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What is the difference between bottom-up and top-down?

...would call fib(100)=fib(99)+fib(98), which would call fib(99)=fib(98)+fib(97), ...etc..., which would call fib(2)=fib(1)+fib(0)=1+0=1. Then it would finally resolve fib(3)=fib(2)+fib(1), but it doesn't need to recalculate fib(2), because we cached it. This starts at the top of the tree and evaluates...
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How to tell if a string is not defined in a Bash shell script

... answered Oct 23 '08 at 17:19 Jonathan LefflerJonathan Leffler 641k111111 gold badges777777 silver badges11481148 bronze badges ...
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How to handle invalid SSL certificates with Apache HttpClient? [duplicate]

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Why do I need to explicitly push a new branch?

...f it has a similarly named remote tracking branch on upstream, since git 1.7.11) In both cases, since the upstream empty repo has no branch: there is no matching named branch yet there is no upstream branch at all (with or without the same name! Tracking or not) That means your local first pus...
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How do you get the length of a string?

... 474 You don't need jquery, just use yourstring.length. See reference here and also here. Update: ...
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Intelligent point label placement in R

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When do we have to use copy constructors?

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Select n random rows from SQL Server table

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O(nlogn) Algorithm - Find three evenly spaced ones within binary string

...bove, we get the polynomial q(x) = x16 + 2x13 + 2x12 + 3x10 + 4x9 + x8 + 2x7 + 4x6 + 2x5 + x4 + 2x3 + x2. This step is O(n log n). Ignore all terms except those corresponding to x2k for some k in L. For the example above, we get the terms x16, 3x10, x8, x4, x2. This step is O(n), if you choose to do...
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What is the main difference between Inheritance and Polymorphism?

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