flutter pub add byte_flow基于插件公开信息、社区数据与项目使用情况整理的选型参考。
Byte Flow 是一个轻量级、无依赖的 Dart 库，提供列表和字符串的基本实用函数。设计简洁高效，为 Dart 核心类型增添便捷方法，且不引入外部依赖。非常适合希望在多平台数据操作任务中实现干净高效的代码改进的开发者。该库持续维护且开源，便于自定义和贡献。可通过 pub.dev 轻松集成到 Flutter 和 Dart 项目中。
以下为关联源码仓库的 README 原文快照，最新内容请访问源码仓库。
Byte flow is a pure dart , dependency less library that provides common utility functions for lists and strings .
dependencies:
byte_flow: ^1.0.0
After this run flutter pub get
Then import the library
import 'package:byte_flow/byte_flow.dart';
Byte flow contains helpful utility functions for lists and strings but it's main target is to provide developers rich set of list utilites .
First import the library like this
import 'package:byte_flow/byte_flow.dart' as _;
_.chunk(List list, [int size = 1])Creates an list of elements split into groups the length of size. If list can't be split evenly, the final chunk will be the remaining elements.
Example
_.chunk(['a', 'b', 'c', 'd'], 2);
// Returns ['a', 'b'],['c', 'd']
_.chunk(['a', 'b', 'c', 'd'], 3)
// Returns ['a', 'b', 'c'],['d']
_.slice(List list, [int start = 0, int end])Creates a slice of list from start up to, but not including, end.
Example
_.slice([1, 2, 3, 4], 2);
// Returns [3, 4]
_.compact(List list)Creates an list with all falsey values removed. The values false, null,0, "", and NaN are falsey.
Example
_.compact([0, 1, false, 2, '', 3]);
// Returns [1, 2, 3]
_.compact([1, 2, 'some data', 2, '', 3, false, null]);
// Returns [1, 2, 'some data', 2, 3]
_.drop(List list, [int n = 1])Creates a slice of list with n elements dropped from the beginning.
Example
_.drop([1, 2, 3]);
// Returns [2,3]
_.drop([1, 2, 3], 2);
// Returns [3]
_.drop([1, 2, 3], 5);
// Returns []
_.drop([1, 2, 3], 0);
// Returns [1, 2, 3]
_.dropRight(List list, [int n = 1])Creates a slice of list with n elements dropRightped from the beginning.
Example
_.dropRight([1, 2, 3])
// Returns [1,2]
_.dropRight([1, 2, 3], 2)
// Returns [1]
_.dropRight([1, 2, 3], 5)
// Returns []
_.dropRight([1, 2, 3], 0)
// Returns [1, 2, 3]
_.fill(List list, dynamic value, [int start = 0, int end])Fills elements of list with value from start up to, but not including, end.
Example
_.fill(List(3), 4);
// Returns [4, 4, 4]
_.findIndex(List list, dynamic element)This method uses dart's default List.indexOf()
Example
_.findIndex(["Jack", "Yash", "Adib", "Alex"], "Adib");
// Returns 2
_.findLastIndex(List list, dynamic element)This method finds the item in the list from right / last using dart's List.indexOf() method
Example
_.findLastIndex(["Jack", "Yash", "Adib", "Adib"], "Adib");
// Returns 0
_.head(List list)Finds the first element in the list Uses dart's List.first property
Example
_.head(["Dart", "Javascript", "Swift"]);
// Returns "Dart"
_.flatten(List list)Flatten a list , Credit goes to Justin Fagnani
Example
_.flatten([
[1, 2, 3],
['a', 'b', 'c'],
[true, false, true]
]);
// Returns [1, 2, 3, 'a', 'b', 'c', true, false, true]
_.pairs(List pairs)This method returns an map composed from key-value pairs.
Example
_.pairs([
['a', 1],
['b', 2]
]);
// Returns {'a': 1, 'b': 2}
Gets all but the last element of list.
Example
_.initial([1, 2, 3]);
// Returns [1, 2]
_.initial([1, 2, 3, 'a', 'b', 'c']);
// Returns [1, 2, 3, 'a', 'b']
_.map(List list, Function(dynamic element, int index, List list) iteratee)Creates an list of values by running each element of list thru iteratee. The iteratee is invoked with three arguments: (value, index, list).
Example
square(n, index, list) {
return n*n;
}
_.map([4, 8], square);
// Returns [16, 64]
_.map([4, 8], (n, index, list) {
return n * 0;
});
// Returns [0, 0]
_.intersect(List<List> arrays)Creates an list of unique values that are included in all given arrays
Example
final lists = [
[1, 2, 3],
[2, 4, 5],
[2, 8, 9]
];
_.intersect(lists);
// Returns [2]
_.join(List list, [String separator = ','])Converts all elements in list into a string separated by separator. Uses dart's List.join()
Example
_.join(['a', 'b', 'c'], '~');
// Returns 'a~b~c'
_.last(List list)Gets the last element of list. Uses dart's List.last property
Example
_.last(["Dart", "Javascript", "Swift"]);
// Returns "Swift"
_.nth(List list, int n)Gets the element at index n of list. If n is negative, the nth element from the end is returned.
Example
_.nth(['a', 'b', 'c', 'd'], 2);
// Returns 'c'
_.nth(['a', 'b', 'c', 'd'], -1);
// Returns 'd'
_.sortedIndex(List list, dynamic value)Uses a binary search to determine the lowest index at which value should be inserted into list in order to maintain its sort order. Returns the index at which value should be inserted into list.
Example
_.sortedIndex([30, 50], 60);
// Returns 2
_.sortedIndex([30, 50], 40);
// Returns 1
_.sortedIndex([30, 50], 30);
// Returns 0
_.tail(List list)Gets all but the first element of list.
Example
_.tail([1, 2, 3]);
// Returns [2, 3]
_.take(List list, [int n = 1])Creates a slice of list with n elements taken from the beginning. Uses dart's native List.take(n) method
Example
_.take([1, 2, 3], 2);
// Returns [1, 2]
_.takeRight(List list, [int n = 1])Creates a slice of list with n elements taken from the end.
Example
takeRight([1, 2, 3])
// => [3]
takeRight([1, 2, 3], 2)
// => [2, 3]
takeRight([1, 2, 3], 5)
// => [1, 2, 3]
takeRight([1, 2, 3], 0)
// => []
_.union(List<List> arrays)Creates an list of unique values, in order
Example
_.union([
[2],
[1, 2]
]);
// Returns [2, 1]
_.unzip(List list)This method Returns the new list of regrouped elements
Example
_.unzip([['a', 1, true], ['b', 2, false]]);
// Returns [['a', 'b'], [1, 2], [true, false]]
_.zip(List a, List b)Zips two arrays , Credit
Example
_.zip(['a', 'b', 'c'], [1, 2, 3]);
// Returns [['a', 1],['b', 2],['c', 3]]
_.duplicate(List list)Find duplicate items in an list .
Example
_.duplicate([10, 12, 9, 21, 1, 2, 10]);
// Returns [10]
Byte flow libraries string utility collection is poor but still under development . The following functions are stable
_.capitalize(String text)Capitalizes the given string
Example
_.capitalize("hello world !");
// Returns "Hello world !"
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