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iOS开发过程中的各种tips - 更多技术 - 清泛网 - 专注C/C++及内核技术
...直接在介绍AFNetworking的时候详解吧。
25.使用NSURLConnection下载数据
1. 创建对象
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://www.baidu.com"]];
[NSURLConnection connectionWithRequest:request delegate:self];
2. NSURLCon...
Can a Windows batch file determine its own file name?
... - expands %I to a file extension only
%~sI - expanded path contains short names only
%~aI - expands %I to file attributes of file
%~tI - expands %I to date/time of file
%~zI - expands %I to size of file
%~$PATH:I - searches the directories listed in the PATH
...
MySQL复制的概述、安装、故障、技巧、工具 - 数据库(内核) - 清泛网 - 专注...
...新CHANGE MASTER TO即可，系统会抛弃当前的中继日志，重新下载：
mysql> CHANGE MASTER TO
MASTER_LOG_FILE='<Relay_Master_Log_File>',
MASTER_LOG_POS=<Exec_Master_Log_Pos>;
mysql> START SLAVE;
至于为什么使用的是Relay_Master_Log_File & Exec_Master_Log_Pos...
Finding three elements in an array whose sum is closest to a given number
...fy the problem statement, instead we will search for aj and ak that sum to ai +S.
– Boolean
May 20 '11 at 14:59
3
...
Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
... every polynomial factors uniquely (ring of polynomials is an Euclidean domain), this means ai are uniquely determined, up to permutation.
This ends a proof that remembering powers is enough to recover the numbers. For constant k, this is a good approach.
However, when k is varying, the direct app...
Find which commit is currently checked out in Git
...how.
git log -1.
Bash prompt.
git status.
git bisect visualize.
I'll explain each option in detail below.
Option 1: git show
As explained in this answer to the general question of how to determine which commit you currently have checked-out (not just during git bisect), you can use git show wit...
How are 3D games so efficient? [closed]
...timized instructions and special techniques exist when you're developing against a particular set of hardware, to enable even better speedups.
The other part of your question is why a demo uses so much CPU:
... while a DX demo of a rotating Teapot @ 60fps uses a whopping 30% ?
It's common fo...
REDHAT 6.4 X64下ORACLE 11GR2静默安装 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...可以不安装或在安装完 pdksh 以后再安装。
将pdksh 程序包下载到本地。 Pdksh安装包需要在网上下载光盘里没有
# rpm -ivh pdksh-5.2.14-37.el5_8.1.x86_64.rpm
注意：如果提示该程序包与 ksh冲突，如果已经安装 ksh，建议使用命令 rpm -e ksh...
Find a Git branch containing changes to a given file
I have 57 local branches. I know I made a change to a certain file in one of them, but I'm not sure which one. Is there some kind of command I can run to find which branches contain changes to a certain file?
...
Working with select using AngularJS's ng-options
...ect controls, and not just primitive types. For example:
app.controller('MainCtrl', function($scope) {
$scope.items = [
{ id: 1, name: 'foo' },
{ id: 2, name: 'bar' },
{ id: 3, name: 'blah' }
];
});
<div ng-controller="MainCtrl">
<select ng-model="selectedItem" ng...