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php数组下标加单引号、双引号和不加的效率比较
1.数字类型索引的不加。2.字符串类型的索引必加,优先加单引号。依据如下一般情况下都可以,但是当索引为数字时,如果通过$arr['1']则会先将1转换为数字,这样会影响效率如果为字符串时,那么如果不加引号,如果此时有一个常量和索引值相等,则会将索引转换为常量值。如defined("name","zh...
分类:编程语言   时间:2015-01-17 06:22:31    阅读次数:201
[问题记录]libpomelo编译报错:ssize_t重定义
1.时间:2015/01/16描述:添加libpomelo到cocos2dx项目,报错如下图所示:解决: 修改代码,源代码:#if !defined(_SSIZE_T_) && !defined(_SSIZE_T_DEFINED)typedef intptr_t ssize_t;# define ....
分类:其他好文   时间:2015-01-16 18:59:13    阅读次数:682
std::ostream_iterator用法
Defined in header template> class ostream_iterator : public std::iteratorstd::ostream_iteratoris a single-passOutputIteratorthat writes successi...
分类:其他好文   时间:2015-01-16 16:27:35    阅读次数:260
Validate Binary Search Tree Leetcode Python
Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only nodes with keys less than the node's ke...
分类:编程语言   时间:2015-01-16 10:12:49    阅读次数:163
[leetcode] 98 Validate Binary Search Tree
问题描述: Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only nodes with keys less than the node'...
分类:其他好文   时间:2015-01-14 22:53:40    阅读次数:179
Andorid之Process and Threads
一:AsyncTask(框架) An asynchronous task is defined by a computation that runs on a background thread and whose result is published on the UI thread. An a...
分类:其他好文   时间:2015-01-14 22:38:41    阅读次数:320
LeetCode--Balanced Binary Tree
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 depth of the two subtrees of every node never diffe...
分类:其他好文   时间:2015-01-14 15:33:12    阅读次数:141
LeetCode--Validate Binary Search Tree
Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only nodes with keys less than the node's key.Th...
分类:其他好文   时间:2015-01-14 09:52:48    阅读次数:161
JavaScript函数遇实参与形参——智能而有原则
1.实参与形参个数可以有偏差,不会因为参数不统一而错误。 2.JS函数不能重载。 3.函数运用arguments对象,很有特点 简单比较例2、例4、例8,可以得出这样的结论,JS中的函数体与形参、实参以及形参与实参的关系是: 遵循一个原则:函数实现功能 函数体与形参关系:形参必须满足函数体的必要需求,否则没法进行,即使用了形参未定义的‘字面量’,出错:c is not defined 。 形参与实参关系:实参在形参的标尺下,多出的...
分类:编程语言   时间:2015-01-13 23:18:14    阅读次数:367
#ifdef __cplusplus extern "C" { #endif”的定义
看一些程序的时候老是有 “#ifdef __cplusplus extern "C" { #endif”的定义,搞搞清楚是怎么回事: Microsoft-Specific Predefined Macros __cplusplus Defined for C++ programs only.  意思是说,如果是C++程序,就使用 extern "C"{ 而这个东东,是指在下面的...
分类:其他好文   时间:2015-01-13 21:40:30    阅读次数:222
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