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Ported a short MATLAB script to R and one result came back as a matrix
Trying to redo a short MATLAB script in R, and I've barely touched MATLAB before. Most of it came over fine, except for a sin…
na.rm = TRUE on a group that is all NA
Per-group totals with tapply(x, g, sum, na.rm = TRUE), and one group came back as 0. Every value in that group is NA. Not a s…
NOT IN and one NULL
SELECT * FROM orders o WHERE o.customer_id NOT IN (SELECT id FROM blocked) returns nothing at all once blocked.id holds a sin…
COUNT(col) changed what a ratio meant
A report showed the share of orders with a shipping date as COUNT(shipped_at) * 1.0 / COUNT(*). It was right for a while. The…
Ambiguous Julia methods and f(2, 3)
Two Julia methods, f(x::Integer, y::Number) and f(x::Number, y::Integer). Each runs a different algorithm, chosen for whichev…
