02 2016 档案
摘要：Given a pattern and a string str, find if str follows the same pattern. Here follow means a full match, such that there is a bijection between a lette
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摘要：Given a 2D board containing 'X' and 'O', capture all regions surrounded by 'X'. A region is captured by flipping all 'O's into 'X's in that surrounded
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摘要：Given an array and a value, remove all instances of that value in place and return the new length. The order of elements can be changed. It doesn't ma
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摘要：Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example:Given binary tree {3
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摘要：Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest l
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摘要：Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest l
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摘要：Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined as a binary tree in which the dept
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摘要：Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as the Hamming weight). For example, the 32-bit
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摘要：Given an integer, write a function to determine if it is a power of three. Follow up:Could you do it without using any loop / recursion? //cmath里内置的有关
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摘要：Given an integer, write a function to determine if it is a power of two. 题解：一次一次除2来做的话，效率低。所以使用位运算的方法（左移一位相当于原数乘2）列出在int范围内的所有2的倍数，然后和n异或如果等于0，那么n就是它（
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摘要：Given an array containing n distinct numbers taken from 0, 1, 2, ..., n, find the one that is missing from the array. For example,Given nums = [0, 1,
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摘要：A peak element is an element that is greater than its neighbors. Given an input array where num[i] ≠ num[i+1], find a peak element and return its inde
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摘要：Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in or
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摘要：Search for a Range Given a sorted array of integers, find the starting and ending position of a given target value. Your algorithm's runtime complexit
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摘要：1.函数本身可以赋值给变量（即变量可以指向函数）。而其实函数名本身就是指向函数的变量。 2.一个函数可以接受另一个函数作为参数。这种函数称为高阶函数。 def add(a,b,f) return f(a)+f(b) 3.map和reduce map函数接收两个参数，一个是函数，一个是Iterable
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摘要：“apt-get”命令，这是用于管理已安装程序的通用命令。 安装：apt-get install name 卸载：apt-get remove name 卸载并清除配置：apt-get --purge remove name 更新信息库：apt-get update 系统升级：apt-get upg
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摘要：1.vector::pop_back() 删除vector的最后一个元素，vector的大小减一，删了的元素被销毁。 2.vector::erase() iterator erase (iterator position); iterator erase (iterator first, itera
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摘要：原文链接http://www.ibm.com/developerworks/cn/aix/library/1212_lufang_c11new/ 本文将介绍 C++11 标准的两个新特性：defaulted 和 deleted 函数。对于 defaulted 函数，编译器会为其自动生成默认的函数定义
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摘要：每一个class，编译器都会自动生成四个特殊成员函数： destructor（析构函数） default constructor（默认构造函数） copy constructor（copy构造函数） copy assignment operator =（copy assignment操作符） 但是有
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摘要：1.const成员函数不能更改成员变量 #include <bits/stdc++.h> using namespace std; class CtextBlock { public: size_t length() const; private: char* pText; size_t textL
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摘要：1.若用户刷新一个包含POST表单的页面，那么请求将会重新发送造成重复。 这通常会造成非期望的结果，比如说重复的数据库记录。如果用户在POST表单之后被重定向至另外的页面，就不会造成重复的请求了。我们应每次都给成功的POST请求做重定向。 2. （1）form.is_valid()查看form中的数
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