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@ -29,7 +29,7 @@ The idea of minimising the context needed to understand your code goes beyond ju
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There are three common classes of surprises in R:
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There are three common classes of surprises in R:
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1. Unstable types: What what will `df[, x]` return? You can assume that `df`
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1. Unstable types: What will `df[, x]` return? You can assume that `df`
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is a data frame and `x` is a vector because of their names. But you don't
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is a data frame and `x` is a vector because of their names. But you don't
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know whether this code will return a data frame or a vector because the
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know whether this code will return a data frame or a vector because the
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behaviour of `[` depends on the length of x.
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behaviour of `[` depends on the length of x.
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