Features

Getting started 🎉

dependencies:  nullx:^latest_version

Collections

import'package:nullx/nullx.dart';voidmain() {final list= [1,null,3,null];  list.mapNonNull((item)=> item*2);// prints: [2, 6]}

import'package:nullx/nullx.dart';voidmain() {final list= [1,null,3,null];  list.mapNonNullIndexed((item, index)=> item* index);// prints: [0, 6]}

import'package:nullx/nullx.dart';voidmain() {finalList<int>? nullableList= [1,2,3];  nullableList.whatIfNotNullOrEmpty(    (list)=>print(list),// whatIf    ()=>print('List is null or empty'),// whatIfNot  );// prints: [1, 2, 3]}

import'package:nullx/nullx.dart';voidmain() {List<int>? nullableList= [1,2,3];print(nullableList.isNullOrEmpty);// prints: false  nullableList=null;print(nullableList.isNullOrEmpty);// prints: true  nullableList= [];print(nullableList.isNullOrEmpty);// prints: true}

Types

import'package:nullx/nullx.dart';voidmain() {constString? nullableString='example';unwrapped(nullableString, (value) {});finalList<String?> strings= [null,'one',null,'two',null];  strings.map((s)=> s.letNonNull((s)=> s.length)).whereType<int>().toList();}

import'package:nullx/nullx.dart';voidmain() {constint? nullableInt=10;final resultInt= nullableInt.letNonNull((value)=> value*2);// prints: 2}

import'package:nullx/nullx.dart';voidmain() {constint userAge=20;executeIf(    ()=> userAge>=18,    onConditionMet: () {// prints 'You are an adult.'    },    onConditionNotMet: () {// prints 'You are not an adult.'    },  );}

import'package:nullx/nullx.dart';voidmain() {var userAge=20;final result=executeIfAs<String>(    ()=> userAge>=18,    onConditionMet: ()=>'You are an adult.',    onConditionNotMet: ()=>'You are not an adult.',  );}

import'package:nullx/nullx.dart';voidmain() {voidprintValue(String value) {// prints 'The value is: $value'    }notEmpty(nullableString, printValue);}

import'package:nullx/nullx.dart';voidmain() {constString? nullableString='example';unwrapped(nullableString, (value) {});// prints: 'example'}

import'package:nullx/nullx.dart';voidmain() {var nullableString='Hello';    nullableString.notEmpty((item)=>print(item));// prints: Hello}

import'package:nullx/nullx.dart';voidmain() {constint userAge=20;// Unwraps the nullable string and performs an operation on itcallWhen(    condition: ()=> userAge>=18,    onMet: () {// prints 'You are an adult.'    },    onNotMet: () {// prints 'You are not an adult.'    },  );}

import'package:nullx/nullx.dart';voidmain() {constint? nullableInt=null;    nullableInt.orZero;// Outputs: 0    nullableInt.or(defaultValue:5);// Outputs: 5constdouble? nullableDouble=null;    nullableDouble.orZero;// Outputs: 0.0    nullableDouble.or(defaultValue:5.5);// Outputs: 5.5constbool? nullableBool=null;    nullableBool.orFalse;// Outputs: false    nullableBool.or(defaultValue:true);// Outputs: true}

voidmain() {finalMap<String,int>? nullableMap= {'a':1,'b':2};print(nullableMap.isNullOrEmpty);// falseprint(nullableMap.getOrElse('c',0));// 0    nullableMap.putIfAbsentOrElse('c',3);// {a: 1, b: 2, c: 3}    nullableMap.updateValue('a', (value)=> value!+10);// {a: 11, b: 2, c: 3}final filteredMap= nullableMap.filter((entry)=> entry.value>2);print(filteredMap);// {a: 11, c: 3}}

Contributing

License

Copyright 2024 Oleksii ShtankoLicensed under the Apache License, Version 2.0 (the "License");you may not use this file except in compliance with the License.You may obtain a copy of the License at   http://www.apache.org/licenses/LICENSE-2.0Unless required by applicable law or agreed to in writing, softwaredistributed under the License is distributed on an "AS IS" BASIS,WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.See the License for the specific language governing permissions andlimitations under the License.