Ruby 数式匹配器

str = "x^2 + 12317 +X^2 - Length"

str = " x ^ 2 + y ^ 2 = 2 "

count = 8.4

print("count: #{count} ")

if /^(\s*[a-zA-Z]+\s*\(\s*[0-9a-zA-Z]+\s*\)\s*[\+\-\*\/\=]\s*)?\s*[0-9a-zA-Z]+\s*\^?\s*[0-9a-zA-Z]*\s*[\+\-\*\/]\s*(\s*[0-9a-zA-Z]+\^?[0-9a-zA-Z]*\s*)\s*(\s*[\+\-\*\/\=]\s*[0-9a-zA-Z]+)?/ =~ str

puts(MATCHED)

else

puts(DISMATCHED)

end

str = str.gsub(/\s+/, "")

str = str.gsub(/\+/, " + ")

str = str.gsub(/\-/, " - ")

str = str.gsub(/\*/, " * ")

str = str.gsub(/\//, " \\ ")

str = str.gsub(/\=/, " = ")

puts(str)

运行结果

count: 8.4
matched

x^2 + y^2 = 2

巴特西

Ruby 数式匹配器

最新文章

热门文章