Ruby中的字符串是可变的,用str << "a"的方式,是在str这个对象上直接修改,比str = str + "a"快,逻辑也清晰 array << "a"表示将"a"追加到array末尾,作为最后一个元素 file << ""表示打印到file对象,相当于file.print "a" 对于整数来说,<<则是位移方法。对象不同,<<的涵义也不同,很好的duck typin...
vsnprintf.c Use free with ruby_dtoa Dec 8, 2023 warning.rb Kernel#warn: don't call Warning.warn unless the category is enabled Jun 13, 2024 weakmap.c Fix a typo in WeakKeyMap argument error Feb 5, 2025 yjit.c Prevent enabling yjit when zjit enabled (GH-13358) May 17, 2025 ...
index|puts"value:#{value}class:#{value.class}index:#{index}"end# --- 输出结果 ---value:[:a,"1"]class:Arrayindex:0value:[:b,"2"]class:Arrayindex:1value:[:c,"3"]class:Arrayindex:2value:[:d,"4"]class:Arrayindex:3value:[:e,"5"]class:Arrayindex:4 代码...
# students = [] # create an empty array named students student = Array.new(3) {90} # [90,90,90] student = Array.new(3) { # create a 2 dimensional 3 x 2 array [[nil,nil], [nil,nil], [nil,nil]] Array.new(2) } student = %i[open close] # [:open, :close] , array o...
# 遍历 Range/Array等(0..10).eachdo|num|puts num end # 读取文件 File.foreach('README.md').with_indexdo|line,line_num|puts"#{line_num}: #{line}"end # 遍历文件 Dir.glob('*.rb'){|ruby_src|puts"found #{ruby_src}"} 上面示例演示了block的两种字面量(literal)形式,非常方便简洁。但...
do |element, index| puts "#{element} is number #{index} in the array"endcounter = 1while counter <= 5 do puts "iteration #{counter}" counter += 1end#=> iteration 1#=> iteration 2#=> iteration 3#=> iteration 4#=> iteration 5# Ruby 中还有很多有用的循环遍历函数，# 如"map...
Array.new # 相当于 [] %w{ haha xixi hoho } # %w方式定义字符串数组 Ruby的数组(及其他集合)中成员类型不必一样,这就是传说中的异构 典型方法 +/-/*/&/<< # +等于concat [ 1, 2, 3 ] + [ 4, 5 ] #=> [ 1, 2, 3, 4, 5 ] ...
<iostream> #include <map> #include <vector> using namespace std; //从文件中读取纹理 unsigned int TextureFromFile(const char *path, const string &directory, bool gamma = false); //Model类 class Model { public: /* Model数据 */ //存储到目前为止加载的所有纹理,优化以确保纹理不会被加载多次...
Array.new # 相当于 [] %w{ haha xixi hoho } # %w方式定义字符串数组 Ruby的数组(及其他集合)中成员类型不必一样,这就是传说中的异构 典型方法 +/-/*/&/<< # +等于concat [ 1, 2, 3 ] + [ 4, 5 ] #=> [ 1, 2, 3, 4, 5 ] ...
each { |a, b, c| a + b + c } # good - this comma is meaningful for array destructuring [[1, 2, 3], [4, 5, 6]].map { |a,| a } Nested Method Definitions Do not use nested method definitions, use lambda instead. Nested method definitions actually produce methods in the ...