Then if n is odd, we switch the first element and the last one.

If n is even, we switch the i-th element with the last one.

Note that there's no difference between n even and n odd in the first iteration.

Now we add one to the counter i and repeat.

It's hard to believe a kid hitting golf balls in the cow pastures of New Mexico could have accomplished what I have accomplished.

It wasn't until 'Thor' that I started lifting weights. It was all pretty new to me.

Very seldom in my fiction have I directly used the stories people have told me. I think ripping off people's lives in fiction is dangerous. It also lacks imagination.

Happy is the home with at least one cat.

When you make movies based on real life, you try to exaggerate it.

There are two choices available in duality one side or the other side. Everyting is formed from that.

The apostle Paul never seemed to exhaust the topic of grace - what makes us think we can? He just kept coming at it and coming at it from another angle. That's the thing about grace. It's like springtime. You can't put it in a single sentence definition, and you can't exhaust it.

Researching 'Lone Wolf,' I was amazed at how thoughtful and intelligent these animals are. There has never been a documented attack against a human by a wolf that wasn't provoked by the human.

The courage to say no, the courage to say yes. Decisions do determine Destiny.

For me, a lot of my work has dealt with what it means to be at the center of the universe and how alienating and kind of seductive it is. A lot of my work is very aggressive and very visual, but at the same time, it has a lot of tension in it and makes you kind of uncomfortable sometimes.

Don't rock the boat

Science, as opposed to technology, does violence to common sense.

The rim is looking bigger and bigger every game.

Some folks look at me and see a certain swagger, which in Texas is called "walking."

The novel doesn't come into existence until certain methods of reproducing fiction come along.

Of the Sturges family, much more is known than is available about poor Irish immigrants and obscure Scottish-English settlers around Rochester.

I want to be able to play trailer-bound fatties in a Judd Apatow comedy.

I started in high school and regional theater. Anything that came into town, I wanted to be involved in, because I just wanted to learn.

I've always felt robbed of something by people not knowing I was a Jew.

Inner peace is beyond victory or defeat.

As a literature of change driven by technology, science fiction presents religion to a part of the reading public that probably seldom goes to church.

Let me put it this way: I don't plan to retire. What would I do, become a brain surgeon? I mean, a brain surgeon can retire and write novels, but a novelist can't retire and do brain surgery - or at least he better not.

Gun bans disarm victims putting them at the mercy of murderers or terrorists who think nothing of breaking the gun laws.

I want a desirable place to work to attract and keep them here. So you try to create an environment for people to do their best work, and be generous on the benefit side.