Click Technology

Linux, Windows, Macs – it's all good!

Which version of Linux am I running?

June15

How many times have I tried to find out _exactly_ which version of Linux I’m running when installing something?  I either get the kernel version (no good for adding debs etc) when I want to find out what the Debian underlying codename is and so on. Here then is the solution. All of it.


uname -a && cat /etc/*release
posted under Linux Tips | Comments Off on Which version of Linux am I running?

Happy Ed Balls day

April28


Happy Ed Balls day

posted under Linux Tips | Comments Off on Happy Ed Balls day

UK postcode regular expressions

March17

I found these two regexps expressions for UK postcodes today. The first is check if the number and letter sequence is correct. I’ve modified it slightly to look for one or two spaces between the groups of letters and numbers. Worked pretty well under PCRE. Noice. The second regex is to validate the postcode in its entirety. It worked for all the postcodes I had, but this is a constantly changing situation.

Just the basics – format is valid?

Here it is and requires the g(lobal) switch.


([A-Z]{1,2}[0-9][0-9A-Z]?\s{1,2}?[0-9][A-Z]{2})

Sample data…


BA2 3BH
UB11 1FW
CR0 4ZS
This is a B73 6AZ postcode
SW1E 5JD
LS1 2JZ
W1W 8AG
WF16 0HL
London too, EC2A 2BB, nice.
RG21 4EA
BA15 1AJ
CB4 0FW
EC4M 9HH
AB10 1XL
EH2 2BY
EC4M 9HH
EH2 2BY

And a PHP snippet of the above..


    $re = "/([A-Z]{1,2}[0-9][0-9A-Z]?\\s{1,2}?[0-9][A-Z]{2})/"; 
    $str = "BA2 3BH\nUB11 1FW\nCR0 4ZS\nThis is a B73 6AZ postcode\nSW1E 5JD\nLS1 2JZ\nW1W 8AG\nWF16 0HL\nLondon too, EC2A 2BB, nice.\nRG21 4EA\nBA15 1AJ\nCB4 0FW\nEC4M 9HH\nAB10 1XL\nEH2 2BY\nEC4M 9HH\nEH2 2BY"; 
     
    preg_match_all($re, $str, $matches);

Full Monty – Postcode itself is valid?

This regexp should be able to validate most postcodes. Worked well on all the data I had.


^GIR[ ]?0AA|((AB|AL|B|BA|BB|BD|BH|BL|BN|BR|BS|BT|BX|CA|CB|CF|CH|CM|CO|CR|CT|CV|CW|DA|DD|DE|DG|DH|DL|DN|DT|DY|E|EC|EH|EN|EX|FK|FY|G|GL|GY|GU|HA|HD|HG|HP|HR|HS|HU|HX|IG|IM|IP|IV|JE|KA|KT|KW|KY|L|LA|LD|LE|LL|LN|LS|LU|M|ME|MK|ML|N|NE|NG|NN|NP|NR|NW|OL|OX|PA|PE|PH|PL|PO|PR|RG|RH|RM|S|SA|SE|SG|SK|SL|SM|SN|SO|SP|SR|SS|ST|SW|SY|TA|TD|TF|TN|TQ|TR|TS|TW|UB|W|WA|WC|WD|WF|WN|WR|WS|WV|YO|ZE)(\d[\dA-Z]?[ ]?\d[ABD-HJLN-UW-Z]{2}))|BFPO[ ]?\d{1,4}$

And here then is the code snipped in Python, the most flexible scripting language there is. By far.


    import re
    p = re.compile(ur'^GIR[ ]?0AA|((AB|AL|B|BA|BB|BD|BH|BL|BN|BR|BS|BT|BX|CA|CB|CF|CH|CM|CO|CR|CT|CV|CW|DA|DD|DE|DG|DH|DL|DN|DT|DY|E|EC|EH|EN|EX|FK|FY|G|GL|GY|GU|HA|HD|HG|HP|HR|HS|HU|HX|IG|IM|IP|IV|JE|KA|KT|KW|KY|L|LA|LD|LE|LL|LN|LS|LU|M|ME|MK|ML|N|NE|NG|NN|NP|NR|NW|OL|OX|PA|PE|PH|PL|PO|PR|RG|RH|RM|S|SA|SE|SG|SK|SL|SM|SN|SO|SP|SR|SS|ST|SW|SY|TA|TD|TF|TN|TQ|TR|TS|TW|UB|W|WA|WC|WD|WF|WN|WR|WS|WV|YO|ZE)(\d[\dA-Z]?[ ]?\d[ABD-HJLN-UW-Z]{2}))|BFPO[ ]?\d{1,4}$')
    test_str = u"BA2 3BH\nUB11 1FW\nCR0 4ZS\nB73 6AZ\nSW1E 5JD\nLS1 2JZ\nW1W 8AG\nWF16 0HL\nEC2A 2BB\nRG21 4EA\nBA15 1AJ\nCB4 0FW\nEC4M 9HH\nAB10 1XL\nEH2 2BY\nEC4M 9HH\nEC4M 9HH\nEC4M 9HH\nEH2 2BY\nEH3 7NS\nEH3 7NS\nCB22 3AT\nGU2 7AH\nEC1M 6EH\nRG10 9NN\nSL4 1BE\nKT10 9AD\nW1W 8DH\nBA1 5BB\nTN4 8BS\nCF10 2EH\nCW7 3RT\nW1U 6HP\nEC2N 2AN\nW1W 7PA\nEC3A 7NH\nGU6 8TB\nB60 4JE\nW1S 2LG\nG2 7JS\nRH6 0PA\nWF5 0AN\nHA1 1BQ\nEC2R 7AF\nEC2R 7AF\nEC2R 7AF\nEC2R 7AF\nRG1 1AX\nWC2R 1DJ\nW1J 0DW\n"
     
    re.findall(p, test_str)

By the way, some awesome regex testing websites are…

posted under Linux Tips | Comments Off on UK postcode regular expressions

IT summarized

March16

I sometimes feel like information technology is just exactly like this.

View post on imgur.com

There’s loads of great (open source) software out there but connecting it together to streamline it and thence make it really effective is the killer.

posted under General | Comments Off on IT summarized
« Older Entries