Ruby match string in array

Question

I have a string like that: "Men's Beech River Cable T-Shirt" how can I get category from this string?

str = "Men's Beech River Cable T-Shirt"
str2 = "MEN'S GOOSE EYE MOUNTAIN DOWN VEST"
cat1 = str1.split.last # T-Shirt
cat2 = str2.split.last # VEST

TOPS = %w(jacket vest coat blazer parka sweater shirt polo t-shirt)

Desired result:

category_str1 = "Tops" # Since T-Shirt (shirt) is in TOPS constant.
category_str2 = "Tops" # Since vest is in TOPS const.

I don't know how to describe my problem better, I hope you understand it from example provided.

TOPS has a shirt not a t-shirt, should those both be in TOPS? — Anthony
– Anthony, Commented Oct 16, 2015 at 15:41
Updated, but even if part of string matches - it should set category to Tops — ruby life questions
– ruby life questions, Commented Oct 16, 2015 at 15:43

steenslag · Accepted Answer · 2015-10-16 15:46:36Z

3

str = "Men's Beech River Cable T-Shirt"
cat_orig = str.split.last # T-Shirt

TOPS = %w(jacket vest coat blazer parka sweater shirt polo)
RE_TOPS = Regexp.union(TOPS)
category = "Tops" if RE_TOPS =~ cat_orig.downcase

Note there are no comma's in the %w() style array syntax.

answered Oct 16, 2015 at 15:46

steenslag

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Anthony Over a year ago

I like this, you could also use union = Regexp.union(TOPS); pattern = Regexp.new(union.source, Regexp::IGNORECASE) instead of down casing the string.

Tensibai · Accepted Answer · 2015-10-16 15:52:35Z

1

str = "Men's Beech River Cable T-Shirt"
cat_orig = str.split.last # T-Shirt

TOPS = %w(jacket vest coat blazer parka sweater shirt polo) # suppressed the comma to get a clean array

category = "Tops" if !cat_orig[/(#{TOPS.join("|")})/i].nil?

The join on the TOPS Array build an alternative regex of the form:

(jacket|vest|coat|blazer|parka|sweater|shirt|polo)

If any of those word is present in cat_orig, the return will be the matched word, if not it will return nil.

Note the leading i in the regex to makes it case insensitive.

answered Oct 16, 2015 at 15:52

Tensibai

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Comments

Richard Hamilton · Accepted Answer · 2015-10-16 16:08:25Z

1

The best way to do this is through a hash, not an array. Let's say your caetgories look something like this

categories = { "TOPS" => ["shirt", "coat", "blazer"],
               "COOKING" => ["knife", "fork", "pan"] }

We can then loop through each category and find if their values include the word in the string

categories.each do |key, value|    
  puts key if str.downcase.split(' ').any? { |word| categories[key].include?(word) }
end

Loop through each category, and find if the category has a word that the string has.

Note: This does not yet search for substrings.

edited Oct 16, 2015 at 16:08

answered Oct 16, 2015 at 15:43

Richard Hamilton

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1 Comment

ruby life questions Over a year ago

nice, but what about case should i do str.split.downcase.any?

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