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ruby on rails - accepts_nested_attributes_for with find_or_create?

I'm using Rails' accepts_nested_attributes_for method with great success, but how can I have it not create new ... and associated with the new team record. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - How to write an async method with out parameter?

I want to write an async method with an out parameter, like this: public async void Method1() { int op; int ... op); } How do I do this in GetDataTaskAsync? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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url - How to create query parameters in Javascript?

Is there any way to create the query parameters for doing a GET request in JavaScript? Just like in Python ... creates a string like 'var1=value1&var2=value2'. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Redirect From Action Filter Attribute

What is the best way to do a redirect in an ActionFilterAttribute. I have an ActionFilterAttribute called ... method at this point would be fine. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Angular 2: import external js file into component

I'm going to import this d3gauge.js file into one of my angular2 component, memmon.component.ts file. import '../. ... as a result of .ensure can't be resolved. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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design patterns - What is this practice called in JavaScript?

When you wrap your JavaScript code in a function like this: (function(){ var field = ...; function doSomthing() ... of web pages. What is this practice called? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Calling outer class function from inner class

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asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Android - LinearLayout Horizontal with wrapping children

Is there a property to set for Android's LinearLayout that will enable it to properly wrap child controls? Meaning - ... line. Any idea how this can be fixed? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How do I force Django to ignore any caches and reload data?

I'm using the Django database models from a process that's not called from an HTTP request. The process is ... ? And how do I prevent it from happening? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - Add Image to UIAlertAction in UIAlertController

I have seen a couple screen shots of a UIAlertControllers with an image on the left of the row ... self presentViewController:view animated:YES completion:nil]; Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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vba - Download attachment from Outlook and Open in Excel

I'm trying to download and then open an Excel spreadsheet attachment in an Outlook email using VBA in Excel. ... msg2.Attachments(1).Filename End If End Sub Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Retrieving the inherited attribute names/values using Java Reflection

I've a Java object 'ChildObj' which is extended from 'ParentObj'. Now, if it is possible to retrieve all ... any way to retrieve the inherited attributes also? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Python - use list as function parameters

How can I use a Python list (e.g. params = ['a',3.4,None]) as parameters to a function, e.g.: def some_func(a_char,a_float,a_something): # do stuff Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Get pixel's RGB using PIL

Is it possible to get the RGB color of a pixel using PIL? I'm using this code: im = Image.open("image. ... function. I'd love some explanation. Thanks a lot. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How does a C++ reference look, memory-wise?

Given: int i = 42; int j = 43; int k = 44; By looking at the variables addresses we know that each ... SIZE]; // compiler error! array of references is illegal Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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What is the default access modifier in Java?

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asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Maven and adding JARs to system scope

I have a JAR in my Android project and I want it to be added to final APK. Okay, here I go: <dependency> <groupId ... APK there are no JARs. How do I fix that? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Implement paging (skip / take) functionality with this query

I have been trying to understand a little bit about how to implement custom paging in SQL, for instance reading ... no luck. Any ideas how to implement it? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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679 views

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image - Convert RGBA color to RGB

How to convert a RGBA color tuple, example (96, 96, 96, 202), to corresponding RGB color tuple? Edit ... similar to the RGBA tuple visually on white background. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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node.js - While loop with promises

What would be the idiomatic way to do something like a while loop with promises. So: do something if the condition still stands do ... 3 4 5 6 7 8 9 10 11 done Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Scrolling to element using webdriver?

I am still learning and in response to one of my questions: here, I was told to that it might be due ... to be separated into the command form mentioned above. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Fastest way to convert a dict's keys & values from `unicode` to `str`?

I'm receiving a dict from one "layer" of code upon which some calculations/modifications are performed before ... stay as their original type. Any thoughts? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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opencv - Computing camera pose with homography matrix based on 4 coplanar points

I have 4 coplanar points in a video (or image) representing a quad (not necessarily a square or rectangle) and ... and it seems to solve some problems as well. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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191 views

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javascript - Finding longest string in array

Is there a short way to find the longest string in a string array? Something like arr.Max(x => x.Length);? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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310 views

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ios - How do I get the color of a pixel in a UIImage with Swift?

I'm trying to get the color of a pixel in a UIImage with Swift, but it seems to always return 0. Here is the code ... g, blue: b, alpha: a) } Thanks in advance! Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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954 views

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networking - Asynchronous IO in Java?

What options for async io (socket-based) are there in java other then java.nio? Also does java.nio use threads ... "true" async io using a proper select call? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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560 views

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Why am I seeing net::ERR_CLEARTEXT_NOT_PERMITTED errors after upgrading to Cordova Android 8?

After upgrading to Cordova Android 8.0, I am seeing net::ERR_CLEARTEXT_NOT_PERMITTED errors when trying to connect to http ... that and how can I resolve this? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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637 views

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lambda - What is a 'SAM type' in Java?

Reading up on the Java-8 spec, I keep seeing references to 'SAM types'. I haven't been able to find a ... is an example scenario of when one might be used? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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