Activity for Zakk‭

Type	On...	Excerpt	Status	Date
Answer	—	A: Make a frequency table (histogram) Lua, 98 bytes ``` lua function(t)r={}for k,v in pairs(t)do r[v]=0 end for k,v in pairs(t)do r[v]=r[v]+1 end return r end ``` Attempt This Online! (more)	—	almost 2 years ago
Answer	—	A: Word Count Tool JavaScript (Node.js), 60 bytes ``` javascript s=>[/\w+/g,/./g,/[\S\t]/g].map(p=>(v=s.match(p))?v.length:0) ``` Attempt This Online! (more)	—	about 2 years ago
Answer	—	A: Word Count Tool Lua 5.4, 62 bytes ``` lua ,w=s:gsub('%w+',0),c=s:gsub('[^\n]',0),n=s:gsub('[%g\t]',0) ``` Attempt This Online! Another version, 65 bytes: ``` lua p={'%w+','[^\n]','[%g\t]'}for i=1,#p do ,r[i]=s:gsub(p[i],'')end ``` Attempt This Online! (more)	—	about 2 years ago
Answer	—	A: Collatz conjecture; Count the tries to reach $1$ Lua 5.4, 67 60 bytes ``` lua function(x)return x==1 and 0 or 1+f(({x/2,3x+1})[x%2+1])end ``` Attempt This Online! Credits to @Moshi for more shortening. (more)	—	about 2 years ago
Answer	—	A: Collatz conjecture; Count the tries to reach $1$ C (gcc), 43 38 bytes ``` C f(i){return i>1?f(i%2?3i+1:i/2)+1:0;} ``` Attempt This Online! Credits to @Moshi for shortening the code. (more)	—	about 2 years ago
Answer	—	A: Make $2 + 2 = 5$ C (gcc), 41 bytes ```c f(x,y){int r=xy;return r&&r==x+y?5:x+y;} ``` Attempt This Online! (more)	—	about 2 years ago
Answer	—	A: Create a range grid C (gcc), 59 bytes ``` C i;f(m,n){while(i<mn){putchar(i%n?32:13);putchar(48+i++);}} ``` Attempt This Online! `m` is the number of rows. `n` is the number of columns. (more)	—	about 2 years ago
Answer	—	A: Create a range grid Lua 5.4, 76 bytes ``` lua function(m,n)for i=0,mn-1 do =(i%n==0)and print()or io.write(i,' ')end end ``` Try it online! (more)	—	about 2 years ago
Answer	—	A: It's Hip to be Square C (gcc), 37 bytes ``` C f(n,p){while(++pp<n);return pp==n;} ``` Try it online! The solution is based on the simple fact that: $$\forall n \in \mathbb{N}, n \text{ is a perfect square} \Longleftrightarrow \exists p \in \mathbb{N}, p \le n \text{ / } p^2=n$$ (more)	—	about 2 years ago
Answer	—	A: It's Hip to be Square Lua 5.4, 9 bytes ``` lua n^.5%1==0 ``` Try it online! The entire compressed code is 33 bytes: ``` lua function f(n)return n^.5%1==0 end ``` Try it here. It's not clear whether the rules allow the first form (i.e. only the relevant expression) or the second form (i.e. the ent... (more)	—	about 2 years ago
Answer	—	A: It's Hip to be Square JavaScript (V8), 13 bytes ``` javascript x=>x.5%1==0 ``` Try it online! (more)	—	about 2 years ago
Answer	—	A: Can you give me half? Lua 5.4, 3 unique characters ``` lua #'#'/#'##' ``` Try it online! > [...] scoring is done in terms of number of unique characters used in the submission. 1. Hashtag # 2. Single quote ' 3. Slash / (more)	—	about 2 years ago
Answer	—	A: The Pell Numbers C (gcc), 35 bytes ``` C f(n){return n<2?n:f(n-1)2+f(n-2);} ``` Try it online! (more)	—	about 2 years ago
Answer	—	A: The Pell Numbers Lua 5.4.4, 51 bytes ``` lua function f(n)return n<2 and n or f(n-1)2+f(n-2)end ``` Try it online! (more)	—	about 2 years ago
Answer	—	A: Write a Deadfish Interpreter JavaScript (V8), 78 bytes ``` javascript f=s=>s.map(c=>(==256||<0?=0:0)||c=='i'?++:c=='d'?--:c=='s'?=:v+=+' ') ``` Try it online! (more)	—	about 2 years ago
Answer	—	A: Write a Deadfish Interpreter C (gcc), 98 bytes ``` c =0;f(chars){for(;s;++s)==256||<0?=0:1,s=='i'?++:s=='d'?--:s=='s'?=:printf("%d ",);} ``` Try it online! (more)	—	about 2 years ago
Answer	—	A: Write a Deadfish Interpreter Lua 5.4.4, 99 bytes ``` =0s:gsub('.',function(c)=({d=-1,i=+1;s=})[c]or print()or =({[256]=0,[-1]=0})[]or end) ``` Try it online! Thanks to @orthoplex for more shortening. (more)	—	about 2 years ago
Answer	—	A: Keyword golfing Lua 5.4.4, 147 bytes ``` local function f()goto l::l::return end for in f do end if true and false then elseif""then else end repeat until""or not nil while""do break end ``` Try it online! Check the list of keywords. Thanks to @orthoplex for more shortening. (more)	—	about 2 years ago
Answer	—	A: Looping counter Lua, 31 bytes ``` =''::::=..''print()goto ``` Try it online! (more)	—	about 2 years ago