Question

我试图遍历数组@idea_benefit，如下所示：

["happier_customers", "happier_employees", "increased_revenue", "happier_customers", "decreased_costs", "happier_customers", "increased_revenue", ]

我需要将其元素人性化并大写，如：

["Happier Customers", "Increased Revenue", ...]

我试过了：

@idea_benefit = []
@evaluations.each do |eval|
  @idea_benefit << eval.benefit
  @idea_benefit.flatten
end
@idea_benefit.each do |benefit|
  benefit.gsub("_", " ").capitalize
end

但我无法定位单个字符串。我如何使这项工作？

Answer 1

在Rails中，您可以使用humanize和titleize来完成。

a =  ["happier_customers", "happier_employees", "increased_revenue", "happier_customers", "decreased_costs", "happier_customers", "increased_revenue" ]
a.map { |string| string.humanize.titleize }
# => ["Happier Customers", "Happier Employees", "Increased Revenue", "Happier Customers", "Decreased Costs", "Happier Customers", "Increased Revenue"]

Answer 2

@idea_benefit =
@evaluations.flat_map(&:benefit).map{|e| e.gsub("_", " ").capitalize}

Answer 3

您正在寻找可枚举方法map。

@idea_benefit = []
@evaluations.each do |eval|
  @idea_benefit << eval.benefit
  @idea_benefit.flatten
end

desired_output = @idea_benefit.map do |benefit|
  benefit.gsub("_", " ").capitalize
end

map方法对Enumerable对象的每个元素（在您的情况下为Array）进行操作，并返回一个新的Enumerable。如果需要，块可以是多行;块的返回值（通常是最后一行的结果）是新数组中的内容。

如何使用迭代修改数组中的字符串

3 个答案: