Oct272017
I’ve been using DD-WRT and Tomato firmware on ASUS routers for some years now. Today, I installed the RT-AC3200 and, in the end, it couldn’t have been easier—comparatively speaking. You can find a lot of posts about installing Tomato on ASUS routers because it’s not simple. You can’t simply download an executable and click on it. But this was certainly easier that I’ve ever found it to be.
Jul22017
I just love Regular Expressions. I first came in to contact with them many years ago while doing Perl development. Anyone having to pull data out of text documents or textual input fields must become familiar with Regex as the alternatives of linear token parsing or token searching pale in comparison to the intelligent parsing capability of a regular expression.
PCRE has become a cross-platform/cross-language standard for Regular Expressions supported in whole or part in Perl, PHP, Python, Ruby, C#, Javascript, and Actionscript.
Parses a 10-digit phone number optionally followed by an extension.
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1 |
(?i)^(?:1[-\s]?)?\(?(\d{3})[\)-]?\s?(\d{3})[-\s]?(\d{4})(?:(?:\s?(?:(?:(?:ext\.?)|[x+-])\s?)?)?(\d+))?$ |
Expanded and documented:
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(?ix) # case-insensitive, permit whitespace and comments ^ # Start of input (?:1 # optional "1" Prefix [-\s]? # followed by optional dash or space )? # End of 1 Prefix \(? # optional left paren (\d{3}) # Group 1 - 3-digit Area Code [\)-]? # optional right paren or dash \s? # optional space (\d{3}) # Group 2 - 3-digit Prefix [-\s]? # optional dash or space (\d{4}) # Group 3 - 4-digit Suffix (?: # optional Extension (?: # optional Extension separator \s? # optional space (?: # optional delimiter (?:(?:ext\.?)|[x+-]) # "ext", "ext.", "x", plus or dash \s? # followed by optional space )? # End of delimiter )? # End of Extension separator (\d+) # group 4 - Extension )? # End of Extension $ # End of input |
These values will all be parsed successfully. Group captures are marked in red (1), green (2), blue (3), and orange (4):
Parses City, State, and Zip Code.
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1 |
^\s*(.+?)[,\s]\s*(AL|AK|AZ|AR|CA|CO|CT|DC|DE|FL|GA|HI|ID|IL|IN|IA|KS|KY|LA|ME|MD|MA|MI|MN|MS|MO|MT|NE|NV|NH|NJ|NM|NY|NC|ND|OH|OK|OR|PA|RI|SC|SD|TN|TX|UT|VT|VA|WA|WV|WI|WY)[,\s]\s*(\d{5}(?:-\d{4})?)(?:[,\s]\s*(.+?)\s*)?$ |
Expanded and documented:
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(?ix) # case-insensitive, permit whitespace and comments ^ # Start of input \s* # optional whitespace (.+?) # Group 1 - City Name [,\s] # required comma or whitespace \s* # optional whitespace # Group 2 - US State Acronym (AL|AK|AZ|AR|CA|CO|CT|DC|DE|FL|GA|HI|ID|IL|IN|IA|KS|KY|LA|ME|MD|MA|MI|MN|MS|MO| MT|NE|NV|NH|NJ|NM|NY|NC|ND|OH|OK|OR|PA|RI|SC|SD|TN|TX|UT|VT|VA|WA|WV|WI|WY) [,\s] # required comma or whitespace \s* # optional whitespace (\d{5} # Group 3 - Zip Code (?: # optional Zip+4 extension - # required dash \d{4} # required 4 digits )? # End of Zip+4 extension ) # End of Zip Code (?: # optional trailing text [,\s] # required comma or whitespace \s* # optional whitespace (.+?) # Group 4 - Trailing Text \s* # optional whitespace )? # End of trailing text $ # End of input |
These values will all be parsed successfully. Group captures are marked in red (1), green (2), blue (3), and orange (4):