数値 (NumberHelper)
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桁区切りフォーマットへ変換
ruby# number_with_delimiter(number, options = {}) number_with_delimiter 123456789 #=> "123,456,789" number_with_delimiter 123456789, delimiter: "-" #=> "123-456-789" -
指定の桁で丸めたフォーマットへ変換
ruby# number_with_precision(number, options = {}) number_with_precision 123456789 #=> "123456789.000" number_with_precision 123.456789 #=> "123.457" number_with_precision 123.456789, precision:4 #=> "123.4568" number_with_precision 123.456789, precision:4, significant: true #=> "123.5" -
パーセントフォーマットへ変換
ruby# number_to_percentage(number, options = {}) number_to_percentage 1.0/4.0 * 100 #=> "25.000%" number_to_percentage 1.0/4.0 * 100, precision: 0 #=> "25%" -
通貨フォーマットへ変換
ruby# number_to_currency(number, options = {}) number_to_currency 123456789 #=> "$123,456,789.00" number_to_currency 123456789, unit: "ドル", format: "%n%u", precision: 0, delimiter: nil #=> "123456789ドル" "#{123456789}ドル" #=> "123456789ドル" -
単位フォーマットへ変換
ruby# number_to_human(number, options = {}) number_to_human 123456789 #=> "123 Million" number_to_human 123456789, units: { million: "M"}, precision: 4 #=> "123.5 M" -
バイト単位フォーマットへ変換
ruby# number_to_human_size(number, options = {}) number_to_human_size 123456789 #=> "118 MB" number_to_human_size 1000 #=> "1000 Bytes" number_to_human_size 1024 #=> "1 KB" -
電話番号フォーマットへ変換
ruby# number_to_phone(number, options = {}) number_to_phone "0123456789" #=> "012-345-6789" number_to_phone 123456789 #=> "12-345-6789" number_to_phone 123456789, country_code: 81 #=> "+81-12-345-6789"
日時 (DateHelper)
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時間の差を取得
ruby# distance_of_time_in_words(from_time, to_time = 0, options = {}) distance_of_time_in_words Time.now, Time.now #=> "less than a minute" distance_of_time_in_words Time.now, Time.now, include_seconds: true #=> "less than 5 seconds" -
現在から指定時間までの時間の差を取得
ruby# time_ago_in_words(from_time, options = {}) time_ago_in_words(3.minutes.ago) #=> "3 minutes" time_ago_in_words(3.minutes.since) #=> "3 minutes" helper.time_ago_in_words(40.seconds.since, include_seconds: true) #=> "less than a minute"
テキスト (TextHelper)
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省略フォーマットへ変換
ruby# truncate(text, options = {}, &block) truncate("長文は、全部表示するとえらいことになる", length: 10) #=> "長文は、全部表..." truncate("長文は、全部表示するとえらいことになる", length: 10, separator: "、") #=> "長文は..." truncate("長文は、全部表示するとえらいことになる", length: 10, separator: "、", omission: "．．．以下省略") #=> "長文は．．．以下省略" -
特定の文字を順に取得
ruby# cycle(first_value, *values) cycle("group a", "group b", "group c") #=> "group a" cycle("group a", "group b", "group c") #=> "group b" # current_cycle(name = "default") current_cycle #=> "group b" cycle("group a", "group b", "group c") #=> "group c" cycle("group a", "group b", "group c") #=> "group a" # reset_cycle(name = "default") reset_cycle cycle("group a", "group b", "group c") #=> "group a" -
HTMLタグを付与したフォーマットへ変換
ruby# simple_format(text, html_options = {}, options = {}) simple_format "<blink>例</blink>" #=> "<p>例</p>" simple_format "<blink>例</blink>", {name: "example"}, wrapper_tag: "div", sanitize: false #=> "<div name=\"example\"><blink>例</blink></div>" -
特定文字数を元に改行整形したも文字列を取得
ruby# word_wrap(text, options = {}) word_wrap "起 承 転 結", line_width: 3 #=> "起 承\n転 結" word_wrap "起 承 転 結", line_width: 1 #=> "起\n承\n転\n結"
rails consoleで試してみる
console
helper.number_to_currency(99999999.99) #=> "$99,999,999.99"
helper.number_to_currency(99999999.99, precision: 0) #=> "$100,000,000"
# svenfuchs/rails-i18n のja.yml を適用している場合
# precision:0, unit: 円 となる
I18n.locale= :ja
helper.number_to_currency(99999999.99) #=> "100,000,000円"
helper.number_to_currency(99999999.99, precision: 2) #=> "99,999,999.99円"