Keyword Search with Firefox

When we want to search from a page, we open the search page and type keywords in the search bar. It is annoying to repeat the process multiple times. Is there faster way to reduce the repeat? Firefox bookmarks comes with a convienent function called keyword search. You can try a built-in keyword search now by typing google keyword in the loc...
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Add Bookmarks with Coherent PDF Tools

Coherent PDF Tools is a command line PDF tool for Windows, Mac and Unix. It is free for non-commercial use. I wanted to remove all bookmarks in the PDF file and re-edit them and Coherent PDF Tools can remove all bookmarks in single command. After some try, it simply worked. Here I introduce how to edit bookmarks with Coherent PDF Tools. Thi...
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Hello JavaScript with Node.js

JavaScript is a popular web language initially implemented on Netscape Navigator and later adapted on virtually all browsers. Since a JavaScript engine is a part of a browser, we had to embed JavaScript file in a HTML page, to load the script from the browser, and to use function like prompt() or alert() to receive from and response to develope...
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Convert TXT to Excel with Perl

If we want to convert comma- or space-seperated text files to Excel ones, we have to open Excel and do manual conversion. Is there automatic way to do batch conversion? Of course, you can do batch conversion without opening Excel with Data::Table::Excel. Data::Table::Excel is a Perl module to convert between Data::Table objects and Excel (xls...
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How to Remove PKG packages on Mac

For GUI mac software, AppCleaner is an easy way to safely and cleanly uninstall it on Mac. However, there is no easy method to uninstall PKG packages on Mac. I have written a small script to uninstall PKG packages on my homebin repo. You can easily download it with curl or wget. $ curl https://raw.githubusercontent.com/cwchen123/homebin/mast...
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