Kaiwen kkew3
kkew3
/ appselector.sh
Last active
December 15, 2022 02:40
Get the bundle identifier of a macOS app. Can be used to set `ascii_mode` of [`Squirrel`](https://rime.im) for apps.
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| #!/bin/bash | |
| set -e | |
| set -o pipefail | |
| fd -g -td \*.app /System/Library/CoreServices /System/Applications /Applications . \ | |
| | fzf --multi --exact --query="$1" |
kkew3
/ mk_zip_patch.py
Created
May 15, 2022 08:55
Make a `patch.zip` file from `old.zip` file to `new.zip` file, including all changed and newly added files. Also generate a patch shell script `patch.sh` that removes all files unique to `old.zip`.
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| import os | |
| import argparse | |
| import collections | |
| import tempfile | |
| import zipfile | |
| import filecmp | |
| import shutil | |
| import shlex | |
| ZipCmpResult = collections.namedtuple('ZipCmpResult', |
kkew3
/ pyimports.py
Last active
May 14, 2022 22:02
Find all Python imports in source file(s) and/or ipython notebooks, and optionally exclude installed modules, effectively creating a requirements.txt candidate. Python 2.7/3.x compatible.
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| from __future__ import print_function | |
| import argparse | |
| import os | |
| import ast | |
| import sys | |
| import pkgutil | |
| import itertools | |
| import logging | |
| import json |
kkew3
/ cjkjust.py
Last active
February 9, 2022 09:58
Python `str.ljust` and `str.rjust` for CJK characters mixed with ASCII characters string.
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| __all__ = [ | |
| 'cjkljust', | |
| 'cjkrjust', | |
| 'cjkcenter', | |
| ] | |
| import unicodedata | |
| #def cjklen(string): | |
| # return sum(2 if unicodedata.east_asian_width(char) in 'FW' else 1 |
kkew3
/ fmtstrings_like_ls.py
Last active
February 5, 2022 10:44
Pretty print list of strings like BSD `ls`
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| import math | |
| import itertools | |
| import shutil | |
| # https://gist.github.com/kkew3/8bb9aa225a6c82ae5e1a0fa609c9a65a | |
| import cjkjust | |
| def calc_layout(n_strings, total_width, column_width, width_between_cols): | |
| # expected_ncols * column_width + |
kkew3
/ rbtree.cpp
Created
December 6, 2021 03:43
The book "Introduction to Algorithms Third Edition" presents red-black tree operations with nodes including parent pointer `.p`. This gist otherwise gives implementation that does not require the parent pointer in C++.
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| #include "rbtree.h" | |
| rbnode *left_rotate(rbnode *x) | |
| { | |
| // assert(x && x->right); | |
| rbnode *y = x->right; | |
| x->right = y->left; | |
| y->left = x; | |
| return y; | |
| } |
kkew3
/ checkvideo.py
Last active
December 15, 2021 02:59
Check whether a video file has been corrupted
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| # original command adapted from https://superuser.com/a/100290 | |
| import subprocess | |
| filename = ... | |
| try: | |
| _ = subprocess.check_call(['ffmpeg', '-v', 'error', '-i', | |
| filename, '-f', 'null', '-']) | |
| except subprocess.CalledProcessError: | |
| # the subprocess call returns non-zero, which means filename |
kkew3
/ extract-cover-art.py
Last active
January 22, 2021 08:08
Extract cover art using [`mid3v2`](https://github.com/quodlibet/mutagen/blob/master/mutagen/_tools/mid3v2.py)
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| #!/usr/bin/env python3 | |
| import os | |
| import sys | |
| import argparse | |
| import subprocess | |
| import ast | |
| HOMEDIR = os.path.normpath(os.environ['HOME']) | |
| MUSICDIR = os.path.join(HOMEDIR, 'Music') | |
| COVERARTDIR = os.path.join(MUSICDIR, '.cover-arts') |
kkew3
/ advindexparser.py
Last active
March 1, 2024 18:11
Parse numpy style advanced array indexing notation from string.
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| import re | |
| SLICE_TEMPLATES = [ | |
| ('s', r'(?P<i>[+-]?\d+)'), | |
| ('sp', r'\((?P<i>[+-]?\d+)\)'), | |
| ('a', r'::?'), | |
| ('ri-', r'(?P<i>[+-]?\d+)::?'), | |
| ('ri-k', r'(?P<i>[+-]?\d+)::(?P<k>[+-]?\d+)'), | |
| ('r-j', r':(?P<j>[+-]?\d+):?'), | |
| ('r-jk', r':(?P<j>[+-]?\d+):(?P<k>[+-]?\d+)'), |
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| #!/bin/bash | |
| # this command list attached volumes; make sure the volume to mount | |
| # is in the list | |
| lsblk | |
| # see if the volume contains file system (skipped if for sure). | |
| # the name of the volume is denoted here as `/dev/xvdf', which | |
| # should be listed in the output of `lsblk'. | |
| # If the output is `/dev/xvdf: data', then it does not have |