码迷,mamicode.com
首页 >  
搜索关键字:defined    ( 2488个结果
定时器setTimeout/setInterval中变量报错:not defined 的解决方法
首先声明本人资质尚浅,如有错误,欢迎指正、共同提高。 首先声明:本文不重点讨论this作用域,而是讨论普通变量在定时器中容易报错的情况; setTimeout的基本用法不再重述, 详见:http://www.w3school.com.cn/htmldom/met_win_settimeout.asp ...
分类:其他好文   时间:2018-04-25 19:04:18    阅读次数:193
1005:Number Sequence(hdu,数学规律题)
Problem Description A number sequence is defined as follows:f(1) = 1, f(2) = 1, f(n) = (A * f(n - 1) + B * f(n - 2)) mod 7.Given A, B, and n, you are ...
分类:其他好文   时间:2018-04-25 00:14:53    阅读次数:202
InvalidRequestError: Table is already defined for this MetaData instance. Specify 'extend_existing=True' to redefine options and columns on an existing Table object.
解决方法 添加在导入包后的位置 执行 参考链接:https://stackoverflow.com/questions/37908767/table roles users is already defined for this metadata instance ...
分类:Web程序   时间:2018-04-22 16:07:36    阅读次数:2469
composer autoload源码分析
现在很多主流框架都用到了composer,包管理实在是方便。现在我就以yii2来举例追踪一遍composer autoload流程第一步上yii2的web/index.php(入口文件)<?php defined('YII_DEBUG') or define('YII_DEBUG', true); defined('YII
分类:其他好文   时间:2018-04-21 16:10:50    阅读次数:230
SPOJ:Fibonacci Polynomial(矩阵递推&前缀和)
Problem description. The Fibonacci numbers defined as f(n) = f(n-1) + f(n-2) where f0 = 0 and f1 = 1. We define a function as follows D(n,x) = x + x^2 ...
分类:其他好文   时间:2018-04-20 23:46:38    阅读次数:193
stm32的hall库新建模板编译错误: #error "Please select first the target STM32F1xx device used in your application (in stm32f1xx.h file)"的处理
在stm32f1xx.h file文件中找到如下代码: /* Uncomment the line below according to the target STM32L device used in your application */#if !defined (STM32F100xB) && ...
分类:移动开发   时间:2018-04-20 00:11:55    阅读次数:460
CodeForces - 393E Yet Another Number Sequence
Discription Everyone knows what the Fibonacci sequence is. This sequence can be defined by the recurrence relation: We'll define a new number sequence ...
分类:其他好文   时间:2018-04-17 20:56:13    阅读次数:199
关于JS形参是局部变量的问题
举个简单的函数例子 function getNum(num){ num =100; console.log(num); } getNum(); console.log(num); 结果是:100和Uncaught ReferenceError: num is not defined 虽然在函数中声明 ...
分类:Web程序   时间:2018-04-17 19:58:50    阅读次数:214
IDEA跑代码出现Error(7,8) ***App is already defined as object App object App extends Application { 错误的解决办法(图文详解)
不多说,直接上干货! 问题现象 问题原因 是你把权限放大了 helo is alreay defined as object helo public class helo { 解决办法 1、 File -> Project Structure 2、main,不需放大权限 欢迎大家,加入我的微信公众号 ...
分类:移动开发   时间:2018-04-15 11:41:45    阅读次数:1538
Real Time Rendering 2
【Real Time Rendering 2】 1、The light vector l is usually defined pointing in a direction opposite to the direction the light is traveling. 2、The surfac ...
分类:其他好文   时间:2018-04-14 17:13:49    阅读次数:171
2488条   上一页 1 ... 58 59 60 61 62 ... 249 下一页
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!