Optional | Java 8 Optional-like APIs for everyone

 by   MrHadiSatrio Java Version: v1.0.1 License: MIT

kandi X-RAY | Optional Summary

kandi X-RAY | Optional Summary

Optional is a Java library. Optional has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can download it from GitHub.

Only for API 24 (Nougat) and up. Support for primitive types. Yes, all of them except boolean. Only for int, double, and long. Support for functional use-cases. Yes, including filter(), flatMap(), etc.

            kandi-support Support

              Optional has a low active ecosystem.
              It has 32 star(s) with 1 fork(s). There are 2 watchers for this library.
              It had no major release in the last 12 months.
              There are 1 open issues and 4 have been closed. On average issues are closed in 0 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of Optional is v1.0.1

            kandi-Quality Quality

              Optional has 0 bugs and 0 code smells.

            kandi-Security Security

              Optional has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              Optional code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              Optional is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              Optional releases are available to install and integrate.
              Build file is available. You can build the component from source.
              Installation instructions are not available. Examples and code snippets are available.
              Optional saves you 744 person hours of effort in developing the same functionality from scratch.
              It has 1715 lines of code, 221 functions and 33 files.
              It has medium code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed Optional and discovered the below as its top functions. This is intended to give you an instant insight into Optional implemented functionality, and help decide if they suit your requirements.
            • Returns the value or the value if present
            • Returns the value associated with this Supplier
            • Returns the contained value or throws an exception if it is present
            • Returns the contained value if present
            • Returns the value that is present in this supplier
            • Returns the value if present or the other
            • Returns the contained value
            • Returns the contained value or throws an exception if it is not present
            • Returns the value that is present on this Supplier
            • Returns value if present otherwise returns the value
            • Returns the value of the Supplier if present
            • Returns the value if present or otherwise
            • Invokes the specified consumer if it is present
            • Invokes the specified value if present
            • Returns the value of this supplier or the one if present
            • Checks if the given object is equal to or not
            • Invokes the given function with the specified value if present
            • Checks if the given object is equal to the given value
            • Invokes the specified function if the value is present and if it is present invoke the provided function
            • Returns the contained value or throws an exception
            • Returns the contained value if present otherwise throws an exception
            • Checks if the given object is equal to the given one
            • Checks if two OptionalInts are equal
            • Checks if the given object is equal
            • Checks if the given object is equal to the given object
            • Returns the contained value if present or throws an exception
            Get all kandi verified functions for this library.

            Optional Key Features

            No Key Features are available at this moment for Optional.

            Optional Examples and Code Snippets

            No Code Snippets are available at this moment for Optional.

            Community Discussions


            How to make substring optional Kotlin regex
            Asked 2021-Jun-15 at 21:32

            I am practicing regular expressions in Kotlin and trying to start with a multiline string. However, I am not receiving any matches. I feel like I am doing it right and can't figure out the problem.

            Test lines:



            Answered 2021-Jun-15 at 21:32


            Create a DateTimeFormater with an Optional Section at Beginning
            Asked 2021-Jun-15 at 19:54

            I have timecodes with this structure hh:mm:ss.SSS for which i have a own Class, implementing the Temporal Interface. It has the custom Field TimecodeHour Field allowing values greater than 23 for hour. I want to parse with DateTimeFormatter. The hour value is optional (can be omitted, and hours can be greater than 24); as RegEx (\d*\d\d:)?\d\d:\d\d.\d\d\d

            For the purpose of this Question my custom Field can be replaced with the normal HOUR_OF_DAY Field.

            My current Formatter



            Answered 2021-Jun-11 at 11:06

            I think fundamentally the problem is that it gets stuck going down the wrong path. It sees a field of length 2, which we know is the minutes but it believes is the hours. Once it believes the optional section is present, when we know it's not, the whole thing is destined to fail.

            This is provable by changing the minimum hour length to 3.

            Source https://stackoverflow.com/questions/67935444


            Trying to Sorting the Loaded Column in Listbox from A to Z
            Asked 2021-Jun-15 at 18:37

            I have been trying to sort the Column values from A to Z which are populated in the List Box.

            I have tried with the following but it does not adjust it. Any help will be appreciated.



