How to convert list<String> into String in Dart without iteration?
38,918
Solution 1
join
is a method of the List class, rather than String:
List<String> yourList = ["20", "3005", "2"];
// To test that the above the above
yourList.join() == '2030052'; // true
yourList.join(',') == '20,3005,2'; // true, with "," delimiter
Solution 2
This might not be the best solution, but you can reduce a collection to a single value by iteratively combining elements of the collection using the reduce method in Dart Lists.
String nums = numsList.reduce((value, element) => value + ',' + element);
You have to remember that, the iterable must have at least one element. If it has only one element, that element is returned.
Comments
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Haikel almost 2 years
Is there a method in Dart like the
String.join()
method in Java & c#?input:
nums: ["20", "3005", "2"]
output:
nums = "2030052"
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zerkms over 6 years
yourList.join()
? -
Mohamed Dernoun about 4 years@zerkms yes this do the job and return a String
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zerkms about 4 years@MohamedDernoun it was a comment to point out to the typo Mike made which they fixed.
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Al Foиce ѫ almost 3 yearsWhile this code may answer the question, providing additional context regarding why and/or how this code answers the question improves its long-term value.