File size distribution: Difference between revisions

=={{header|Nim}}==

<lang Nim>import math, os, strformat

const

MaxPower = 10

Powers = [1, 10, 100]

func powerWithUnit(idx: int): string =

## Return a string representing value 10^idx with a unit.

if idx < 0:

"0B"

elif idx < 3:

fmt"{Powers[idx]}B"

elif idx < 6:

fmt"{Powers[idx - 3]}kB"

elif idx < 9:

fmt"{Powers[idx - 6]}MB"

else:

fmt"{Powers[idx - 9]}GB"

# Retrieve the directory path.

var dirpath: string

if paramCount() == 0:

dirpath = getCurrentDir()

else:

dirpath = paramStr(1)

if not dirExists(dirpath):

raise newException(ValueError, "wrong directory path: " & dirpath)

# Distribute sizes.

var counts: array[-1..MaxPower, Natural]

for path in dirpath.walkDirRec():

if not path.fileExists():

continue # Not a regular file.

let size = getFileSize(path)

let index = if size == 0: -1 else: log10(size.float).toInt

inc counts[index]

# Display distribution.

let total = sum(counts)

echo "File size distribution for directory: ", dirpath

echo ""

for idx, count in counts:

let rangeString = fmt"[{powerWithUnit(idx)}..{powerWithUnit(idx + 1)}[:"

echo fmt"Size in {rangeString: 14} {count:>7} {100 * count / total:5.2f}%"

echo ""

echo "Total number of files: ", sum(counts)</lang>

{{out}}

<pre>File size distribution for directory: /home/xxx

Size in [0B..1B[: 2782 1.28%

Size in [1B..10B[: 145 0.07%

Size in [10B..100B[: 2828 1.30%

Size in [100B..1kB[: 20781 9.55%

Size in [1kB..10kB[: 85469 39.29%

Size in [10kB..100kB[: 86594 39.81%

Size in [100kB..1MB[: 16629 7.64%

Size in [1MB..10MB[: 2053 0.94%

Size in [10MB..100MB[: 221 0.10%

Size in [100MB..1GB[: 38 0.02%

Size in [1GB..10GB[: 0 0.00%

Size in [10GB..100GB[: 0 0.00%

Total number of files: 217540</pre>