            Answered 2021-Jun-15 at 18:37
            Method 1: Sort Data in Cells

            You need to sort the range using the Range.Sort method

            Source https://stackoverflow.com/questions/67987530


            Preg_match is "ignoring" a capture group delimiter
            Asked 2021-Jun-15 at 17:46

            We have thousands of structured filenames stored in our database, and unfortunately many hundreds have been manually altered to names that do not follow our naming convention. Using regex, I'm trying to match the correct file names in order to identify all the misnamed ones. The files are all relative to a meeting agenda, and use the date, meeting type, Agenda Item#, and description in the name.

            Our naming convention is yyyymmdd_aa[_bbb]_ccccc.pdf where:

            • yyyymmdd is a date (and may optionally use underscores such as yyyy_mm_dd)
            • aa is a 2-3 character Meeting Type code
            • bbb is an optional Agenda Item
            • ccccc is a freeform variable length description of the file (alphanumeric only)

            Example filenames:



            Answered 2021-Jun-15 at 17:46

            The optional identifier ? is for the last thing, either a characters or group. So the expression ([a-z0-9]{1,3})_? makes the underscore optional, but not the preceding group. The solution is to move the underscore into the parenthesis.

            Source https://stackoverflow.com/questions/67990467


            Pusher Undefined property: stdClass::$channels in Laravel Lumen
            Asked 2021-Jun-15 at 16:42

            I'm making a POC with Lumen and Vue.JS. For now it just has to send a "hello world" message from the Lumen back-end to the Vue.JS front-end (which works). I have made an event which is triggered upon loading the page like this:



            Answered 2021-Jun-15 at 16:42

            Fix composer.json

            I have created an issue on the PHP package: https://github.com/pusher/pusher-http-php/issues/295

            It is true this version is broken, but the fix should be in the composer.json file. Mine looked like this:

            Source https://stackoverflow.com/questions/66624416


            Docstring for class functions that only adds/updates class attributes?
            Asked 2021-Jun-15 at 15:29

            I'm trying to follow the Google Style of docstrings, but I'm not sure how to document a function (and the class itself) when there's functions that add/supdates an attribute. Currently I have something like this:



            Answered 2021-Jun-09 at 00:25

            There is a general format that can be followed. Although in certain scenarios, it becomes necessary to break away from the traditional style, your situation seems to be fairly basic. Here is a PEP convention guide for docstrings in Python:


            Source https://stackoverflow.com/questions/67895839


            Terraform Optional Parameter for List of String
            Asked 2021-Jun-15 at 10:40

            Trying to implement Azure WAF policy and associate with http listener the code was working fine until I try to include a new optional parameter called http_listener_ids

            Tf code:



            Answered 2021-Jun-15 at 10:40


            Identity Experience Framework and social accounts
            Asked 2021-Jun-15 at 09:10

            I developed a policy, which allows to login with username and password (B2C user) or using the Microsoft account, connecting the AD as an OpenId Identiy provider. It works fine, but when I login with my Microsoft account, the email is not set:

            I guess I have to set something in the following snippet:



            Answered 2021-Jun-15 at 09:10


            Regex capture optional groups by delimiters
            Asked 2021-Jun-15 at 08:53

            I need to parse a string quote by quote text and @ author and # category delimiters. Author and category come in order, but are optional. Like this:



            Answered 2021-Jun-15 at 08:42

            Assuming the @ and # only appear at the end of string in front of the author or category, you can use

            Source https://stackoverflow.com/questions/67982711


            bundle exec jekyll serve: cannot load such file
            Asked 2021-Jun-15 at 08:37

            I am trying to contribute to a Github Page/Jekyll site and want to be able to visualise changes locally but when I run bundle exec jekyll serve but I get this output:



            Answered 2021-Feb-02 at 16:29

            I had the same problem and I found a workaround here at https://github.com/jekyll/jekyll/issues/8523

            Add gem "webrick" to the Gemfile in your website. Than run bundle install

            At this point you can run bundle exec jekyll serve

            For me it works!

            Source https://stackoverflow.com/questions/65989040

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install Optional

            You can download it from GitHub.
            You can use Optional like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the Optional component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .


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