Regular expressions pattern options
In regular expressions there are some constructs that influence the way a pattern is matched:
- Non-greedy
? - Non-capturing
(?:pattern) - Positive lookahead
(?=pattern) - Negative lookahead
(?!pattern) - Positive lookbehind
(?<=pattern) - Negative lookbehind
(?<!pattern) - Testing regular expressions
Posted by: Z24 | Sat, Dec 22 2007 |
Category: /programming |
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Tagged as: perl, programming, regex, visual basic
3Com OfficeConnect ADSL Wireless 54 Mbps 11g Firewall Router
This 3Com product has many functions: router, firewall, adsl modem, wireless access point, 4 port switch. 3Com chose to give two names to its products: a name for the market (as the long name in the title), which identifies the purpose of the product and is not changed when a new model replaces the older one, and a model name, a number which identifies the specific model.
The "ADSL" term in the name is particularly useful to specify that it's a adsl modem too, with a RJ-11 port that would connect the router directly to the phone line, through a RJ-11 cable, just like any adsl modem; in fact I found several routers that were capable of routing the adsl signal but were equipped with a RJ-45 port instead of a RJ-11 port: they were not DSL modems and needed to be connected to an external DSL modem. Checking the rear of the product, maybe on the user guide, can help making sure the router is a DSL modem too.
I will review two 3Com OfficeConnect ADSL Wireless 54 Mbps 11g Firewall Router models, the older 3CRWDR100A-72 and the newer 3CRWDR101A-75.
- Introduction
- Pictures
- Installation
- Features
- Reliability and 3Com assistance
- Wireless trouble with 3CRWDR101A-75
- Wireless coverage
- Firewall/router
- Other features
- Missing features
- Troubleshooting
- Conclusion
Posted by: z24 | Sat, Dec 22 2007 |
Category: /hardware |
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Tagged as: dsl, firewall, hardware, password, router, wireless
Posted by: z24 | Sun, Dec 09 2007 |
Category: /hardware |
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Tagged as: google earth, gps, hardware, pda
Running Windows XP in Xen from its own partition
Some months ago I made some experiments with Xen and I succeeded to install and run Windows XP as a guest using Xen 3.0. In that case Windows was located in a single file and was installed through Xen.
My purpose now is to make Xen running an already installed Windows from its own partition. Just to be more specific, this is my machine configuration:
- Ubuntu Dapper Drake 6.06 is located on a SATA disk, set as first boot disk
- Windows XP is located on a EIDE disk, set as second boot disk
- Dual boot is made by grub
Posted by: Z24 | Mon, Dec 03 2007 |
Category: /linux |
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Tagged as: grub, linux, ubuntu, virtualization, windows, xen, xp
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