Question

我正在尝试从文件中读取一个字符串，该字符串插入代码中定义的变量，并替换这些变量的字符串值。

文本文件：

my name is #{name}

代码：

file = File.open("tesst.txt", "r")
arr = []
name = "CDJ"
file.each_line.with_index { |line, index|
  puts line
}
file.close

期望的输出：

My name is CDJ

实际输出：

My name is #{name}

当输出为line.inspect时：

"My name is \#{name}"

任何人都可以帮我正确格式化这个字符串，所以它将＃{name}作为变量而不是带有插入的转义字符的字符串读取吗？

Answer 1

file= 'tesst.txt'
name = 'CDJ'

File.readlines(file).each do |line|
  eval("puts \"#{line}\"")
end

Answer 2

考虑一下：

jQuery(function($) {

  var $container = $('#isotope-list'); //The ID for the list with all the blog posts
  $container.isotope({ //Isotope options, 'item' matches the class in the PHP
    itemSelector: '.item',
    layoutMode: 'masonry'
  });

  // Add class when transition is finished
  $container.on( 'arrangeComplete', function( event, filteredItems ) {
    $(".grid figure img").addClass("imgArranged");
  });

  //Add the class selected to the item that is clicked, and remove from the others
  var $optionSets = $('#filters,#filters-undercat'),
    $optionLinks = $optionSets.find('a');

  $optionLinks.click(function() {
    var $this = $(this);
    // don't proceed if already selected
    if ($this.hasClass('selected')) {
      return false;
    }
    var $optionSet = $this.parents('#filters');
    $optionSets.find('.selected').removeClass('selected');
    $this.addClass('selected');

    //When an item is clicked, sort the items.
    var selector = $(this).attr('data-filter');
    $container.isotope({
      filter: selector
    });

    return false;
  });

});

备注：

可以通过哈希提供变量。
可以使用class Template def initialize(source: DATA) @text = source.read.chomp.split("\n") end def render(locals: {}) locals.each do |key, value| instance_variable_set("@#{key}", value) self.class.send(:attr_reader, key) end @text .map { |line| eval("\"#{line}\"") } .join("\n") end end puts Template .new(source: File.open('./tesst.txt', 'r')) .render(locals: {name: 'George', age: 29}) __END__ my name is #{name} I am #{age} years old切换
File，以便在DATA
之后从文件底部读取内容

从文件解析字符串时删除转义字符

2 个答案: