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c# - How do I get the color from a hexadecimal color code using .NET?

How can I get a color from a hexadecimal color code (e.g. #FFDFD991)? I am reading a file and am getting ... an inbuilt method in the framework to do this? Question&Answers:os...

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

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How to Define Callbacks in Android?

During the most recent Google IO, there was a presentation about implementing restful client applications. Unfortunately, ... on how to handle the return path. Question&Answers:os...

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

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c# - Random row from Linq to Sql

What is the best (and fastest) way to retrieve a random row using Linq to SQL when I have a condition, e.g. some field must be true? Question&Answers:os...

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

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Why is Singleton considered an anti-pattern?

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

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javascript - Unable to access JSON property with "-" dash

I am unable to retrieve a value from a json object when the string has a dash character: { "profile-id":1234, " ... urls, etc., that are passed as well. Help? Question&Answers:os...

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

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python - Groupby value counts on the dataframe pandas

I have the following dataframe: df = pd.DataFrame([ (1, 1, 'term1'), (1, 2, 'term2'), (1, 1, ... and not a dataframe. Anyway I can achieve this without looping? Question&Answers:os...

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

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linux - Argument list too long error for rm, cp, mv commands

I have several hundred PDFs under a directory in UNIX. The names of the PDFs are really long (approx. 60 chars). ... ? If yes, how to solve for these commands? Question&Answers:os...

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

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c++ - Why should I not include cpp files and instead use a header?

So I finished my first C++ programming assignment and received my grade. But according to the grading, I lost marks for ... did I do wrong, and why is it bad? Question&Answers:os...

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

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xml - Normalization in DOM parsing with java - how does it work?

I saw the line below in code for a DOM parser at this tutorial. doc.getDocumentElement().normalize(); Why do we ... needed? What happens if we don't normalize ? Question&Answers:os...

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

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java - What are all the escape characters?

I know some of the escape characters in Java, e.g. : Newline : Carriage return : Tab \ : Backslash ... Is there a complete list somewhere? Question&Answers:os...

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

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Python JSON serialize a Decimal object

I have a Decimal('3.9') as part of an object, and wish to encode this to a JSON string which should look ... is wrong, and will be a big waste of bandwidth. Question&Answers:os...

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

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java - Difference between Static methods and Instance methods

I was just reading over the text given to me in my textbook and I'm not really sure I understand what ... main simply references the method name, "factorial". Question&Answers:os...

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

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java - custom listview adapter getView method being called multiple times, and in no coherent order

I have a custom list adapter: class ResultsListAdapter extends ArrayAdapter<RecordItem> { in the overridden ' ... /RelativeLayout> Thank you for your time Question&Answers:os...

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

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javascript - How can I group data with an Angular filter?

I have a list of players which belong to a group each. How can I use a filter to list the users per ... George Paula team gamma Steve Scruath of the 5th sector Question&Answers:os...

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

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xcode - How can I deal with @objc inference deprecation with #selector() in Swift 4?

I'm trying to convert my project's source code from Swift 3 to Swift 4. One warning Xcode is giving me is ... 3 @objc inference in Swift 4 mode is deprecated? Question&Answers:os...

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

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javascript - How can I change an element's text without changing its child elements?

I'd like to update element's text dynamically: <div> **text to change** <someChild> text that should not ... new container for the text I need to change. Question&Answers:os...

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

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php - Increasing the maximum post size

There is a lot of data being submitted no file uploads and the $_SERVER['CONTENT_LENGTH'] is being exceeded. Can this be increased? Question&Answers:os...

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

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sql server - nvarchar concatenation / index / nvarchar(max) inexplicable behavior

I today ran into a really weird problem in SQL Server (both 2008R2 and 2012). I'm trying to build up a string using ... c, @d as d, @e as e, @f as f Question&Answers:os...

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

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The program doesn't stop on scanf("%c", &ch) line, why?

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

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data structures - How does a hash table work?

I'm looking for an explanation of how a hash table works - in plain English for a simpleton like me! For ... a general overview of how a hash table works. Question&Answers:os...

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

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syntax - SQL left join vs multiple tables on FROM line?

Most SQL dialects accept both the following queries: SELECT a.foo, b.foo FROM a, b WHERE a.x = b.x SELECT a ... the second syntax to the first (or vice versa)? Question&Answers:os...

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

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windows installer - How to add a WiX custom action that happens only on uninstall (via MSI)?

I would like to modify an MSI installer (created through WiX) to delete an entire directory on uninstall. I ... that will run a batch script on uninstall? Question&Answers:os...

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

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android - Send Email Intent

Intent intent = new Intent(Intent.ACTION_SEND); intent.setType("text/html"); intent.putExtra(Intent.EXTRA_EMAIL, ... Orkut etc. What code produces such dialog? Question&Answers:os...

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

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javascript - What does "./" (dot slash) refer to in terms of an HTML file path location?

I know ../ means go up a path, but what does ./ mean exactly? I was recently going through a tutorial and it seems ... just not use it if that's all it's doing? Question&Answers:os...

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

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c - How to make child process die after parent exits?

Suppose I have a process which spawns exactly one child process. Now when the parent process exits for ... Kill child process when parent process is killed Question&Answers:os...

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

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Why are exclamation marks used in Ruby methods?

In Ruby some methods have a question mark (?) that ask a question like include? that ask if the object in question ... ) where others don't? What does it mean? Question&Answers:os...

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

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javascript - How do I define global variables in CoffeeScript?

On Coffeescript.org: bawbag = (x, y) -> z = (x * y) bawbag(5, 10) would compile to: var bawbag; ... . What does 'attach them as properties on window' mean? Question&Answers:os...

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

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date - JavaScript seconds to time string with format hh:mm:ss

I want to convert a duration of time, i.e., number of seconds to colon-separated time string (hh:mm:ss) ... that does this in jQuery or just raw JavaScript? Question&Answers:os...

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

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