Activity for Zakk
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Comment | Post #284049 |
From [this](https://www.open-std.org/jtc1/sc22/wg14/www/docs/n1570.pdf):
> — removed the `gets` function (`<stdio.h>`) (more) |
— | almost 2 years ago |
| Comment | Post #286394 |
> Write a **full** program
Does that mean using only the code section of some try-it-online tool?
> writes another program
Does that mean generting an executable/script file? Or only printing the program is enough?
> The length of each program must tend toward infinity as the sequence con... (more) |
— | almost 2 years ago |
| Comment | Post #284611 |
You can shorten your code by comparing `x*y` against `4`:
``` java
x->y->x*y==4?5:x+y
```
There are 3 possibilities:
$$x=2,y=2 \Longrightarrow x \times y = 5 \text{ as of the rules}$$
$$x=1,y=4 \Longrightarrow x + y = 5 \text{ still a valid result}$$
$$x=4,y=1 \Longrightarrow x + y = 5 ... (more) |
— | about 2 years ago |
| Comment | Post #286370 |
Thank you for your suggestions! The use of an array was a nice trick. (more) |
— | about 2 years ago |
| Comment | Post #286359 |
> If Lua has such a thing, you can use it without reservation.
I guess yes. If you call this a first-class function:
```
f = function(m,n)for i=0,m*n-1 do _=(i%n==0)and print()or io.write(i,' ')end end
```
So I will use it from now onwards.
> I'll add this in a Meta post later, but the... (more) |
— | about 2 years ago |
| Comment | Post #286360 |
Okay, I will change that. (more) |
— | about 2 years ago |
| Comment | Post #286359 |
I've put the function definition in the header section. I don't know if this is allowed or not. I see a lot of people doing that, putting only the relevent part/expression in the code section.
Here is the full function, 78 bytes:
``` lua
function f(m,n)for i=0,m*n-1 do _=(i%n==0)and print()or ... (more) |
— | about 2 years ago |
| Comment | Post #286311 |
Though both of `s:gsub` and `for..in` versions are equal in length, the former can be one byte shorter, because sticking an `s` to `0` doesn't make the Lua interpreter unhappy, contrary to sticking an `f` to `0`.
```
_=0s:gsub('.',function(c)_=({d=_-1,i=_+1;s=_*_})[c]or print(_)or _ _=({[256]=0,[... (more) |
— | about 2 years ago |
| Comment | Post #286311 |
> ```_=(_==256or _<0)and 0or _```
You are right.
> Tables to the rescue ^^
Man! That's just brilliant! Again, thanks for pointing this out.
Btw, I am really curious about how much experience you have with Lua. (more) |
— | about 2 years ago |
| Comment | Post #286301 |
Clever solution! Thanks! (more) |
— | about 2 years ago |
| Comment | Post #286301 |
> If your function never runs, then clearly it won't have a runtime error :)
@#53196 So calling `f()` is not necessary... If so, I will remove it. (more) |
— | about 2 years ago |
| Comment | Post #286301 |
@#56271 You are right! It can be shortened (and it prints `nil nil`). Strange how I missed this one out. Anyways, thanks (once more) for pointing this out! (more) |
— | about 2 years ago |
| Comment | Post #286301 |
> You can shorten your for-loop
No, I can't. Shortening it the way you did results in omitting the `in` keyword. This obviously goes against the rule of including **all** language keywords.
> and save a few spaces on the numerical constants
Yes, that's true. I will edit my answer. Thanks (ag... (more) |
— | about 2 years ago |
| Comment | Post #286300 |
Thanks! I will edit the code. (more) |
— | about 2 years ago |