Merge pull request #5407 from pauloscustodio/devel

Add Perl and Python solutions to challenge 032

2 files changed, 86 insertions, 0 deletions

diff --git a/challenge-032/paulo-custodio/python/ch-1.py b/challenge-032/paulo-custodio/python/ch-1.py
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+++ b/challenge-032/paulo-custodio/python/ch-1.py
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+#!/usr/bin/python3
+
+# Challenge 032
+#
+# Task #1
+# Contributed by Neil Bowers
+# Count instances
+# Create a script that either reads standard input or one or more files
+# specified on the command-line. Count the number of times and then print a
+# summary, sorted by the count of each entry.
+#
+# So with the following input in file example.txt
+#
+# apple
+# banana
+# apple
+# cherry
+# cherry
+# apple
+# the script would display something like:
+#
+# apple     3
+# cherry    2
+# banana    1
+# For extra credit, add a -csv option to your script, which would generate:
+#
+# apple,3
+# banana,1
+# cherry,2
+
+import fileinput
+import sys
+
+# command line options
+sep = "\t"
+if len(sys.argv)>1 and sys.argv[1]=="-csv":
+    sys.argv.pop(1)
+    sep = ","
+
+# count instances
+count = {}
+for line in fileinput.input():
+    word = line.strip()
+    if word in count:
+        count[word] += 1
+    else:
+        count[word] = 1
+
+# output
+for key in sorted(count):
+    print(f"{key}{sep}{count[key]}")
diff --git a/challenge-032/paulo-custodio/python/ch-2.py b/challenge-032/paulo-custodio/python/ch-2.py
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+#!/usr/bin/python3
+
+# Challenge 032
+#
+# Task #2
+# Contributed by Neil Bowers
+# ASCII bar chart
+# Write a function that takes a hashref where the keys are labels and the
+# values are integer or floating point values. Generate a bar graph of the
+# data and display it to stdout.
+#
+# The input could be something like:
+#
+# $data = { apple => 3, cherry => 2, banana => 1 };
+# generate_bar_graph($data);
+# And would then generate something like this:
+#
+#  apple | ############
+# cherry | ########
+# banana | ####
+# If you fancy then please try this as well: (a) the function could let you
+# specify whether the chart should be ordered by (1) the labels, or (2) the
+# values.
+
+data = { 'apple':3, 'cherry':2, 'banana':1 }
+
+def chart(data):
+    # get size of keys
+    width = max([len(x) for x in data])
+
+    # output data
+    for key in sorted(data):
+        print(("{:"+str(width)+"s} | {}").format(key, "##"*data[key]))
+
+chart(data)