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Apache Spark: The number of cores vs. the number of executors
I'm trying to understand the relationship of the number of cores and the number of executors when running a Spark job on YARN.
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How do I execute a command and get the output of the command within C++ using POSIX?
I am looking for a way to get the output of a command when it is run from within a C++ program. I have looked at using the system() function, but that will just execute a command. Here's an example of what I'm looking for:
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When to use ref and when it is not necessary in C#
I have a object that is my in memory state of the program and also have some other worker functions that I pass the object to to modify the state. I have been passing it by ref to the worker functions. However I came across the following function.
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Why CancellationToken is separate from CancellationTokenSource?
I'm looking for a rationale of why .NET CancellationToken struct was introduced in addition to CancellationTokenSource class. I understand how the API is to be used, but want to also understand why it is designed that way.
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Tool for generating railroad diagram used on json.org [closed]
I love the syntax of railroad diagrams on json.org which are a graphical representation of the BNF language. I haven't found any tools that can produce results as eloquently.
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How do I fetch a single model in Backbone?
I have a Clock model in Backbone:
7 Answers
7
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How to replace master branch in Git, entirely, from another branch? [duplicate]
I have two branches in my Git repository:
5 Answers
5
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MySQL integer field is returned as string in PHP
I have a table field in a MySQL database:
14 Answers
14
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How to replace a set of tokens in a Java String?
I have the following template String: "Hello [Name] Please find attached [Invoice Number] which is due on [Due Date]" .
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decimal vs double! - Which one should I use and when? [duplicate]
I keep seeing people using doubles in C#. I know I read somewhere that doubles sometimes lose precision.
My question is when should a use a double and when should I use a decimal type?
Which type is suitable for money computations? (ie. greater than $100 million)
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