ktx 1.0.9

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The KTX Library provides a comprehensive set of tools for managing collections.

KTX #

pub

The KTX Library provides a comprehensive set of tools for managing collections – groups of a variable number of items (possibly zero) that share significance to the problem being solved and are operated upon commonly.

Getting Started #

associateBy is an operation allows associate the list items with the given key.

final List<User> users = [
    User(id: 1, firstName: "Dmytro", lastName: "Glynskyi"),
    User(id: 2, firstName: "Vladimir", lastName: "Zelenskyi")
];
final Map<int, User> mappedUsers = users
    .associateBy((user) => user.id);

mapToList returns a list containing the results of applying the given [transform] function.

final Map<int, User> users = {
  1: User(firstName: "Dmytro", lastName: "Glynskyi"),
  2: User(firstName: "Vladimir", lastName: "Zelenskyi")
};
final List<String> userName = users
    .mapToList((key, user) => user.firstName);

sortBy sorts elements in the list in-place according to natural sort order of the value returned by specified [selector] function.

final List<User> users = [
    User(id: 1, firstName: "Vladimir", lastName: "Glynskyi"),
    User(id: 2, firstName: "Vladimir", lastName: "Zelenskyi")
];
final List<User> sortedByNameUsers = users
    .sortBy((user) => user.firstName);

groupBy groups elements of the original collection by the key returned by the given [keySelector] function applied to each element and returns a map where each group key is associated with a list of corresponding elements.

final List<User> users = [
    User(id: 1, firstName: "Vladimir", lastName: "Glynskyi"),
    User(id: 2, firstName: "Vladimir", lastName: "Zelenskyi")
];
final Map<String, List<User>> groupedUsers = users
    .groupBy((user) => user.firstName);
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Publisher

glynskyi.com

The KTX Library provides a comprehensive set of tools for managing collections.

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Documentation

API reference

License

MIT (LICENSE)

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