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The Hard-Core Coder

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The Hard-Core Coder

Tag Archives: greater-than

Counting From Zero

08 Monday Aug 2016

Posted by Wyrd Smythe in CS101

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Tags

Edsger Dijkstra, EWD831, greater-than, indexing, integer ranges, less-than, zero, zero indexing

In his brief 1982 essay (EWD831), computer science giant Edsger Dijkstra examines a topic that (inappropriately, as it turns out) vexes some programmers: Why in the world do computer people count starting at zero? Everyone knows that counting starts at one!

As it turns out, there are two very good reasons for counting from zero!

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Always Use Less-Than

05 Wednesday Mar 2014

Posted by Wyrd Smythe in CS101, Opinion

≈ 4 Comments

Tags

code clarity, computer programming, greater-than, less-than, readable code

Here’s a simple tip! I can’t begin to count how many potential code bugs this has eliminated. It takes some getting used to but once you make it automatic it’s a real help in keeping code and your thinking correct.

The tip is this: when you write relational expressions, always use less-than, never use greater-than. (Less-than-or-equal is okay, too.)

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