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Input:
[[-1,-1,2],[-1,0,1],[-1,-1,2],[-1,0,1],[-1,-1,2],[-1,0,1],[-1,0,1]] The output I want:
[[-1,-1,2],[-1,0,1]] Any other ideas except this one?
Thanks
278
Use the filter() method: The filter() method creates a new array of elements that pass the condition we provide. It will include only those elements for which true is returned. We can remove duplicate values from the array by simply adjusting our condition.
To prevent adding duplicates to an array:Use the Array. includes() method to check if the value is not present in the array. If the value is not present, add it to the array using the push() method. The array will not contain any duplicate values.
You won't really get around stringifying the arrays, as that's the simplest (and reasonably fast) way to compare them by value. So I'd go for
Array.from(new Set(input.map(JSON.stringify)), JSON.parse) See also Remove Duplicates from JavaScript Array for other approaches, though most of them will require two values to be comparable by ===.
131
d.filter(( t={}, a=> !(t[a]=a in t) )); I assume your input data are in array d. Explanation here.
let d = [[-1,-1,2],[-1,0,1],[-1,-1,2],[-1,0,1],[-1,-1,2],[-1,0,1],[-1,0,1]]; var r = d.filter((t={},a=>!(t[a]=a in t))); console.log(JSON.stringify(r));If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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