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I've always heard that in C you have to really watch how you manage memory. And I'm still beginning to ... to do some "memory management" ? 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 - What you can do with a data.frame that you can't with a data.table?

I just started using R, and came across data.table. I found it brilliant. A very naive question: Can ... syntax confusion between two packages? See Question&Answers more detail:os...

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

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node-websocket-server: possible to have multiple, separate "broadcasts" for a single node.js process?

I'd like to know if it's possible to broadcast on different websocket "connections" running from the same node- ... it to the next level. See Question&Answers more detail:os...

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

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go - How to get the directory of the currently running file?

In nodejs I use __dirname . What is the equivalent of this in Golang? I have googled and found out this ... idiomatic way to do in Golang? 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 - Rebasing and what does one mean by rebasing pushed commits

It is often said that, you should not rebase commits that you have already pushed. What could be meaning of that? See Question&Answers more detail:os...

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

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"Agreeing to the Xcode/iOS license requires admin privileges, please re-run as root via sudo." when using GCC

While attempting to compile my C program, running the following command: gcc pthread.c -o pthread Returns: Agreeing ... can 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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r - How do you delete a column by name in data.table?

To get rid of a column named "foo" in a data.frame, I can do: df <- df[-grep('foo', colnames(df)) ... a data.table object, this no longer works. 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 3.1 and Image Assets

I have put all my images for my admin theme in the assets folder within a folder called admin. Then I link ... served. Am I missing something? See Question&Answers more detail:os...

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

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Available iPhone Web Application JavaScript UI Library/Frameworks

I'm starting a web application that will target Mobile Safari on iPhone/iPod Touch. I'm evaluating the available ... iUI and UiUIKit. Thank you 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 can I get Eclipse to show .* files?

By default, Eclipse won't show my .htaccess file that I maintain in my project. It just shows an empty ... show up? No obvious preferences. See Question&Answers more detail:os...

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

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mysql - How to change the default collation of a table?

create table check2(f1 varchar(20),f2 varchar(20)); creates a table with the default collation latin1_general_ci; ... the alter table 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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Android - Adding at least one Activity with an ACTION-VIEW intent-filter after Updating SDK version 23

I am getting the following tool tip in AndroidManifest.xml: App is not indexable by Google Search; consider adding at ... explain why it is so? 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 can you determine how much disk space a particular MySQL table is taking up?

Is there a quick way to determine how much disk space a particular MySQL table is taking up? The table may be MyISAM or Innodb. 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++ Object Instantiation

I'm a C programmer trying to understand C++. Many tutorials demonstrate object instantiation using a snippet such as: ... out of scope? 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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github - Delete local Git branches after deleting them on the remote repo

I want to have my local and remote repositories always in sync in terms of branches. After a Pull Request review ... of the branch as well? See Question&Answers more detail:os...

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

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364 views

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python - What is the most efficient way to create a dictionary of two pandas Dataframe columns?

What is the most efficient way to organise the following pandas Dataframe: data = Position Letter 1 a 2 b 3 c 4 d 5 e into ... : 'd', 5 : 'e']? See Question&Answers more detail:os...

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

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plot - how to draw directed graphs using networkx in python?

I have some nodes coming from a script that I want to map on to a graph. In the below, I want to use ... in red color onto the second image. See Question&Answers more detail:os...

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

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522 views

1 answer

html - Change Bootstrap input focus blue glow

Does anyone know the how to change Bootstrap's input:focus? The blue glow that shows up when you click on an input field? See Question&Answers more detail:os...

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

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300 views

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python - SQLAlchemy: engine, connection and session difference

I use SQLAlchemy and there are at least three entities: engine, session and connection, which have execute method, ... performing such a 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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346 views

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sql - How to exclude rows that don't join with another table?

I have two tables, one has primary key other has it as a foreign key. I want to pull data from the primary ... that join together by that key. See Question&Answers more detail:os...

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

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252 views

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How do you write multiline strings in Go?

Does Go have anything similar to Python's multiline strings: """line 1 line 2 line 3""" If not, ... of writing strings spanning multiple lines? See Question&Answers more detail:os...

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

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519 views

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screen orientation - I want my android application to be only run in portrait mode?

I want my android application to be only run in portrait mode? How can I do that? See Question&Answers more detail:os...

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

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281 views

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python - How do you extract a column from a multi-dimensional array?

Does anybody know how to extract a column from a multi-dimensional array in Python? See Question&Answers more detail:os...

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

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335 views

1 answer

.NET Standard vs .NET Core

I have read about the difference between .NET Standard and .NET Core, but I really don't know what the ... What is the difference between them? See Question&Answers more detail:os...

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

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740 views

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git log - What's the difference between git reflog and log?

The man page says that log shows the commit logs and reflog manages reflog information. What exactly is reflog ... log seems far more detailed. See Question&Answers more detail:os...

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

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828 views

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shell - How to run a command in the background and get no output?

I wrote two shell scripts a.sh and b.sh. In a.sh and b.sh I have a infinite for loop and they print ... I want to hide the output in terminal. See Question&Answers more detail:os...

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

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413 views

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gitk - Viewing full version tree in git

I am using the command line version of Git and gitk. I want to see the full version tree, not just the ... checked out version. Is it 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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694 views

1 answer

amazon ec2 - EC2 Can't resize volume after increasing size

I have followed the steps for resizing an EC2 volume Stopped the instance Took a snapshot of the current volume ... in advance for your help See Question&Answers more detail:os...

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

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