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macos - How can I clear previous output in Terminal in Mac OS X?

I know the clear command that 'clears' the current screen, but it does this just by printing lots of newlines ... it even by scrolling up? See Question&Answers more detail:os...

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assembly - How to calculate time for an asm delay loop on x86 linux?

I was going through this link delay in assembly to add delay in assembly. I want to perform some experiment ... . Thank you in advance. See Question&Answers more detail:os...

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Purge or recreate a Ruby on Rails database

I have a dev Ruby on Rails database full of data. I want to delete everything and rebuild the database. I ... rake db:recreate Is this possible? See Question&Answers more detail:os...

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

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branch - Renaming branches remotely in Git

If there is a repository that I only have git:// access to (and would usually just push+pull), is there a ... do locally with git branch -m? See Question&Answers more detail:os...

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javascript - nodejs, multer, aws S3

How do i apply uuid and date so that the filename stored in my database and the filename stored in my ... until your node server restarts See Question&Answers more detail:os...

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backup - SQL Server: Database stuck in "Restoring" state

I backed up a database: BACKUP DATABASE MyDatabase TO DISK = 'MyDatabase.bak' WITH INIT -- ... SQL ServerMSSQL.1MSSQLDATAMyDatabase_log.LDF See Question&Answers more detail:os...

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excel - Is there an R function to reshape this data from long to wide?

How the data looks now: Coach ID | Student | score | --------------------------------- 1 ... anyway to reshape data from long to wide? Thanks! See Question&Answers more detail:os...

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Compare two files in Visual Studio

I saw the new comparison tool in Visual?Studio?2012 for comparing two files or two versions of a file. I ... Visual?Studio (but without TFS)? See Question&Answers more detail:os...

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syntax - What does the `forall` keyword in Haskell/GHC do?

I'm beginning to understand how the forall keyword is used in so-called "existential types" like this: data ShowBox ... it in a type signature. See Question&Answers more detail:os...

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Show current state of Jenkins build on GitHub repo

Is there a way to show the Jenkins build status on my project's GitHub Readme.md? I use Jenkins to run ... current master is in that state. See Question&Answers more detail:os...

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javascript - Why is the variable `closed` being logged as `false`, if I define it globally as `0`?

I know this must be really basic stuff but I don't understand how the scope is working. I want the closed ... onload functions, but I failed. See Question&Answers more detail:os...

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python - h5py not sticking to chunking specification?

Problem: I have existing netCDF4 files (about 5000 of them), (typically in shape 96x3712x3712) datapoints (float32). ... on behind the scenes... See Question&Answers more detail:os...

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android - How to change the text of a CheckBox in listview?

I know its a silly question but I am not able to get it done. I want to change the text of a ChekcBox ... ; } Please guide me through this. See Question&Answers more detail:os...

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How does C++ Preprocessors work?

I am currently looking at open source C++ projects to learn more about C++. One of the project I am look ... explain to me how this work? See Question&Answers more detail:os...

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tortoisesvn - Working copy XXX locked and cleanup failed in SVN

I get this error when I do an svn update: Working copy XXXXXXXX locked Please execute "Cleanup" command When I run ... I get out of this loop? See Question&Answers more detail:os...

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sublimetext2 - Indenting code in Sublime text 2?

In Visual Studio I can press Ctrl+K+D to indent everything so the code is structured nicely and readable. Is there ... Sublime 2 to do the same? See Question&Answers more detail:os...

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java - Moving JLabel to other JLabels - GUI

I'm trying to make a JLabel move across other JLabels, only 1 timer works right now. It is supposed to operate like a ... tf.setLocation(x2, y2); tf.getLocation(); } }); startTime...

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

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c - srand function is returning same values

Hey guys take a look at this program. /* The craps game, KN king page 218 */ #include <stdio.h> #include <time ... and run it to see what i mean 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 - How can I insert image in a sqlite database

I want to put an image from camera to database using this database code. What should be the code for the save ... data to in the same activity. See Question&Answers more detail:os...

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oop - Aspect Oriented Programming vs. Object-Oriented Programming

Like most developers here and in the entire world, I have been developing software systems using object-oriented ... somebody have the answer? See Question&Answers more detail:os...

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c# - simple calculation not working for some reason

Alright, I'm trying to calculate the percentage of two values. This should be really simple but for some weird ... 1; else return returnvalue; } 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 - Equalize the height of left and right div, prevent right div from going below left div

I have a HTML page with content divided into left and right part using CSS. The height of left content in smaller than ... /div> </body> </html> See Question&Answers more detail:os...

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mongodb - How do you query for "is not null" in Mongo?

I would like to execute a following query: db.mycollection.find(HAS IMAGE URL) What should be the correct syntax? See Question&Answers more detail:os...

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node.js - NodeJS / Express: what is "app.use"?

In the docs for the NodeJS express module, the example code has app.use(...). What is the use function and where is it defined? See Question&Answers more detail:os...

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How to name and retrieve a stash by name in git?

I was always under the impression that you could give a stash a name by doing git stash save stashname, which ... its actual stash number is. See Question&Answers more detail:os...

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javascript - How is AngularJS different from jQuery

I only know one js library and that is jQuery. But my other coders in the group are changing AngularJS as ... use jQuery stuff with AngularJS? 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 to get Django and ReactJS to work together?

New to Django and even newer to ReactJS. I have been looking into AngularJS and ReactJS, but decided on ReactJS. It ... ... Not the best reason. See Question&Answers more detail:os...

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How to set the font size in Emacs?

I also want to save the font size in my .emacs file. See Question&Answers more detail:os...

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

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