1.BasicObject中定义了 == 和equal?这两个方法,两个方法等价,用来比较两个对象是否是同一个对象,是的话结果就为true. 既然两者相同,为何要定义两个呢?只是为了再命名一个别名吗?官方解释是==用于给子类重载,equal?永不重载. 结论:①.== 等价于 equal? ②.== 用于给子类重载,equal?永不重载 // BasicObject#equal? VALUE rb_obj_equal(VALUE obj1, VALUE obj2) { if (obj1 == o…

function eql(obj, other) { if(stringp(obj) && stringp(other) && obj === other) return false; return obj === other; } function equal(obj, other, equalp) { if (equalp === void 0) { equalp = false; } var _tostring = function (value) { return…

原文 http://www.wellho.net/mouth/985_Equality-in-Ruby-eql-and-equal-.html Equality in Ruby - == eql? and equal? The == comparison checks whether two values are equal eql? checks if two values are equal and of the same type equal? checks if two things a…

“==” 最常见的相等性判断 “==” 使用最频繁,它通常用于对象的值相等性(语义相等)判断,在 Object 的方法定义中,“==” 比较两个对象的 object_id 是否一致,通常子类都会重写覆盖这个方法,通过比较内部值来判断对象是否相等. 比如 String 类,他是来计较实际的文字串是否相同,而不在意是否来自同一个内存区域 a = 'abc' #=> 44547600 b = 'abc' + '' #=> 44547540 a == b #=> true “===” 主要用于…

Given a non-empty integer array, find the minimum number of moves required to make all array elements equal, where a move is incrementing a selected element by 1 or decrementing a selected element by 1. You may assume the array's length is at most 10…

Given a non-empty integer array of size n, find the minimum number of moves required to make all array elements equal, where a move is incrementing n - 1 elements by 1. Example: Input: [1,2,3] Output: 3 Explanation: Only three moves are needed (remem…

Given a non-empty array containing only positive integers, find if the array can be partitioned into two subsets such that the sum of elements in both subsets is equal. Note: Both the array size and each of the array element will not exceed 100. Exam…

参考:http://stackoverflow.com/questions/34584416/nested-loops-with-arrays You are going to be given an array of integers. Your job is to take that array and find an index N where the sum of the integers to the left of N is equal to the sum of the integ…

首先,==有很多限制,如Integer 类型的值在[-128,127] 期间,Integer 用 “==”是可以的(参考),超过范围则不行,那么使用equal则代替则完全ok public static void main(String[] args) { Long prop=4004L; Long prop1=4004l; Integer prop2=4004; Integer prop3=4004; if(prop2.equals(prop3)){ System.out.println("h…

无法解决 equal to 操作中 "SQL_Latin1_General_CP1_CI_AS" 和 "Chinese_PRC_CI_AS" 之间 2011-03-11 15:26:57 分类: 数据库开发技术 2011年03月10日 CCE3.03的服务器采用英文的2003R2 数据库排序规则为拉丁文忽略大小写. 我的存储过程中遇到了"无法解决 equal to 操作中 "SQL_Latin1_General_CP1_CI_AS" 和…