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Read an Excel file directly from a R script
How can I read an Excel file directly into R? Or should I first export the data to a text- or CSV file and import that file into R?
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Double vs. BigDecimal?
I have to calculate some floating point variables and my colleague suggest me to use BigDecimal instead of double since it will be more precise. But I want to know what it is and how to make most out of BigDecimal ?
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How to Select Every Row Where Column Value is NOT Distinct
I need to run a select statement that returns all rows where the value of a column is not distinct (e.g. EmailAddress).
7 A...
How do I start PowerShell from Windows Explorer?
Is there a way to start PowerShell in a specific folder from Windows Explorer, e.g. to right-click in a folder and have an option like "Open PowerShell in this Folder"?
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What is the difference between call and apply?
What is the difference between using call and apply to invoke a function?
24 Answers
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How do I list all the columns in a table?
For the various popular database systems, how do you list all the columns in a table?
12 Answers
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How to prevent SIGPIPEs (or handle them properly)
I have a small server program that accepts connections on a TCP or local UNIX socket, reads a simple command and, depending on the command, sends a reply. The problem is that the client may have no interest in the answer sometimes and exits early, so writing to that socket will cause a SIGPIPE and m...
How to call Android contacts list?
I'm making an Android app, and need to call the phone's contact list. I need to call the contacts list function, pick a contact, then return to my app with the contact's name. Here's the code I got on the internet, but it doesnt work.
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Dump Mongo Collection into JSON format
Is there any way to dump mongo collection into json format? Either on the shell or using java driver.I am looking for the one with best performance.
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