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Is it secure to store passwords as environment variables (rather than as plain text) in config files

I work on a few apps in rails, django (and a little bit of php), and one of the things that I started doing in some of them is storing database and other passwords as environment variables rather than plain text in certain config files (or in settings.py, for django apps). ...
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Check if a program exists from a Makefile

... Sometimes you need a Makefile to be able to run on different target OS's and you want the build to fail early if a required executable is not in PATH rather than to run for a possibly long time before failing. The excellent solution provided by engineerchuan requires making a target. However, if ...
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How do I convert a decimal to an int in C#?

... -1 since this will not work for values such as decimal.MaxValue and decimal.MinValue and results in an OverflowException. I believe that @Will provides a better answer here stackoverflow.com/a/501165/39532 – mezoid Jun 2 '14 at 6:50 ...
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MD5 algorithm in Objective-C

... md5 is available on the iPhone and can be added as an addition for ie NSString and NSData like below. MyAdditions.h @interface NSString (MyAdditions) - (NSString *)md5; @end @interface NSData (MyAdditions) - (NSString*)md5; @end MyAdditions.m #import...
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How do I output an ISO 8601 formatted string in JavaScript?

... best solution I've come across is to use the Moment.js javascript library and use the following code: To get the current ISO time with timezone information and milliseconds now = moment().format("YYYY-MM-DDTHH:mm:ss.SSSZZ") // "2013-03-08T20:11:11.234+0100" now = moment().utc().format("YYYY-MM-D...
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How can foreign key constraints be temporarily disabled using T-SQL?

Are disabling and enabling foreign key constraints supported in SQL Server? Or is my only option to drop and then re-create the constraints? ...
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How to use the toString method in Java?

...of the toString() method, defined in the Object class? How is it used, and what is its purpose? 13 Answers ...
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Memcache(d) vs. Varnish for speeding up 3 tier web architecture

I'm trying to speed up my benchmark (3 tier web architecture), and I have some general questions related to Memcache(d) and Varnish. ...
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Changing the “tick frequency” on x or y axis in matplotlib?

...np.arange was used rather than Python's range function just in case min(x) and max(x) are floats instead of ints.) The plt.plot (or ax.plot) function will automatically set default x and y limits. If you wish to keep those limits, and just change the stepsize of the tick marks, then you could us...
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Why can't the C# constructor infer type?

... could identify all types called Foo in scope regardless of generic arity, and then do overload resolution on each using a modified method type inference algorithm. We'd then have to create a 'betterness' algorithm that determines which of two applicable constructors in two types that have the same ...