匹配整數

Question

我有一個查詢。我有兩個整數範圍，例如100-500和600-800。這是他們如何看：

範圍1

start_range = 100 
end_range = 500 

範圍2

start_range_new = 600 
end_range_new = 800 

我想在我可以匹配兩個範圍（範圍1和範圍內的方法的邏輯2）使這兩個範圍完全排斥，這意味着這兩個範圍不相交。

如果兩個範圍相交，則將局部變量設爲true，如果不是，則局部變量應爲false。

Answer 1

如果您使用Rails的（或的ActiveSupport），你可以使用Range#overlaps?方法：

# Compare two ranges and see if they overlap each other 

# (1..5).overlaps?(4..6) # => true 
# (1..5).overlaps?(7..9) # => false 

如果你不想使用的ActiveSupport，可以實現它自己的幫手功能：

# Compare two ranges and see if they overlap each other 
# overlaps?(1..5, 4..6) # => true 
# overlaps?(1..5, 7..9) # => false 
def overlaps?(one, another) 
    one.cover?(other.first) || other.cover?(one.first) 
end 

Answer 2

variable = !((start_range_new > end_range) || (start_range > end_range_new)) 

Answer 3

a = (0..20) 
b = (15..30) 

def exclusive?(x,y) 
    return x.first > y.last || x.last < y.first 
end 

exclusive?(a,b) //False