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R data formats: RData, Rda, Rds etc
What are the main differences between .RData, .Rda and .Rds files?
2 Answers
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datetime dtypes in pandas read_csv
I'm reading in a csv file with multiple datetime columns. I'd need to set the data types upon reading in the file, but datetimes appear to be a problem. For instance:
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How SID is different from Service name in Oracle tnsnames.ora
...process running on the machine). Oracle considers the "Database" to be the files.
Service Name = alias to an INSTANCE (or many instances). The main purpose of this is if you are running a cluster, the client can say "connect me to SALES.acme.com", the DBA can on the fly change the number of instanc...
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...they are safe to use in the URL (like a post slug) and also safe to use as file names. For example, when someone uploads a file I want to make sure that I remove all dangerous characters from the name.
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git - Your branch is ahead of 'origin/master' by 1 commit
...anch is ahead of 'origin/develop' by 1 commit." how exactly do I view that files were changed? git diff doesn't seem to do anything
– Tom
Sep 8 '16 at 23:01
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How to make Scroll From Source feature always enabled?
... from source" in IntelliJ IDEA so it is always on, meaning if you open any file it is automatically shown in Project view, likewise it is made in Eclipse?
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How to list of all the tables defined for the database when using active record?
...way, but here is how I solved my problem:
Dir["app/models/*.rb"].each do |file_path|
require file_path # Make sure that the model has been loaded.
basename = File.basename(file_path, File.extname(file_path))
clazz = basename.camelize.constantize
clazz.find(:all).each do |rec|
# I...
Advantages of Antlr (versus say, lex/yacc/bison) [closed]
...ce you have a conflict free grammar, you can let ANTLRworks parse an input file of your language and build a parse tree and AST for you and show the tree graphically in the IDE. This is a very big advantage because it can save you many hours of work: You will find conceptual errors in your language ...
What is the use for Task.FromResult in C#
...hanism. But if you wrote a caching mechanism for ... say .... downloading files, Task<File> GetFileAync( ), you could instantly return a file that is already in cache by using Task.FromResult(cachedFile), and the await would run synchronously, saving time by not having the thread switch.
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Horizontal ListView in Android?
...nd you need to set your minSdk to L. But you can copy all of the necessary files into your project and use them that way until L is officially out.
You can download the preview docs here.
Warning: The API for Recycler View may change and it may have bugs.
Updated
The source code for horizontal l...