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Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
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It simply saves space in the instructions, and the instruction set. You can move small immediate values to a 64-bit register by using existing (32-bit) instructions.
It also saves you from having to encode 8 byte values for MOV RAX, 42, when MOV EAX, 42 can be reused.
This optimizatio...
Correct use for angular-translate in controllers
...have to handle promises this way. The output of the filter can be directly set to a scope variable.
.controller('TranslateMe', ['$scope', '$filter', function ($scope, $filter) {
var $translate = $filter('translate');
$scope.pageTitle = $translate('TITLE.DASHBOARD'); // Assuming TITLE.DASHB...
Socket.IO Authentication
...nd({rediskey: req.sessionID});
Client side:
//store the key in a cookie
SetCookie('rediskey', <%= rediskey %>); //http://msdn.microsoft.com/en-us/library/ms533693(v=vs.85).aspx
//then when socket is connected, fetch the rediskey from the document.cookie and send it back to server
var socke...
Response.Redirect with POST instead of Get?
...new in ASP.Net 3.5 is this "PostBackUrl" property of ASP buttons. You can set it to the address of the page you want to post directly to, and when that button is clicked, instead of posting back to the same page like normal, it instead posts to the page you've indicated. Handy. Be sure UseSubmitBe...
Converting string to numeric [duplicate]
..."picman.txt", header=TRUE, sep="/t") since I don't have access to the data set.
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How to put labels over geom_bar for each bar in R with ggplot2
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Great thanks, by the way, the code suggests setting ymax, so aes(x=Types, y=Number, fill=sample, ymax = 16000), will produce wider upper area for y-axis, so that 15815 will get better shown.
– Puriney
Aug 19 '12 at 3:00
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Get first and last date of current month with JavaScript or jQuery [duplicate]
...Date(14, 0, 1);
gives 1 January, 1914. To avoid that, create a Date then set its values using setFullYear:
var date = new Date();
date.setFullYear(14, 0, 1); // 1 January, 14
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Mac 下载安装Redis - 更多技术 - 清泛网 - 专注C/C++及内核技术
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$redis->connect('127.0.0.1', 6379, 60); // 2.5 sec timeout.
$redis->set('test','Hello World');
echo $redis->get('test');
保存后访问该文件。看下是否成功返回数据。
Mac Redis 安装
Xcode iOS 8 Keyboard types not supported
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I too had this problem after updating to the latest Xcode Beta. The settings on the simulator are refreshed, so the laptop (external) keyboard was being detected. If you simply press:
iOS Simulator -> Hardware -> Keyboard -> Connect Hardware Keyboard
then the software keyboard wil...
WPF - How to force a Command to re-evaluate 'CanExecute' via its CommandBindings
...a Menu where each MenuItem in the hierarchy has its Command property set to a RoutedCommand I've defined. The associated CommandBinding provides a callback for the evaluation of CanExecute which controls the enabled state of each MenuItem .
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