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html - Why does flexbox stretch my image rather than retaining aspect ratio?

Flexbox has this behaviour where it stretches images to their natural height. In other words, if I have a flexbox ... >Paragraph</p> </div> See Question&Answers more detail:os...

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

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iphone - How to identify CAAnimation within the animationDidStop delegate?

I had a problem where I had a series of overlapping CATransition / CAAnimation sequences, all of which I needed ... delegate? Thanks, --Batgar See Question&Answers more detail:os...

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

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484 views

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javascript - How to use Select2 with JSON via Ajax request?

My Select2 3.4.5 is not working with JSON data. Here is my input box on HTML: <input class='form-control ... or is my JSON response is wrong? See Question&Answers more detail:os...

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

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iphone - iMessage Style Receding Keyboard in an iOS App

I've been wondering if it is possible to replicate the behavior of Apple's iOS5 keyboard in the ... orta/iMessage-Style-Receding-Keyboard See Question&Answers more detail:os...

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

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powershell - How do I get only directories using Get-ChildItem?

I'm using PowerShell 2.0 and I want to pipe out all the subdirectories of a certain path. The following command outputs ... be dir /b /ad /s See Question&Answers more detail:os...

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

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java - How to convert enum value to int?

I have a function which return a type int. However, I only have a value of the TAX enumeration. How can I cast ... here? // return (int)var; } See Question&Answers more detail:os...

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

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Use CSS to automatically add 'required field' asterisk to form inputs

What is a good way to overcome the unfortunate fact that this code will not work as desired: <div class= ... advantages of the impossible 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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macos - IntelliJ IDEA JDK configuration on Mac OS

I am using IntelliJ IDEA 10. Every time when I create a new project, it is asking me to choose JDK for this ... it and make it easy to use? See Question&Answers more detail:os...

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

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spring mvc - Which is better, return "ModelAndView" or "String" on spring3 controller

The way of return ModelAndView @RequestMapping(value = "/list", method = RequestMethod.GET) public ModelAndView list ... and what is difference? See Question&Answers more detail:os...

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

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linux - Run parallel multiple commands at once in the same terminal

I want to run a few commands, each of which doesn't quit until Ctrl-C is pressed. Is there something I can ... up a terminal for each command. See Question&Answers more detail:os...

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

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cocoa - How can I duplicate, or copy a Core Data Managed Object?

I have a managed object ("A") that contains various attributes and types of relationships, and its ... Core Data documentation. TIA! See Question&Answers more detail:os...

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

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Why does Git use a cryptographic hash function?

Why does Git use SHA-1, a cryptographic hash function, instead of a faster non-cryptographic hash function? ... sequential numbers for commits. See Question&Answers more detail:os...

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

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docker - Am I trying to connect to a TLS-enabled daemon without TLS?

I'm trying to learn about Docker, but I keep getting cryptic (to me) error messages. Possibly the simplest ... that example, or in general. See Question&Answers more detail:os...

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

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python - How to filter objects for count annotation in Django?

Consider simple Django models Event and Participant: class Event(models.Model): title = models.CharField(max_length= ... accepted answer below. See Question&Answers more detail:os...

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

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mount point - docker mounting volumes on host

I have successfully been able to share folders between a docker container with volumes using docker run -v /host/path ... the -v and VOLUME. See Question&Answers more detail:os...

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

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java - Difference between UTF-8 and UTF-16?

Difference between UTF-8 and UTF-16? Why do we need these? MessageDigest md = MessageDigest.getInstance("SHA-256"); ... ] digest = md.digest(); See Question&Answers more detail:os...

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

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iphone - What are some methods to debug Javascript inside of a UIWebView?

I'm trying to figure out why something with Javascript isn't working inside of a UIWebView. To my knowledge, ... the old-school alert method? See Question&Answers more detail:os...

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

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python - How do I execute inserts and updates in an Alembic upgrade script?

I need to alter data during an Alembic upgrade. I currently have a 'players' table in a first revision: ... updates inside the upgrade script? See Question&Answers more detail:os...

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

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157 views

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android - Failure [INSTALL_FAILED_ALREADY_EXISTS] when I tried to update my application

when I tried to update my applcation with new version that has same signature as previous one, shows above error. What I am missing? See Question&Answers more detail:os...

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

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java - Maven: How to include jars, which are not available in reps into a J2EE project?

in my J2EE project I've a couple of dependencies, which are not available in any Maven repository, because ... create my own Maven repository. See Question&Answers more detail:os...

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

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622 views

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linux - Using gdb to single-step assembly code outside specified executable causes error "cannot find bounds of current function"

I'm outside gdb's target executable and I don't even have a stack that corresponds to that target. I want ... will change every time I reboot.) See Question&Answers more detail:os...

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

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r - dplyr on data.table, am I really using data.table?

If I use dplyr syntax on top of a datatable, do I get all the speed benefits of datatable while still using the ... =cut ] [ order(-Count) ] See Question&Answers more detail:os...

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

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Android - Expandable TextView with Animation

I have a TextView which firstly shows a small portion of a long text. The user can press a "see more" button ... Can someone help me with this? See Question&Answers more detail:os...

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

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objective c - NSURLConnection sendAsynchronousRequest:queue:completionHandler: making multiple requests in a row?

I have been using NSURLConnection's sendAsynchronousRequest:queue:completionHandler: method which is great. But, I ... great asychronous method? See Question&Answers more detail:os...

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

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html - How to make type="number" to positive numbers only

currently I have the following code <input type="number" /> it comes out to something like this The little selector ... to using type="text"? See Question&Answers more detail:os...

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

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402 views

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sql - Disable all table constraints in Oracle

How can I disable all table constrains in Oracle with a single command? This can be either for a single table, a ... tables, or for all tables. See Question&Answers more detail:os...

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

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667 views

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algorithm - Undo/Redo implementation

Give me some thoughts how to implement undo/redo functionality - like we have in text editors. What algorithms should ... I may read. thanks. See Question&Answers more detail:os...

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

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814 views

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getattr - How do I override __getattr__ in Python without breaking the default behavior?

I want to override the __getattr__ method on a class to do something fancy but I don't want to break the default ... the correct way to do this? See Question&Answers more detail:os...

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

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