/usr/share/boost-build/util/sequence.py is in libboost1.54-tools-dev 1.54.0-4ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | # (C) Copyright David Abrahams 2002. Permission to copy, use, modify, sell and
# distribute this software is granted provided this copyright notice appears in
# all copies. This software is provided "as is" without express or implied
# warranty, and with no claim as to its suitability for any purpose.
import operator
def unique (values, stable=False):
if stable:
s = set()
r = []
for v in values:
if not v in s:
r.append(v)
s.add(v)
return r
else:
return list(set(values))
def max_element (elements, ordered = None):
""" Returns the maximum number in 'elements'. Uses 'ordered' for comparisons,
or '<' is none is provided.
"""
if not ordered: ordered = operator.lt
max = elements [0]
for e in elements [1:]:
if ordered (max, e):
max = e
return max
def select_highest_ranked (elements, ranks):
""" Returns all of 'elements' for which corresponding element in parallel
list 'rank' is equal to the maximum value in 'rank'.
"""
if not elements:
return []
max_rank = max_element (ranks)
result = []
while elements:
if ranks [0] == max_rank:
result.append (elements [0])
elements = elements [1:]
ranks = ranks [1:]
return result
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