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What is a reasonable code coverage % for unit tests (and why)? [closed]

...swers precisely that question (in a nicely entertaining manner at that!): http://www.artima.com/forums/flat.jsp?forum=106&thread=204677 Testivus On Test Coverage Early one morning, a programmer asked the great master: “I am ready to write some unit tests. What code coverage sh...
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Is there a way to access the “previous row” value in a SELECT statement?

I need to calculate the difference of a column between two lines of a table. Is there any way I can do this directly in SQL? I'm using Microsoft SQL Server 2008. ...
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Releasing memory in Python

...ial python-dev lm-sensors sudo pip install psutil logutils bottle batinfo https://bitbucket.org/gleb_zhulik/py3sensors/get/tip.tar.gz zeroconf netifaces pymdstat influxdb elasticsearch potsdb statsd pystache docker-py pysnmp pika py-cpuinfo bernhard sudo pip install glances Then run it in the ter...
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What is the difference between JOIN and UNION?

What is the difference between JOIN and UNION ? Can I have an example? 15 Answers 1...
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If my interface must return Task what is the best way to have a no-operation implementation?

In the code below, due to the interface, the class LazyBar must return a task from its method (and for argument's sake can't be changed). If LazyBar s implementation is unusual in that it happens to run quickly and synchronously - what is the best way to return a No-Operation task from the method...
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Globally override key binding in Emacs

How can I set a key binding that globally overrides and takes precedence over all other bindings for that key? I want to override all major/minor mode maps and make sure my binding is always in effect. ...
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How to convert string representation of list to a list?

I was wondering what the simplest way is to convert a string list like the following to a list : 15 Answers ...
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How to change identity column values programmatically?

I have a MS SQL 2005 database with a table Test with column ID . ID is an identity column. 13 Answers ...
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How do I parse a string to a float or int?

In Python, how can I parse a numeric string like "545.2222" to its corresponding float value, 545.2222 ? Or parse the string "31" to an integer, 31 ? ...
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Is there any way to prevent input type=“number” getting negative values?

I want to get only positive values, is there any way to prevent it using only html Please don't suggest validation method ...