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Understanding exactly when a data.table is a reference to (vs a copy of) another data.table
I'm having a little trouble understanding the pass-by-reference properties of data.table . Some operations seem to 'break' the reference, and I'd like to understand exactly what's happening.
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How to convert a PNG image to a SVG? [closed]
How to convert a PNG image to a SVG?
15 Answers
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Why use apparently meaningless do-while and if-else statements in macros?
In many C/C++ macros I'm seeing the code of the macro wrapped in what seems like a meaningless do while loop. Here are examples.
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What is this operator in MySQL?
I'm working on code written by a previous developer and in a query it says,
9 Answers
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“is” operator behaves unexpectedly with integers
Why does the following behave unexpectedly in Python?
11 Answers
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Git rebase: conflicts keep blocking progress
I have a git branch (called v4), that was made from master just yesterday. There were a couple of changes to master, that I want to get into v4. So, in v4, I tried to do a rebase from master, and one file keeps screwing things up: a one-line text file, that contains the version number. This file ...
Getting a slice of keys from a map
Is there any simpler/nicer way of getting a slice of keys from a map in Go?
6 Answers
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Random number from a range in a Bash Script
I need to generate a random port number between 2000-65000 from a shell script. The problem is $RANDOM is a 15-bit number, so I'm stuck!
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How to search for a part of a word with ElasticSearch
I've recently started using ElasticSearch and I can't seem to make it search for a part of a word.
10 Answers
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private final static attribute vs private final attribute
In Java, what's the difference between:
22 Answers
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