http://blog.kablamo.org/categories/uncategorized/ Recent content in uncategorized on Kablamo Hugo -- gohugo.io en-us Sun, 26 Nov 2017 00:00:00 +0000 http://blog.kablamo.org/articles/vim-plugin-keybindings/ Sun, 26 Nov 2017 00:00:00 +0000 http://blog.kablamo.org/articles/vim-plugin-keybindings/ I pick up all kinds of vim tricks and plugins but I can never remember all the shortcuts. I wrote up this quick reference to help myself memorize how to use these tools. Caveat: some of these keybindings are unique to my .vimrc. table { margin-top: 0rem; } td { vertical-align : top; padding-left : .5em; padding-right : .5em; background : #999; color : #333; } th { text-align:left; background : #666; color : #ccc; white-space : nowrap; font-weight : normal; padding-left : . http://blog.kablamo.org/articles/cc-processors-3/ Sat, 22 Mar 2014 00:00:00 +0000 http://blog.kablamo.org/articles/cc-processors-3/ I am learning about online credit card processing. Part 1 introduced a number of basic definitions. Part 2 discussed the difference between traditional gateways and the newer full stack gateways. In Part 3, I am exploring some of the new “full stack” gateways which are a bit more developer friendly and listing some key facts about each one. All of these provide a merchant account, gateway, payment processor etc and handle all that complexity for you. http://blog.kablamo.org/articles/cc-processors-2/ Fri, 21 Mar 2014 00:00:00 +0000 http://blog.kablamo.org/articles/cc-processors-2/ I am learning about online credit card processing. Part 1 introduced a number of basic definitions. The number of online payments is going to grow. Only 6% of credit card transactions are currently done online. With so much at stake, there are hundreds of payment gateways who provide a variety of services. But I have chosen to divide them into two categories. First there are traditional gateways who charge a monthly fee (in addition to a variety of other fees) and often you need to obtain a merchant account on your own which also has various fees associated with it. http://blog.kablamo.org/articles/cc-processors-1/ Tue, 18 Mar 2014 00:00:00 +0000 http://blog.kablamo.org/articles/cc-processors-1/ I want to understand credit card processing. So I will probably write a few articles about it. This article has some fundamental definitions. acquiring bank An acquiring bank is a bank which processes card payments on behalf of a merchant. The term ‘acquirer’ indicates the bank accepts (or acquires) credit card payments from card issuing banks within a credit card association. Acquirers take all the risk and bear the burdern of most of the regulation. http://blog.kablamo.org/articles/git-restore/ Sun, 08 Dec 2013 00:00:00 +0000 http://blog.kablamo.org/articles/git-restore/ Don’t be afraid to delete files from your git repository. You can get restore them. You can even search for a string in a deleted file. Here is how to find a deleted file and its commit: git log --diff-filter=D --summary # all deleted files ever git log --diff-filter=D --summary . # all deleted files in cwd git log --diff-filter=D --author=Batman --summary # all files deleted by Batman How to restore a deleted file: http://blog.kablamo.org/articles/tmux-reloaded/ Wed, 27 Nov 2013 00:00:00 +0000 http://blog.kablamo.org/articles/tmux-reloaded/ To reload your tmux configuration without restarting the server, add this to your ~/.tmux.conf file: # reload the config file without restarting the tmux server bind R source-file ~/.tmux.conf \; display-message "Config reloaded" Notice thats a capital R not a lowercase r. I keep forgetting that. http://blog.kablamo.org/articles/tmux-status-updates/ Tue, 26 Nov 2013 00:00:00 +0000 http://blog.kablamo.org/articles/tmux-status-updates/ I use and love OSX growl and Ubuntu notify style desktop notifications. They are gorgeous. But they are also distracting and after a few vibrant and whimsical but fleeting seconds they are gone forever and you have no way to get them back. A more useful (and less glorious) way to receive notifications is in your tmux status bar. tmux is the brilliant successor to the venerable screen which hasn’t been actively developed for quite a while. http://blog.kablamo.org/articles/learning-ruby/ Tue, 19 Nov 2013 00:00:00 +0000 http://blog.kablamo.org/articles/learning-ruby/ I just completed UC Berkeley’s Software as a Service class (via edX.com). I had a great experience and highly recommend it. The class is a tour of all the tools Ruby developers use to create and deploy websites. It assumes you already know how to program at a fairly high level but not necessarily in Ruby. I have no plans to stop writing Perl code (which I love). I just wanted to broaden my horizons, have some fun, and increase my luck surface area. http://blog.kablamo.org/articles/docker/ Wed, 13 Nov 2013 00:00:00 +0000 http://blog.kablamo.org/articles/docker/ I have been in a rabbit hole for the last week. I started looking at Docker. Its a really interesting project that all the hosting providers seem to be moving towards. Its helpful at first to think of Docker as a really fast and small virtual machine. You can put an operating system in a virtual machine, setup all the dependencies and permissions, and then configure and install your app. Its encapsulates your web app and makes it easy to move around. http://blog.kablamo.org/articles/linux_ate_my_ram/ Tue, 12 Nov 2013 00:00:00 +0000 http://blog.kablamo.org/articles/linux_ate_my_ram/ I can never remember how to know how much free memory I have. The Linux kernel claims most of the operating system’s memory. That doesn’t mean the operating system is out of memory. It means the kernel has claimed it and is managing it. The problem is that the Linux kernel defines ‘free’ memory differently than any reasonable user. There are excellent shiny reasons for that, but as a user I don’t really care.