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You are not calling the function intro in the last line. Instead, you are printing the function object. Change the last line to:

Remove the source function call, it doesn’t fit here (the function does something completely different).

It is telling you that you cannot invoked GLTFLoader without 'new' at new GLTFLoader

If you look at the doc you linked in the code exemple they use const loader = new GLTFLoader(); before doing anything with it.

You must instance GLTFLoader.

I figured it out! I set webview uri to be variable and didn't need more than one webview tag. As follows:

The numeral n is defined as n applications of the function f to some argument x.

Thus,

There is no x in (lambda (x) x). None.

The x in (lambda (x) x) is bound. It could be named by any name whatever. We can not talk about x in (lambda (x) x) any more than we could talk about y in (lambda (y) y).

There is no y in (lambda (y) y) to speak of. It is just a placeholder, an arbitrary name whose sole purpose in the body is to be the same as in the binder. Same, without regard for which specific name is used there as long as it is used twice -- first time in the binder, and the other time in the body.

And in fact there is this whole 'nother notation for lambda terms, called De Bruijn notation, where the same whole thing is written (lambda 1). With 1 meaning, "I refer to the argument which the binder 1 step above me receives".

So x is unimportant. What's important is (lambda (x) x) which denotes a function which returns its argument as is. The so called "identity" function.

But even this is not important here. The Church encoding of a number is really a binary function, a function expecting two arguments -- the f and the z. The "successor step" unary function f and the "zero" "value" z, whatever that might be, as long as the two go together. Make sense together. Work together.

So how come we see two unary functions there when it is really one binary function in play?

That is the important bit. It is known as currying.

In lambda calculus all functions are unary. And to represent a binary function an unary function is used, such that when given its (first) argument it returns another unary function, which, when given its (now, second) argument, performs whatever thing our intended binary function ought to perform, using those two arguments, the first and the second.

This is all very very simple if we just write it in combinatory (equational) notation instead of the lambda notation:

We need to know more about how the TreeView is built before we can answer this. It's possible there is simply not enough data associated with the TreeView right now, and the solution will be in a completely different area of the code.

However, I can provide some notes. First, reading a file is one of the slowest things possible to do in a computer. We already see this is small enough to fit in memory; if it's also reasonably stable (doesn't change often), you can save significant work by loading to the array once when the program starts.

Next, I wouldn't keep just a simple array of strings. Instead, I'd parse the data into separate fields right at load. A Tuple, Class, or even string array can all work.

Finally, this code will continue looping even after if finds a match. I'd have a way to stop once we find what we're looking for.

Put it all together like this:

Your version presupposes the existence of primitives like cond, 0, 1, =, and -. The point of all this is to show that you can implement such primitives starting from nothing but lambda.

The issue is the way a single text column is passed. I hope future version of scikit-learn would allow ['Text',] but until then pass it directly: