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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
...//调用短信
tel://调用电话
itms://打开MobileStore.app
31.获取版本信息
UIDevice *myDevice = [UIDevice currentDevice];
NSString *systemVersion = myDevice.systemVersion;
32.UIWebView的使用
<UIWebViewDelegate>
webView.delegate = self;
(BOOL)webView:(UIWebView *)webView...
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...
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...
转：postfix安装Q&A - 更多技术 - 清泛网 - 专注C/C++及内核技术
...成pam_mysql.so模块。
A:
装mysql的devel和shared包吧，对应版本的，用mysql.com上面的就行
QUOTE:
Q：
安装POSTFIX2.2.7出错
[root@mail postfix-2.2.7]# make
make -f Makefile.in MAKELEVEL= Makefiles
(echo "# Do not edit -- this file docu...
java中的缓存技术该如何实现 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...为JSR-107开源规范，JSR-107规范已经很多年没改变了。这个版本仍然是构建在最初的功能定义上。
官方网站 http://jcache.sourceforge.net/
ShiftOne
ShiftOne Java Object Cache是一个执行一系列严格的对象缓存策...
Final arguments in interface methods - what's the point?
... @Dormouse, it's interesting, because Android Studio (3.1.4 Build #AI-173.4907809) does not :(
– The Godfather
Nov 12 '18 at 20:30
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