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Why should eval be avoided in Bash, and what should I use instead?

Time and time again, I see Bash answers on Stack Overflow using eval and the answers get bashed, pun intended, for the use of such an "evil" construct. Why is eval so evil? ...
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What is a Python egg?

I'm new to Python and am just trying to understand how its packages work. Presumably "eggs" are some sort of packaging mechanism, but what would be a quick overview of what role they play and may be some information on why they're useful and how to create them? ...
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Sending email through Gmail SMTP server with C#

... CVertex, make sure to review your code, and, if that doesn't reveal anything, post it. I was just enabling this on a test ASP.NET site I was working on, and it works. Actually, at some point I had an issue on my code. I didn't spot it until I had a simpler versio...
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What is the difference between a JavaBean and a POJO?

I'm not sure about the difference. I'm using Hibernate and, in some books, they use JavaBean and POJO as an interchangeable term. I want to know if there is a difference, not just in the Hibernate context, but as general concepts. ...
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What's the difference between faking, mocking, and stubbing?

...t I'm wondering if there are accepted definitions for faking , mocking , and stubbing for unit tests? How do you define these for your tests? Describe situations where you might use each. ...
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What are the differences among grep, awk & sed? [duplicate]

...ic question, but I am confused about the differences between grep , awk and sed in terms of their role in Unix/Linux system administration and text processing. ...
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What is the difference between single-quoted and double-quoted strings in PHP?

...le confused why I see some code in PHP with string placed in single quotes and sometimes in double quotes. 12 Answers ...
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Will the Garbage Collector call IDisposable.Dispose for me?

The .NET IDisposable Pattern implies that if you write a finalizer, and implement IDisposable, that your finalizer needs to explicitly call Dispose. This is logical, and is what I've always done in the rare situations where a finalizer is warranted. ...
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S3 Static Website Hosting Route All Paths to Index.html

...t resolve to anything. What I need is the ability to take all url requests and serve up the root index.html in my S3 bucket, rather than just doing a full redirect. Then my javascript application could parse the URL and serve the proper page. ...
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Can a constructor in Java be private?

...of delegating constructors, the following class allows you to save a value and a type, but it only lets you do it for a subset of types, so making the general constructor private is needed to ensure that only the permitted types are used. The common private constructor helps code reuse. public clas...