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Task/Rep-string/Python/rep-string-1.py

@@ -0,0 +1,23 @@
+def is_repeated(text):
+    'check if the first part of the string is repeated throughout the string'
+    for x in range(len(text)//2, 0, -1):
+        if text.startswith(text[x:]): return x
+    return 0
+
+matchstr = """\
+1001110011
+1110111011
+0010010010
+1010101010
+1111111111
+0100101101
+0100100
+101
+11
+00
+1
+"""
+for line in matchstr.split():
+    ln = is_repeated(line)
+    print('%r has a repetition length of %i i.e. %s'
+           % (line, ln, repr(line[:ln]) if ln else '*not* a rep-string'))

Task/Rep-string/Python/rep-string-2.py

@@ -0,0 +1,30 @@
+>>> def reps(text):
+    return [text[:x] for x in range(1, 1 + len(text) // 2)
+            if text.startswith(text[x:])]
+
+>>> matchstr = """\
+1001110011
+1110111011
+0010010010
+1010101010
+1111111111
+0100101101
+0100100
+101
+11
+00
+1
+"""
+>>> print('\n'.join('%r has reps %r' % (line, reps(line)) for line in matchstr.split()))
+'1001110011' has reps ['10011']
+'1110111011' has reps ['1110']
+'0010010010' has reps ['001']
+'1010101010' has reps ['10', '1010']
+'1111111111' has reps ['1', '11', '111', '1111', '11111']
+'0100101101' has reps []
+'0100100' has reps ['010']
+'101' has reps []
+'11' has reps ['1']
+'00' has reps ['0']
+'1' has reps []
+>>>

Task/Rep-string/Python/rep-string-3.py

@@ -0,0 +1,25 @@
+import re
+
+matchstr = """\
+1001110011
+1110111011
+0010010010
+1010101010
+1111111111
+0100101101
+0100100
+101
+11
+00
+1"""
+
+def _checker(matchobj):
+    g0, (g1, g2, g3, g4) = matchobj.group(0), matchobj.groups()
+    if not g4 and g1 and g1.startswith(g3):
+        return '%r repeats %r' % (g0, g1)
+    return '%r is not a rep-string' % (g0,)
+
+def checkit(txt):
+    print(re.sub(r'(.+)(\1+)(.*)|(.*)', _checker, txt))
+
+checkit(matchstr)