- Identify the use cases that are in scope
- Determine constraints based on scoped use cases
use case : the things your system needs to be do.
constraints : the things your system will have to consider to be able to do stuff
Brandon Courtney bcourtney5965
bcourtney5965
/ system-design-cheatsheet.md
Created
November 11, 2016 20:16
— forked from banunatina/system-design-cheatsheet.md
bcourtney5965
/ The Technical Interview Cheat Sheet.md
Created
June 8, 2016 02:40
— forked from tsiege/The Technical Interview Cheat Sheet.md
This is my technical interview cheat sheet. Feel free to fork it or do whatever you want with it. PLEASE let me know if there are any errors or if anything crucial is missing. I will add more links soon.
This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.
###Array ####Definition:
- Stores data elements based on an sequential, most commonly 0 based, index.
- Based on tuples from set theory.
bcourtney5965
/ Continuation of rails installation trouble
Created
March 31, 2014 17:38
I am getting this after having installed XCode, and Homebrew
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| Last login: Mon Mar 31 10:14:53 on ttys000 | |
| brandontneysmbp:~ brandoncourtney$ | |
| brandontneysmbp:~ brandoncourtney$ sudo gem install rails | |
| Password: | |
| Building native extensions. This could take a while... | |
| ERROR: Error installing rails: | |
| ERROR: Failed to build gem native extension. | |
| /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb | |
| checking for libkern/OSAtomic.h... yes |
bcourtney5965
/ Python != Ruby
Created
March 29, 2014 06:45
Is my previously installed Python affecting Ruby in my terminal?
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| Last login: Fri Mar 28 23:10:47 on ttys000 | |
| Brandon-Courtneys-MacBook-Pro:~ brandoncourtney$ ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)" | |
| ==> This script will install: | |
| /usr/local/bin/brew | |
| /usr/local/Library/... | |
| /usr/local/share/man/man1/brew.1 | |
| ==> The following directories will be made group writable: | |
| /usr/local/. | |
| /usr/local/bin | |
| ==> The following directories will have their group set to admin: |
bcourtney5965
/ Rails installation difficulties, post XCode install
Created
March 29, 2014 06:20
Rails installation difficulties, post XCode install
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| Last login: Fri Mar 28 22:56:53 on ttys000 | |
| Brandon-Courtneys-MacBook-Pro:~ brandoncourtney$ | |
| Brandon-Courtneys-MacBook-Pro:~ brandoncourtney$ rails new myproject | |
| Rails is not currently installed on this system. To get the latest version, simply type: | |
| $ sudo gem install rails | |
| You can then rerun your "rails" command. | |
| Brandon-Courtneys-MacBook-Pro:~ brandoncourtney$ sudo gem install rails | |
| Password: |
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| Last login: Fri Mar 28 17:18:26 on console | |
| Brandon-Courtneys-MacBook-Pro:~ brandoncourtney$ sudo gem install rails | |
| Password: | |
| Sorry, try again. | |
| Password: | |
| Building native extensions. This could take a while... | |
| ERROR: Error installing rails: | |
| ERROR: Failed to build gem native extension. | |
| /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb |
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| Last login: Fri Mar 28 16:18:23 on ttys000 | |
| Brandon-Courtneys-MacBook-Pro:~ brandoncourtney$ | |
| Brandon-Courtneys-MacBook-Pro:~ brandoncourtney$ ls | |
| Desktop Library Sites | |
| Documents Movies ganttproject.log | |
| Downloads Music intro_rails | |
| Dropbox Pictures java0.log | |
| Google Drive Public temp | |
| Brandon-Courtneys-MacBook-Pro:~ brandoncourtney$ cd intro_rails | |
| Brandon-Courtneys-MacBook-Pro:intro_rails brandoncourtney$ gem install rails |
bcourtney5965
/ Terminal - Rails import - Error Message
Created
March 27, 2014 04:33
Can't import Rails in Terminal, gives error message
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| Last login: Wed Mar 26 20:45:26 on ttys000 | |
| Brandon-Courtneys-MacBook-Pro:~ brandoncourtney$ | |
| Brandon-Courtneys-MacBook-Pro:~ brandoncourtney$ ls | |
| Desktop Library Sites | |
| Documents Movies ganttproject.log | |
| Downloads Music intro_rails | |
| Dropbox Pictures java0.log | |
| Google Drive Public temp | |
| Brandon-Courtneys-MacBook-Pro:~ brandoncourtney$ cd intro_rails | |
| Brandon-Courtneys-MacBook-Pro:intro_rails brandoncourtney$ rails new myproject |