step: find oeis sequence starting with smth.

index.md

@@ -3,6 +3,17 @@
 nimble install https://github.com/nim-lang/bigints
 https://nimdocs.com/nim-lang/bigints/bigints.html
 
+## Dependencies
+
+The data folder is not included, but its contents are:
+
+.
+├── data
+│   ├── stripped
+│   └── stripped.gz
+
+Where stripped.gz can be found at <https://oeis.org/wiki/JSON_Format,_Compressed_Files>
+
 ## To do
 
 - [ ] Exploration of OEIS data

jit_bayes.nim

@@ -6,15 +6,30 @@ import bigints # type: BigInt
 
 let file_path = "./data/stripped"
 
+proc startsWithSubsequence(xs: seq[string], ys: seq[string]): bool = 
+  if xs.len == 0:
+    return true
+  elif ys.len == 0:
+    return false
+  elif xs[0] == ys[0]:
+    return startsWithSubsequence(xs[1..<xs.len], ys[1..<ys.len])
+  else:
+    return false
+
 let f = open(file_path)
 var line : string
+
 var i = 0
+var start = @["1", "2", "3"]
+var seqs: seq[seq[string]]
 while f.read_line(line):
   if i > 3:
-    let arr = split(line, ",")
+    let seq = split(line, ",")
-    let l = arr.len
+    let l = seq.len
-    let nums = arr[1..(l-2)] # .map(proc (x: string): BigInt = initBigInt(x))
+    let nums = seq[1..(l-2)] # .map(proc (x: string): BigInt = initBigInt(x))
-    # echo nums
+    if startsWithSubsequence(start, nums):
+      seqs.add(nums)
   i = i + 1
-
 f.close()
+
+echo seqs

scratchpad/seqs.nim

@@ -0,0 +1 @@
+echo @[ "1", "2" ] in @["1", "2", "3" ]