inopinatus/inequalities.md

## inequalities.md

      
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              inequalities.md
            
          
Inequality
Interval
Ruby range
Active Record*
Arel**


n >= x
[x..∞)
x..
where(n: x..)
n.gteq(x)


n <= x
(-∞..x]
..x
where(n: ..x)
n.lteq(x)


n < x
(-∞..x)
...x
where(n: ...x)
n.lt(x)


n > x
(x..∞)
n/a
where.not(n: ..x)
n.gt(x)


x <= n <= y
[x..y]
x..y
where(n: x..y)
n.between(x..y)


x <= n < y
[x..y)
x...y
where(n: x...y)
n.between(x...y)


x < n <= y
(x..y]
n/a
where.not(n: ..x).where(n: ..y)
n.gt(x).and(n.lteq(y))


x < n < y
(x..y)
n/a
where.not(n: ..x).where(n: ...y)
n.gt(x).and(n.lt(y))


* When using predicate builder for Ranges, for reliable scope composition e.g. in the presence of association joins, self-joins, merges etc.

** When n = Model.arel_attribute(:n)
Inequality	Interval	Ruby range	Active Record*	Arel**
n >= x	[x..∞)	x..	where(n: x..)	n.gteq(x)
n <= x	(-∞..x]	..x	where(n: ..x)	n.lteq(x)
n < x	(-∞..x)	...x	where(n: ...x)	n.lt(x)
n > x	(x..∞)	n/a	where.not(n: ..x)	n.gt(x)
x <= n <= y	[x..y]	x..y	where(n: x..y)	n.between(x..y)
x <= n < y	[x..y)	x...y	where(n: x...y)	n.between(x...y)
x < n <= y	(x..y]	n/a	where.not(n: ..x).where(n: ..y)	n.gt(x).and(n.lteq(y))
x < n < y	(x..y)	n/a	where.not(n: ..x).where(n: ...y)	n.gt(x).and(n.lt(y))