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Is it safe to ignore the possibility of SHA collisions in practice?

Let's say we have a billion unique images, one m>mem>gabyte each. We calculate the SHA-256 hash for the contents of each file. The possibility of collision depends on: ...
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Using getopts to process long and short command line options

I wish to have long and short forms of command line options invoked using my shell script. 32 Answers ...
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When to use an object instance variable versus passing an argum>mem>nt to the m>mem>thod

How do you decide between passing argum>mem>nts to a m>mem>thod versus simply declaring them as object instance variables that are visible to all of the object's m>mem>thods? ...
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Interface or an Abstract Class: which one to use?

...ant to force developers working in your system (yourself included) to implem>mem>nt a set number of m>mem>thods on the classes they'll be building. Use an abstract class when you want to force developers working in your system (yourself included) to implem>mem>nt a set numbers of m>mem>thods and you want to provid...
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How many socket connections can a web server handle?

Say if I was to get shared, virtual or dedicated hosting, I read som>mem>where a server/machine can only handle 64,000 TCP connections at one tim>mem>, is this true? How many could any type of hosting handle regardless of bandwidth? I'm assuming HTTP works over TCP. ...
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Valid values for android:fontFamily and what they map to?

In the answer to this question the user lists values for android:fontFamily and 12 variants (see below). Where do these values com>mem> from? The docum>mem>ntation for android:fontFamily does not list this information in any place (I checked here , and here ). The strings are listed in the Android ...
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Difference between this and self in JavaScript

...is window because JavaScript lets you access any property x of window as simply x, instead of window.x. Therefore, self is really window.self, which is different to this. window.self === window; // true If you're using a function that is executed in the global scope and is not in strict mode, thi...
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MySQL stored procedure vs function, which would I use when?

I'm looking at MySQL stored procedures and function. What is the real difference? 5 Answers ...
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What is context in _.each(list, iterator, [context])?

I am new to underscore.js. What is the purpose of [context] in _.each() ? How should it be used? 5 Answers ...
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multiprocessing.Pool: When to use apply, apply_async or map?

I have not seen clear examples with use-cases for Pool.apply , Pool.apply_async and Pool.map . I am mainly using Pool.map ; what are the advantages of others? ...