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How do I use the includes method in lodash to check if an object is in the collection?
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The includes (formerly called contains and include) method compares objects by reference (or more precisely, with ===). Because the two object literals of {"b": 2} in your example represent different instances, they are not equal. Notice:
({"b": 2} === {"b": 2})
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Define: What is a HashSet?
... HashSet holds a set of objects, but in a way that it allows you to easily and quickly determine whether an object is already in the set or not. It does so by internally managing an array and storing the object using an index which is calculated from the hashcode of the object. Take a look here
Hash...
How to simplify a null-safe compareTo() implementation?
...od for a simple class such as this (to be able to use Collections.sort() and other goodies offered by the Java platform):
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Javascript: get package.json data in gulpfile.js
...thin the gulpfile.js; For instance, I want to get the homepage or the name and use it in a task.
4 Answers
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What's the best way to iterate over two or more containers simultaneously
...ften in your data, consider using another pattern which zips two sequences and produces a range of tuples, corresponding to the paired elements:
for (auto& [a, b] : zip(containerA, containerB)) {
a = b;
}
The implementation of zip is left as an exercise for the reader, but it follows easi...
What does [].forEach.call() do in JavaScript?
I was looking at some snippets of code, and I found multiple elements calling a function over a node list with a forEach applied to an empty array.
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Regular Expression to find a string included between two characters while EXCLUDING the delimiters
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Easy done:
(?<=\[)(.*?)(?=\])
Technically that's using lookaheads and lookbehinds. See Lookahead and Lookbehind Zero-Width Assertions. The pattern consists of:
is preceded by a [ that is not captured (lookbehind);
a non-greedy captured group. It's non-greedy to stop at the first ]; and
is...
Use git “log” command in another folder
...e folder B. Folder B is another git project (so log is different between A and B).
2 Answers
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Rails.env vs RAILS_ENV
... what env one is running in. What's preferred? Are they, for all intents and purposes equal?
5 Answers
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Configuring IntelliJ IDEA for unit testing with JUnit
I decided to try out IntelliJ this morning via the trial version and installed the JUnit plugin. I made a new Java project and I want to write a test case for it.
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