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Michael Pratt mpratt

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@gruber
gruber / Liberal Regex Pattern for All URLs
Last active May 6, 2024 21:38
Liberal, Accurate Regex Pattern for Matching All URLs
The regex patterns in this gist are intended to match any URLs,
including "mailto:foo@example.com", "x-whatever://foo", etc. For a
pattern that attempts only to match web URLs (http, https), see:
https://gist.github.com/gruber/8891611
# Single-line version of pattern:
(?i)\b((?:[a-z][\w-]+:(?:/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?«»“”‘’]))
@jboner
jboner / latency.txt
Last active May 6, 2024 07:06
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
@nikic
nikic / password_hashing_api.md
Created September 12, 2012 15:04
The new Secure Password Hashing API in PHP 5.5

The new Secure Password Hashing API in PHP 5.5

The [RFC for a new simple to use password hashing API][rfc] has just been accepted for PHP 5.5. As the RFC itself is rather technical and most of the sample codes are something you should not use, I want to give a very quick overview of the new API:

Why do we need a new API?

Everybody knows that you should be hashing their passwords using bcrypt, but still a surprising number of developers uses insecure md5 or sha1 hashes (just look at the recent password leaks). One of the reasons for this is that the crypt() API is ridiculously hard to use and very prone to programming mistakes.

@bishboria
bishboria / springer-free-maths-books.md
Last active April 25, 2024 06:27
Springer made a bunch of books available for free, these were the direct links
@gruber
gruber / Liberal Regex Pattern for Web URLs
Last active April 22, 2024 19:02
Liberal, Accurate Regex Pattern for Matching Web URLs
The regex patterns in this gist are intended only to match web URLs -- http,
https, and naked domains like "example.com". For a pattern that attempts to
match all URLs, regardless of protocol, see: https://gist.github.com/gruber/249502
# Single-line version:
(?i)\b((?:https?:(?:/{1,3}|[a-z0-9%])|[a-z0-9.\-]+[.](?:com|net|org|edu|gov|mil|aero|asia|biz|cat|coop|info|int|jobs|mobi|museum|name|post|pro|tel|travel|xxx|ac|ad|ae|af|ag|ai|al|am|an|ao|aq|ar|as|at|au|aw|ax|az|ba|bb|bd|be|bf|bg|bh|bi|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|cr|cs|cu|cv|cx|cy|cz|dd|de|dj|dk|dm|do|dz|ec|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gg|gh|gi|gl|gm|gn|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|im|in|io|iq|ir|is|it|je|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|me|mg|mh|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|mv|mw|mx|my|mz|na|nc|ne|nf|ng|ni|nl|no|np|nr|nu|nz|om|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|ps|pt|pw|py|qa|re|ro|rs|ru|rw|sa|sb|sc|sd|se|sg|sh|si|s
@nikic
nikic / objects_arrays.md
Last active April 12, 2024 17:05
Post explaining why objects often use less memory than arrays (in PHP)

Why objects (usually) use less memory than arrays in PHP

This is just a small post in response to [this tweet][tweet] by Julien Pauli (who by the way is the release manager for PHP 5.5). In the tweet he claims that objects use more memory than arrays in PHP. Even though it can be like that, it's not true in most cases. (Note: This only applies to PHP 5.4 or newer.)

The reason why it's easy to assume that objects are larger than arrays is because objects can be seen as an array of properties and a bit of additional information (like the class it belongs to). And as array + additional info > array it obviously follows that objects are larger. The thing is that in most cases PHP can optimize the array part of it away. So how does that work?

The key here is that objects usually have a predefined set of keys, whereas arrays don't:




  


  




    


          
    

      

        
        

          

              @jbenet
          

          

            
                jbenet
                / simple-git-branching-model.md
            
            

              Last active
              April 9, 2024 03:31
            

              
                a simple git branching model
              
          

        

      

        

  

      

    
a simple git branching model (written in 2013)


This is a very simple git workflow. It (and variants) is in use by many people.
I settled on it after using it very effectively at Athena.
GitHub does something similar; Zach Holman mentioned  it
in this talk.


Update: Woah, thanks for all the attention. Didn't expect this simple rant
to get popular.



  


  




    


          
    

      

        
        

          

              @jonathantneal
          

          

            
                jonathantneal
                / README.md
            
            

              Last active
              March 19, 2024 23:31
            

              
                Local SSL websites on macOS Sierra
              
          

        

      

        

  

      

    
Local SSL websites on macOS Sierra


These instructions will guide you through the process of setting up local, trusted websites on your own computer.


These instructions are intended to be used on macOS Sierra, but they have been known to work in El Capitan, Yosemite, Mavericks, and Mountain Lion.


NOTE: You may substitute the edit command for nano, vim, or whatever the editor of your choice is. Personally, I forward the edit command to Sublime Text:


alias edit="/Applications/Sublime\ Text.app/Contents/SharedSupport/bin/subl"



  


  




    


          
    

      

        
        

          

              @sgmurphy
          

          

            
                sgmurphy
                / url_slug.js
            
            

              Created
              July 12, 2012 02:05
            

              
                URL Slugs in Javascript (with UTF-8 and Transliteration Support)
              
          

        

      

        

  

    
    


        



  


  

        

          
          /**
        

        

          
           * Create a web friendly URL slug from a string.
        

        

          
           *
        

        

          
           * Requires XRegExp (http://xregexp.com) with unicode add-ons for UTF-8 support.
        

        

          
           *
        

        

          
           * Although supported, transliteration is discouraged because
        

        

          
           *     1) most web browsers support UTF-8 characters in URLs
        

        

          
           *     2) transliteration causes a loss of information
        

        

          
           *
        

        

          
           * @author Sean Murphy <sean@iamseanmurphy.com>
        

  





    


  




    


          
    

      

        
        

          

              @jbroadway
          

          

            
                jbroadway
                / Slimdown.md
            
            

              Last active
              February 5, 2024 10:43
            

              
                Slimdown - A simple regex-based Markdown parser.