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    <ul> <li>Easy to add/remove functions (or new operations)</li> </ul> <p>Definitely - it's also easy to see where does the context for an operation start/finish. It's much easier to see that way than by some arbitrary range of lines in the source.</p> <ul> <li>Readability of the code</li> </ul> <p>You can overdo it. There are cases where having a function or not having it does not make a difference in linecount, but does in readability - and it depends on a person whether it's positive or not.</p> <p>For example, if you did lots of set-bit operations, would you make:</p> <pre><code>some_variable = some_variable | (1 &lt;&lt; bit_position) </code></pre> <p>a function? Would it help?</p> <ul> <li>Source efficiency(?) due to the variables in the functions being destroyed (unless dynamic allocation is done)</li> </ul> <p>If the source is reasonable (as in, you're not reusing variable names past their real context), then it shouldn't matter. Compiler should know exactly where the value usage stops and where it can be ignored / destroyed.</p> <ul> <li>Would the nested function slow the code flow?</li> </ul> <p>In some cases where address aliasing cannot be properly determined it could. But it shouldn't matter in practice in most programs. By the time it starts to matter, you're probably going to be going through your application with a profiler and spotting problematic hotspots anyway.</p> <p>Compilers are quite good these days at inlining functions though. You can trust them to do at least a decent job at getting rid of all cases where calling overhead is comparable to function length itself. (and many other cases)</p>
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    1. POIs it good to use functions as much as possible?
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    1. USBenjamin Leinweber
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    1. COAdding to your remark about profiling: that gets a great deal easier too when the program is properly broken up into functions.
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      1. USFred Foo
    2. COIt also makes unit testing possible/easier, and validating your code easier in general, when you have small functions that perform discrete tasks. Validating that one small function does one thing right is easier and more reliable than validating that one large function does 200 things right.
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      1. USPaul Griffiths
    3. COShouldn't that be `some_variable |= 1 << bit_position;`?
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      1. USJonathan Leffler
 

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