I'm scanning through a product name to check if a specific string exists in it. Right now it works for a single string, but how can I can scan for multiple strings? e.g. i'd like to scan for both apple and microsoft
我正在扫描一个产品名称，以检查其中是否存在一个特定的字符串。现在它只适用于一个字符串，但是我怎么才能扫描多个字符串呢?我想扫描苹果和微软
product.name.downcase.scan(/apple/)
If the string is detected i get ["apple"] if not then it returns nil [ ]
如果字符串被检测到，我得到["apple"]如果不是，那么它返回nil []
2 个解决方案
#1
5
You can use regex alternation:
您可以使用regex交替:
product.name.downcase.scan(/apple|microsoft/)
If all you need to know is whether the string contains any of the specified strings, you should better use single match =~ instead of scan.
如果您需要知道的是字符串是否包含指定的字符串，那么您应该更好地使用单个match =~而不是扫描。
str = 'microsoft, apple and microsoft once again'
res = str.scan /apple|microsoft/ # => res = ["microsoft", "apple", "microsoft"]
# do smth with res
# or
if str =~ /apple|microsoft/
# do smth
end
#2
2
You could also skip regular expressions altogether:
你也可以跳过正则表达式:
['apple', 'pear', 'orange'].any?{|s| product.name.downcase.match(s)}
or
或
['apple', 'pear', 'orange'].any?{|s| product.name.downcase[s]}
#1
5
You can use regex alternation:
您可以使用regex交替:
product.name.downcase.scan(/apple|microsoft/)
If all you need to know is whether the string contains any of the specified strings, you should better use single match =~ instead of scan.
如果您需要知道的是字符串是否包含指定的字符串，那么您应该更好地使用单个match =~而不是扫描。
str = 'microsoft, apple and microsoft once again'
res = str.scan /apple|microsoft/ # => res = ["microsoft", "apple", "microsoft"]
# do smth with res
# or
if str =~ /apple|microsoft/
# do smth
end
#2
2
You could also skip regular expressions altogether:
你也可以跳过正则表达式:
['apple', 'pear', 'orange'].any?{|s| product.name.downcase.match(s)}
or
或
['apple', 'pear', 'orange'].any?{|s| product.name.downcase[s]}