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javascript - Parse request.object.get("KEY") always returns undefined

I have a strange problem over here. I have a project built with Parse.com as a backend (using cloudcode to ... , it looses all its fields. See Question&Answers more detail:os...

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

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swift - Projecting the ARKit face tracking 3D mesh to 2D image coordinates

I am collecting face mesh 3D vertices using ARKit. I have read: Mapping image onto 3D face mesh and ... suggestions? Thanks in advance! See Question&Answers more detail:os...

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r - Ridge regression with `glmnet` gives different coefficients than what I compute by "textbook definition"?

I am running Ridge regression with the use of glmnet R package. I noticed that the coefficients I obtain from glmnet:: ... .DEF, col = "red") See Question&Answers more detail:os...

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xcode - iOS/macOS app distribution failed while using framework after upgrading Xcode12 and macOS BigSur

We are unable to distribute our sample app which uses our framework as well as our users can't. While ... help is greatly appreciated. Thanks. See Question&Answers more detail:os...

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Best practice for using $rootscope in an Angularjs application?

We have a large Angularjs 1.6 application that has $rootscope scattered throughout the app in over 200 places in ... in the Angularjs docs. See Question&Answers more detail:os...

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python - Matplotlib FuncAnimation only draws one frame

I am trying to do an animation using the FuncAnimation module, but my code only produces one frame and then stops. ... , blit=True) plt.show() See Question&Answers more detail:os...

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swing - Pass variables to ActionListener in Java

I have something like the code below: for(int i=0;i<10;i++){ button=new JButton(buttons[i]); button. ... . How can I pass the variable? See Question&Answers more detail:os...

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sql server - SQL to find first non-numeric character in a string

I inherited a table with identifiers in a format [nonnumericprefix][number]. For example (ABC123; R2D2456778; etc). I ... I'd post it here. See Question&Answers more detail:os...

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c# - GetSystemMetrics() returns different results for .NET 4.5 & .NET 4.0

During a .NET 4.0 -> .NET 4.5 application migration process I've discovered an extremely strange ... short system description in comments. See Question&Answers more detail:os...

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python 2.7 - Why doesn't chained (interval) comparison work on numpy arrays?

a < b < c is an chained expression in Python, and it looks like it works on objects with appropriate comparison operators ... a.any() or a.all() See Question&Answers more detail:os...

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swift - How do you use the appropriate color class for the current platform?

I'm trying to share my Scene Kit code across iOS and OS X, but the API calls that accept colors (and ... in Swift without duplicating the code? See Question&Answers more detail:os...

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python - Accessing returned values from a function, by another function

I'm kinda new to programming in general, just started to really get into python. And I'm working on a number ... So thanks for any help! KiliBio See Question&Answers more detail:os...

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android firebase - get childrens count

Here is my Firebase data { "ques": { "Chemistry": {}, "Countries": {}, "Film": {}, "Geography": {}, "General ... }); So.. How to implement it?? See Question&Answers more detail:os...

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html - Do custom CSS properties use one leading dash or two?

#elem { -myCustom: 99; } OR #elem { --myCustom: 99; } I have seen both of the above used in ... getPropertyValue('-myCustom'); alert(value); See Question&Answers more detail:os...

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syntax - Why does white-space affect ruby function calls?

I get a syntax error with this code render json: { "what" => "created", "whatCreated" => "thing" ... after render_to_string breaks my rails app? See Question&Answers more detail:os...

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sql server - Save a spark RDD to the local file system using Java

I have a RDD that is generated using Spark. Now if I write this RDD to a csv file, I am provided with ... Any clarity needed, please let know. See Question&Answers more detail:os...

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Get container ID from Docker buildkit for interactive debugging

It's commonly known that you can run docker commit against a failed build process to take a snapshot of ... when using Docker BuildKit? See Question&Answers more detail:os...

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

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xml - Convert image (jpg) to base64 in Excel VBA?

I need to convert an image inside Excel (or through VBA) to base64 (in the end I will make XML output). How ... have any code that I can see? See Question&Answers more detail:os...

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How does a C-style struct with a bitfield get represented in a Rust #[repr(C)] struct?

I have a C struct defined as: struct my_c_s { u_char *ptr; unsigned flag_a:1; unsigned flag_b:1; int some_num ... pub flag_bits: ::libc::c_uint, See Question&Answers more detail:os...

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How do I make Sass work?

This might be a dumb question but I stumbled upon this awesome CodePen that I wanted to adjust and use. I ... it works just fine on CodePen? See Question&Answers more detail:os...

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java - How many objects are created

I was having a discussion about usage of Strings and StringBuffers in Java. How many objects are created in each ... 2 will create 4 objects. See Question&Answers more detail:os...

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Swift Array optional Type and subscripting (Beta 3)

I'm following the 2014 WWDC tutorial 408: Swift Playgrounds using XCode Beta 3 (30 minutes in). The Swift syntax ... integer array in this way? See Question&Answers more detail:os...

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javascript - Changing "src" attribute of <script>

Is it possible to change the "src" attribute of an existing <script> element using Jquery.attr()? It seemed like ... to make this work for me. See Question&Answers more detail:os...

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cordova - How to handle Push notification when application is resumed?

Trying to handled push Notification using PushPlugin. Following is my code. onNotificationGCM: function(e) { switch( ... this type of situation? See Question&Answers more detail:os...

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visualization - Matplotlib Colormap with two parameter

I am trying to represent two variables x and y on a map using colours. So far the best I can acheive ... in matplotlib that takes two variables? See Question&Answers more detail:os...

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url redirection - 301 redirect .htaccess

How do I 301 redirect, for example: a subdirectory /Blog/ to /blog/ with .htaccess? See Question&Answers more detail:os...

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selenium - How to Set capability for IE browser to run in Headless mode

I want to run the scripts in Headless mode for all the 3 browsers Chrome, Firefox & IE The following is the ... to execute in IE with options See Question&Answers more detail:os...

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Excel VBA: Enabling Macro Settings

I wrote a macro method to auto-size the columns in an Excel sheet upon opening the sheet. However, this ... macros with Excel VBA code? See Question&Answers more detail:os...

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

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