block | 易学教程

Core overrides in Magento

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问题 So I found an answer for a question I had about dynamic option pricing, but that lead to me being stumped. I can understand the majority of the answer, but when it comes to the XML and module implementation, I'm lost. Here's what I'm trying to do: http://www.magentocommerce.com/boards/viewthread/260544/#t348802 Need to override the Mage_Catalog_Model_Product_Type_Price model and the Mage_Catalog_Block_Product_View_Options block. Modified Price.php is located at /app/core/local/rtega

Block and retain cycle can't catch it

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问题 I've got an issue with blocks and weak reference, I'm under ARC. I built a class it is a free project that is a kind of easy wrapper around Google Directions API you can download it here:link to the project Im'm using it inside a view controller the problem is that after using it the view controller is not deallocated. I guess that is an issue with this object because if I comment it out or set to nil everything works correctly. I'm not able to understand where is the retain cycle, of course

Block and retain cycle can't catch it

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How to pass a completion block to another class in Swift

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问题 In Objective-C, I used this handling of a completion-block that now must be transformed to Swift: in DetailDisplayController.h typedef void (^AddedCompletitionBlock)(BOOL saved, NSString *primarykey, NSUInteger recordCount); @interface DetailDisplayController : UITableViewController @property (nonatomic, copy) AddedCompletitionBlock completionBlock; @property (strong, nonatomic) Details *detail; in DetailDisplayController.m - (void) saveClicked:(id)sender { // retrieve PK NSString *objectId =

How to make a block visible only for admin and teacher in moodle?

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问题 I think there are more than one way to make block invisible for students . 1. Hide the block 2. Assign role to block and set permission to block But these are done by admin by change the settings. I need a way by code. How can I write the code to make the block invisible for student. For activity I can make invisible the activity by changing db/access.php 'mod/questionbank:view' => array( 'captype' => 'read', 'contextlevel' => CONTEXT_MODULE, 'legacy' => array( //'guest' => CAP_ALLOW, //

Magento Shortcode CMS block not working on product pages

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问题 I am attempting to add a CMS block on a Magento product page. The shortcode which I am using is: {{block type="cms/block" block_id="myproductblock"}} The block shows up as text. It does not insert the CMS block. I have made sure that the WYSIWYG editor is disabled. 回答1: I assume you want to add it to product.phtml To do this, you need to edit the layout/catalog.xml ... <catalog_product_view> .. ... <block type="catalog/product_view" name="product.info" template="catalog/product/view.phtml"> <

Magento CMS Page/Static Blocks - How to display store name?

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问题 I have number of Magento CMS pages and static blocks which use the variable {{store url=""}} to display the store url address in some text depending which store is being viewed. I would like to also display the store name. Is there an equivalent which would display the store name, something like {{store name=""}}? ({{store name=""}} doesn't work btw) I don't have access to the .php files so would like to know if this is possible without access. If not, then I can request changes to the .php,

Ruby: const_set outside block?

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问题 I want to mock a class with Ruby. How do I write a method that will take care of the boilerplate code? The following code: module Mailgun end module Acani def self.mock_mailgun(mock) temp = Mailgun const_set(:Mailgun, mock) p Mailgun yield ensure const_set(:Mailgun, temp) end end Acani.mock_mailgun('mock') { p Mailgun } prints: "mock" Mailgun What's going on here? Why is Mailgun its original value inside the block? Does this have to do with Ruby bindings? Ruby version: 2.1.1p76 回答1: Try

NSMutableArray instance used in a block

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问题 The following code snippet uses GCD to compute a set of integers and store them in an array. factArray = {1!, 2!, ... n!} where k! designates factorial(k)=k*(k-1)*...*2*1. I wonder why I can add objects to the factArray variable (instance of NSMutableArray) inside the block though factArray isn't declared with the __block qualifier. NSUInteger n = 10; NSMutableArray *factArray = [[NSMutableArray alloc] initWithCapacity:n]; __block NSUInteger temp = 1; dispatch_apply(n, dispatch_get_global

Hadoop分布式文件系统之HDFS

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转自： https://blog.csdn.net/bingduanlbd/article/details/51914550#t24 1. 介绍在现代的企业环境中，单机容量往往无法存储大量数据，需要跨机器存储。统一管理分布在集群上的文件系统称为分布式文件系统。而一旦在系统中，引入网络，就不可避免地引入了所有网络编程的复杂性，例如挑战之一是如果保证在节点不可用的时候数据不丢失。传统的网络文件系统（NFS）虽然也称为分布式文件系统，但是其存在一些限制。由于NFS中，文件是存储在单机上，因此无法提供可靠性保证，当很多客户端同时访问NFS Server时，很容易造成服务器压力，造成性能瓶颈。另外如果要对NFS中的文件中进行操作，需要首先同步到本地，这些修改在同步到服务端之前，其他客户端是不可见的。某种程度上，NFS不是一种典型的分布式系统，虽然它的文件的确放在远端（单一）的服务器上面。从NFS的协议栈可以看到，它事实上是一种VFS（操作系统对文件的一种抽象）实现。 HDFS，是Hadoop Distributed File System的简称，是Hadoop抽象文件系统的一种实现。Hadoop抽象文件系统可以与本地系统、Amazon S3等集成，甚至可以通过Web协议（webhsfs）来操作。HDFS的文件分布在集群机器上，同时提供副本进行容错及可靠性保证