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John Ho ohjho

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@ohjho
ohjho / GmailThis.js
Created April 13, 2018 03:30
Gmail This Bookmarklet (https://www.lifewire.com/how-to-add-a-gmail-this-bookmarklet-to-your-browser-1172047)
javascript:(function(){popw='';Q='';d=document;w=window;if(d.selection){Q=d.selection.createRange().text;}else if(w.getSelection){Q=w.getSelection();}else if(d.getSelection){Q=d.getSelection();}popw=w.open('http://mail.google.com/mail/s?view=cm&fs=1&tf=1&to=&su='+encodeURIComponent(d.title)+'&body='+encodeURIComponent(Q)+escape('%5Cn%5Cn')+encodeURIComponent(d.location)+'&zx=RANDOMCRAP&shva=1&disablechatbrowsercheck=1&ui=1','gmailForm','scrollbars=yes,width=680,height=575,top=175,left=75,status=no,resizable=yes');if(!d.all)setTimeout(function(){popw.focus();},50);})();
@ohjho
ohjho / remove_ipynb_checkpoints.sh
Last active October 16, 2023 18:49
How to remove .ipynb_checkpoints from Git Repo
# to remove the file on git without deleting from local
# use -> git rm --cached
find . -name .ipynb_checkpoints -print0 | xargs -0 git rm -r --ignore-unmatch
echo .ipynb_checkpoints >> .gitignore
@ohjho
ohjho / git_blob_obj.sh
Last active December 11, 2018 07:10
shell script to show all blob objects in your git repo sorted from smallest to largest. For mac users, please comment out the last line. To run, place this in your git directory and run `sh git_blob_obj.sh`
git rev-list --objects --all \
| git cat-file --batch-check='%(objecttype) %(objectname) %(objectsize) %(rest)' \
| sed -n 's/^blob //p' \
| sort --numeric-sort --key=2 \
| cut -c 1-12,41- \
| $(command -v gnumfmt || echo numfmt) --field=2 --to=iec-i --suffix=B --padding=7 --round=nearest
@ohjho
ohjho / imaginemagick_color_convert.sh
Last active March 6, 2019 04:29
-fill is the new color and -opaque is the old color; you can use https://imagecolorpicker.com/ to identify the color in the image
convert original.jpg -fuzz 15% -fill "#84BE6A" -opaque "#d89060" new.jpg
@ohjho
ohjho / imaginemagick_crop.sh
Created March 29, 2019 00:52
how to crop an image with imaginemagick: -crop {w}x{h}+{x}+{y}
convert foo.png -crop 640x480+50+100 out.png
@ohjho
ohjho / imgmagick_batch_resize
Created April 23, 2019 02:50
imgmagick resize batch sub directory (replace . with your dir path)
find . -type f -iname "*.jpg" -exec identify -format '%w %h %i\n' {} \; |
awk '$1 > 1200 || $2 > 1200 {sub(/^[^ ]* [^ ]* /, ""); print}' |
tr '\n' '\0' |
xargs -0 mogrify -resize '1200x1200'
@ohjho
ohjho / grep_string_in_dir.sh
Last active October 15, 2019 03:32
use grep to search for files containing a given string
grep -R --exclude-dir=node_modules 'some pattern' /path/to/search
grep -R --exclude-dir={node_modules,.git} 'some pattern' /path/to/search
@ohjho
ohjho / ffmpeg_cheatsheet.md
Last active June 12, 2024 19:22
@ohjho
ohjho / bash_cheatsheet.md
Last active January 19, 2024 22:31
text file handling edition

Find Differences in two Text Files

grep -Fxvf file1 file2

Flags mean:

-F, --fixed-strings
              Interpret PATTERN as a list of fixed strings, separated by newlines, any of which is to be matched.    
-x, --line-regexp
@ohjho
ohjho / Python+VirtualEnvs.md
Last active June 24, 2024 23:15
Python Versions + Virtual Environments Tips and Tricks