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exception handling - Which parts of Real World Haskell are now obsolete or considered bad practice?

In the chapter 19 of Real World Haskell a lot of the examples now fail due to the change of Control.Exception. ... as of today (Nov 2017) See Question&Answers more detail:os...

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

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What is the HEAD in git?

There seems to be a difference between the last commit, the HEAD and the state of the file I can see in my ... and what mistake should I avoid? See Question&Answers more detail:os...

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

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c++ - Why use #ifndef CLASS_H and #define CLASS_H in .h file but not in .cpp?

I have always seen people write class.h #ifndef CLASS_H #define CLASS_H //blah blah blah #endif The question is, why ... is in the class.cpp? See Question&Answers more detail:os...

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

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winapi - Windows 7 SDK installation failure

I seem to be completely unable to install the Windows 7 SDK onto my machine, and the only solution I've found on ... How do I fix this problem? See Question&Answers more detail:os...

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

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git - Merge up to a specific commit

I created a new branch named newbranch from the master branch in git. Now I have done some work and want ... ? git merge newbranch <commitid> See Question&Answers more detail:os...

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

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hyperlink - How to convert an address into a Google Maps Link (NOT MAP)

After looking (Googling) on the web for a while, I can find nothing that takes an address like: 1200 ... any useful information on 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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Which Visual C++ file types should be committed to version control?

Which Visual Studio Visual C++ file types should be committed to version control? In my project I have the ... an explanation what's what. See Question&Answers more detail:os...

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

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How do you push just a single Git branch (and no other branches)?

I am working on a local git repository. There are two branches, master and feature_x. I want to push feature_x ... push to master right now. See Question&Answers more detail:os...

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

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How do you run JavaScript script through the Terminal?

For instance, if you were to run a Python script you would type python filename.py or if you wanted to run a C ... you do this with .js files? See Question&Answers more detail:os...

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

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performance - Java compile speed vs Scala compile speed

I've been programming in Scala for a while and I like it but one thing I'm annoyed by is the time it takes ... scalac ever be as fast as javac. See Question&Answers more detail:os...

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

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scala - Akka Kill vs. Stop vs. Poison Pill?

Newbie question of Akka - I'm reading over Akka Essentials, could someone please explain the difference between Akka ... the other? Many 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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sql - MySQL OPTIMIZE all tables?

MySQL has an OPTIMIZE TABLE command which can be used to reclaim unused space in a MySQL install. Is there a ... d have to script up yourself? See Question&Answers more detail:os...

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

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MongoDB/NoSQL: Keeping Document Change History

A fairly common requirement in database applications is to track changes to one or more specific entities in a ... there a common solution? See Question&Answers more detail:os...

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

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autotools - What are Makefile.am and Makefile.in?

These two files are mostly seen in open source projects. What are they for, and how do they work? See Question&Answers more detail:os...

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

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c++ - What is Linux’s native GUI API?

Both Windows (Win32 API) and OS X (Cocoa) have their own APIs to handle windows, events and other OS stuff. ... platform. How can it be native? See Question&Answers more detail:os...

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

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Rails server says port already used, how to kill that process?

I'm on a mac, doing: rails server I get: 2010-12-17 12:35:15] INFO WEBrick 1.3.1 [2010-12-17 12:35: ... port, but I want to kill this process. See Question&Answers more detail:os...

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

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Unix shell script find out which directory the script file resides?

Basically I need to run the script with paths related to the shell script file location, how can I change ... where the script file resides? See Question&Answers more detail:os...

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

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775 views

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x86 - What is the difference between Trap and Interrupt?

What is the difference between Trap and Interrupt? If the terminology is different for different systems, then what do they mean on x86? See Question&Answers more detail:os...

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

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538 views

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machine learning - How does Apple find dates, times and addresses in emails?

In the iOS email client, when an email contains a date, time or location, the text becomes a hyperlink and ... to apply accomplish such task? See Question&Answers more detail:os...

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

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Ruby on Rails Callback, what is difference between :before_save and :before_create?

Could you explain in detail what the :before_save and :before_create Ruby on Rails callbacks are, and what ... :before_save or :before_create? See Question&Answers more detail:os...

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

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533 views

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compilation - Cross compile Go on OSX?

I am trying to cross-compile a go app on OSX to build binaries for windows and linux. I have read everything what I ... it can be done at all)? See Question&Answers more detail:os...

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

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architecture - Difference between a "coroutine" and a "thread"?

What are the differences between a "coroutine" and a "thread"? 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 - Find which version of package is installed with pip

Using pip, is it possible to figure out which version of a package is currently installed? I know about pip ... version I am currently using. See Question&Answers more detail:os...

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

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file - What are the pros and cons of parquet format compared to other formats?

Characteristics of Apache Parquet are : Self-describing Columnar format Language-independent In comparison to Avro, ... over the others? See Question&Answers more detail:os...

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

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Comparing Haskell's Snap and Yesod web frameworks

The two Haskell web frameworks in the news recently are Yesod (at 0.8) and Snap (at 0.4). It's ... there. How about sessions? Other features? See Question&Answers more detail:os...

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

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201 views

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Specification for a Functional Reactive Programming language

I am looking at messing around with creating a functional reactive framework at some point. I have ... reactive programming language? See Question&Answers more detail:os...

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

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742 views

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keyboard shortcuts - How do I search for files in Visual Studio Code?

I am used to Resharper where I can search for files, not the content, but the filename, which makes it quick to ... is there a shortcut for it? See Question&Answers more detail:os...

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

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373 views

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c# - Why is processing a sorted array slower than an unsorted array?

I have a list of 500000 randomly generated Tuple<long,long,string> objects on which I am performing a simple " ... 00:00:08.6027886 (Sorted) See Question&Answers more detail:os...

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

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