block

Async data connections iOS

由 情到浓时终转凉″ 提交于 2020-01-15 07:52:32
问题 I've written a synchronisation class for the app I'm currently working on. Because of the large amount of data it first gets a data count and then batches up the downloads in an NSOperationQueue . This all works fine and I've got the sync algorithm working quickly. The way it works is as follows... - (void)synchroniseWithCompletionHandler://block for completion handler errorHandler://block for error handler { [self.queue addOperationWithBlock ^{ //Create an NSURLRequest for the first batch /

Magento Override Core Block

由 余生长醉 提交于 2020-01-15 03:22:14
问题 I'm trying to override class Mage_Catalog_Block_Navigation located at app/code/core/Mage/Catalog/Block/Navigation.php I've created this three files: 1.- app/code/local/Global/Catalog/Block/Navigation.php 2.- app/code/local/Global/Catalog/etc/config.xml 3.- app/etc/modules/Global_All.xml Code: Global_All.xml <?xml version="1.0"?> <config> <modules> <Global_Catalog> <active>true</active> <codePool>local</codePool> </Global_Catalog> </modules> </config> Config.xml <?xml version="1.0"?> <config>

小程序组件封装步骤

由 荒凉一梦 提交于 2020-01-15 00:54:42
学习链接：https://developers.weixin.qq.com/miniprogram/dev/framework/custom-component/ 1、创建一个组件文件夹component包括js、json、wxss、wxml 在json文件里配置 {"component": true} wxml中是组件要显示的内容 <view class="inner"> {{inteSt.width}} <swiper> <block wx:for="{{imgUrls}}"> <swiper-item> <image src="{{item}}" class="slide-image" width="355" height="150"/> </swiper-item> </block> </swiper> </view> <slot></slot> js Component({ properties: { // 这里定义了innerText属性，属性值可以在组件使用时指定 inteSt: { type: Object, value: {'name':'aa'}, }, data_json: { type: Object, value: 'default value', } }, data: { // 这里是一些组件内部数据 someData: {}, imgUrls: [ '

what are procs and lambdas? practical examples please [duplicate]

由 倾然丶 夕夏残阳落幕 提交于 2020-01-14 14:15:49
问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: When to use lambda, when to use Proc.new? (I know it had been asked several times but I couldn't find satisfactory answer)Can somebody please explain Blocks, Procs and Lambdas and why one should be used over other, what are the situation when one should use proc, similar and/or lambda. Also there effect on computer memory. Practical examples please. 回答1: Try Robert Sosinski's Tutorial or Learning to Program by

what are procs and lambdas? practical examples please [duplicate]

由 纵饮孤独 提交于 2020-01-14 14:15:37
问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: When to use lambda, when to use Proc.new? (I know it had been asked several times but I couldn't find satisfactory answer)Can somebody please explain Blocks, Procs and Lambdas and why one should be used over other, what are the situation when one should use proc, similar and/or lambda. Also there effect on computer memory. Practical examples please. 回答1: Try Robert Sosinski's Tutorial or Learning to Program by

Linux文件和目录的属性及权限

由 老子叫甜甜 提交于 2020-01-14 03:48:56
Linux 文件和目录的属性及权限讲解 文字解释： 第一列：inode 索引节点 第二列：文件类型及权限 第三列：硬链接个数 第四列：文件或目录所属的用户（属主） 第五列：文件或目录所属的用户所归属的组（用户组） 第六列：文件或目录的大小 第七、八、九列：文件或目录的最近修改时间 第十列：实际的文件名或目录名 （文件名称存放在上级目录的 block 中） ls -l 显示的时间是修改时间。 [root@oldboy ~]# ls -l --time-style=long-iso total 9104 -rw-------. 1 root root 1056 2016-07-05 21:13 anaconda-ks.cfg drwxr-xr-x. 8 root root 4096 2016-07-18 17:57 data -rw-r--r--. 1 root root 9264484 2015-04-15 01:40 etc.tar.gz -rw-r--r--. 1 root root 21682 2016-07-05 21:13 install.log -rw-r--r--. 1 root root 5890 2016-07-05 21:12 install.log.syslog 文件的时间 说明 ： Access: 2016-07-21 15:33:01.698142377

SignalR Connection Blocked Until page images load

由 天涯浪子 提交于 2020-01-14 03:33:07
问题 this is my signalr hub connection : chat = $.connection.chat; $.connection.hub.start().done(function () { // problem is here // this part is waiting for full page load.! }); why signalr connection waits for my page contents to load complete? i have a <img src='BAD SERVER'/> sometimes take 2 minutes to load successfully. and the connection is waiting for images loaded.! how can i fix this problem ? 回答1: Try this: chat = $.connection.chat; $.connection.hub.start({ waitForPageLoad: false }).done

why i cant instantiate objects inside a switch-case block

由 好久不见. 提交于 2020-01-12 15:54:53
问题 my code has 3 classes n_hexa,n_octa,n_bin. The code is here switch(choice) { case 1: cin>>n; n_hexa nx(n); break; case 2: cin>>n; n_octa no(n); break; case 3: cin>>n; n_bin nb(n); break; } on compiling it gives a message " crosses initialisation of n_hexa " for line of n_octa 回答1: If you want to have temporary objects inside a case, you'll need to scope them properly. switch(choice) { case 1: { cin>>n; n_hexa nx(n); break; } case 2: { cin>>n; n_octa no(n); break; } case 3: { cin>>n; n_bin nb

Determine what is blocking UI thread

由 与世无争的帅哥 提交于 2020-01-12 05:24:29
问题 I am working on a rather large .NET WPF real-time application. The application is working great and as expected, except for one BIG issue - UI Update is slow. This application is highly event driven, there are events raised all over for all sorts of things - through these events the UI is updated. One or many of these events is blocking the UI from displaying immediately. When all the work is complete, the UI shows the expected results. Is there any way of determining which event handler is

In Ruby is it possible to create a local variable explicitly

由 寵の児 提交于 2020-01-11 10:17:33
问题 e.g. x = 123 p = Proc.new { x = 'I do not want change the value of the outer x, I want to create a local x' } In Ruby Is there something the same as "my" keyword in Perl ? 回答1: As per the Perl documentation of my,I think you are looking for something like below in Ruby:- x = 123 p = Proc.new {|;x| x = 'I do not want change the value of the outer x, I want to create a local x' } p.call # => "I do not want change the value of the outer x, I want to create a local x" x # => 123 回答2: Beware!
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