chaining

问题 If i have promise = userService.updateUser($stateParams.userId, req); promise.then( function(user) { logger.logSuccess('Updated user'); $scope.resetForm(); WizardHandler.wizard().goTo(0); return user; }, function(error) { logger.logError('Ups an error has occurred'); console.error('error updating user: ' + error); } ); promise.then(function(user) { _.each(uploader.getNotUploadedItems(), function(item) { return item.formData.push({ id: user.id }); }); }); Then if the updateUser fails the log

问题 I have this code: jQuery('#flash').animate({opacity: 0.35}, 200) .animate({opacity: 0}, 200) .animate({opacity: 0.35}, 200) .animate({opacity: 0}, 200) .animate({opacity: 0.35}, 200) .animate({opacity: 0}, 600) and I'm not decided on how many times I want its state altered. Is there a way to chain animations programmatically instead having to add/remove chain elements by editing the animate chain? 回答1: No, you can't chain animations without editing the animation queue. If you want to chain a

问题 I'm trying to get the principles of doing jQuery-style function chaining straight in my head. By this I mean: var e = f1('test').f2().f3(); I have gotten one example to work, while another doesn't. I'll post those below. I always want to learn the first principle fundamentals of how something works so that I can build on top of it. Up to now, I've only had a cursory and loose understanding of how chaining works and I'm running into bugs that I can't troubleshoot intelligently. What I know:

问题 I'm having trouble understanding a basic concept of error handling with chaining promises. In order to learn the rules, I have written a simple example, guessing what the result will be. But unfortunatly it doesn't behave as I though it will. I have read multiple articles about the subject but perhaps can't I get details because of my poor english language. Anyway, here is my code : var promiseStart = $q.when("start"); var promise1 = promiseStart.then(function() { return Serviceforpromise1

问题 I have some functions written in C that I call from Haskell. These functions return IO (CInt) . Sometimes I want to run all of the functions regardless of what any of them return, and this is easy. For sake of example code, this is the general idea of what's happening currently: Prelude> let f x = print x >> return x Prelude> mapM_ f [0..5] 0 1 2 3 4 5 Prelude> I get my desired side effects, and I don't care about the results. But now I need to stop execution immediately after the first item

问题 I'd like to know how I could I thorw a "final" Exception , containing a detail message with all the detail messages of a number of chained exceptions. For example suppose a code like this: try { try { try { try { //Some error here } catch (Exception e) { throw new Exception("FIRST EXCEPTION", e); } } catch (Exception e) { throw new Exception("SECOND EXCEPTION", e); } } catch (Exception e) { throw new Exception("THIRD EXCEPTION", e); } } catch (Exception e) { String allMessages = //all the

问题 Normally, PowerShell commands can be chained with semicolons. The following opens 2 notepads: PS> notepad; notepad You can also chain a more complex statement: PS> Add-Type -AssemblyName System.IO.Compression; ` > $src = "C:\aFolder"; $zip="C:\my.zip"; ` > [io.compression.zipfile]::CreateFromDirectory($src, $zip) Chained PowerShell commands can also be called from a CMD command-line: C:\> powershell notepad; notepad This post describes a method to create a .Net 4.0 PowerShell prompt, even if

问题 I am curious why there is a difference in the argument evaluation order between chained static functions and member functions. From the answers at this question I can see it is unspecified what the argument evaluation order is between such chained function calls. Take for example the following snippet: #include <iostream> class test { public: static test& chain_s(test& t, int i) { std::cout << i << " "; return t; } test& chain(test& t, int i) { std::cout << i << " "; return *this; } }; int

问题 Is it possible to remove xml attributes from XSLT AND work with the resulting transform? In other words, I have the following XML: <?xml version="1.0" encoding="iso-8859-1"?> <?xml-stylesheet type="text/xsl" href="XML_TEST.xslt"?> <report xmlns="abc123"> <book> <page id="22"> </page> <page id="23"> </page> </book> </report> I know that I can use the following XSLT to strip the attributes: <xsl:template match ="@*" > <xsl:attribute name ="{local-name()}" > <xsl:value-of select ="." /> </xsl

问题 I want to make a function that add an item to my localStorage object. E.g.: alert(localStorage.getItem('names').addItem('Bill').getItem('names')); The first method is getItem which gets the item for localStorage objects... but addItem would be a custom function. This chain of functions would finally alert Bill. So, how would I make this function chain to localStorage? 回答1: This is possible if you create a wrapper/decorator object that makes chaining possible. This is how jQuery works for