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Checking network connection
...efore we try with Python, let's test connectivity using an external tool, Netcat:
$ nc 8.8.8.8 53 -zv
Connection to 8.8.8.8 53 port [tcp/domain] succeeded!
Netcat confirms that we can reach 8.8.8.8 over 53/tcp. Now we can set up a socket connection to 8.8.8.8:53/tcp in Python to check connection:
i...
SQL WHERE.. IN clause multiple columns
...e time without issue. Unless you are using an older optimizer (6.5, 7, 8, etc) it shouldn't have a problem with this syntax.
– mrdenny
Jul 16 '09 at 8:09
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Easiest way to detect Internet connection on iOS?
...ample on how to determine host reachability, reachability by WiFi, by WWAN etc. For a very simply check of network reachability, you can do something like this
Reachability *networkReachability = [Reachability reachabilityForInternetConnection];
NetworkStatus networkStatus = [networkReachabilit...
Observer Design Pattern vs “Listeners”
...of log messages (e.g. write to console, write to file, write to event log, etc.) In terms of patterns, while the overall .Net trace functionality employs several patterns (Plugin, Iterator), looping over a collection of objects which all conform to the same interface is really just plane jane polym...
Convert JSON string to dict using Python
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Datatable vs Dataset
...ff some internal behavior within the DataTable, such as index maintenance, etc. See this article for further details.
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pass post data with window.location.href
...any sensitive / personal data (i.e names, addresses, emails addresses, DOB etc) in either of these.
Session Storage is a more secure option for anything sensitive, it's only accessible to the origin that set the items and also clears as soon as the browser / tab is closed.
IndexDB is a littl...
How to break out of a loop from inside a switch?
...disadvantage that most developers first have to look at it for a minute in order to understand how/whether this works. :(
– sbi
Sep 15 '09 at 12:27
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Difference between .tagName and .nodeName
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There are several other types of nodes as well (comment, attribute, text, etc.). To get the name of any of the various node types, you can use the nodeName property.
When using nodeName against an element node, you'll get its tag name, so either could really be used, though you'll get better consi...
Mercurial for Beginners: The Definitive Practical Guide
...f you have a bunch of files like deploy-test.conf, deploy-production.conf, etc and don't want to version them (they might have passwords in them) but you do want to version deploy-template.conf you can just ignore deploy* and manually add deploy-templace.conf.
– Steve Losh
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