This strategy, called 'code splitting', helps to increase performance of your application by reducing the size of the initial JS payload that must be fetched. To code split with Redux, we want to be able to dynamically add reducers to the store. However, Redux really only has a single root reducer function. May 10, 2019 In this article, we will see how we can create a table dynamically from any json (one level) using react js. All that we have to do is pass a json data as a property to the component and our. Object.keys(obj) Parameters obj The object of which the enumerable's own properties are to be returned. Return value. An array of strings that represent all the enumerable properties of the given object. Object.keys returns an array whose elements are strings corresponding to the enumerable properties found directly upon object. Jun 16, 2016  SCRIPT438: Object doesn't support property or method 'assign' swagger-ui.js, line 19177 character 9 The Swagger UI loads with all my endpoints but the security definitions have a problem so the 'Authorize' button doesn't show up.

JavaScript objects are used for two major purposes:

• As a hash map (or 'dictionary'), where keys can be dynamically added/removed and where values are of the same type.
• As a record, where fields are fixed (though still maybe sometimes optional) and where values can be of different types.

Correspondingly, BuckleScript works with JS objects in these 2 ways.

Hash Map Mode

Until recently, where JS finally got proper Map support, objects have been (ab)used as a map. If you use your JS object like this:

• might or might not add/remove arbitrary keys
• values might or might not be accessed using a dynamic/computed key
• values are all of the same type

Then use our Js.Dict (for 'dictionary') API to bind to that JS object! In this mode, you can do all the metaprogramming you're used to with JS objects: get all keys through Js.Dict.keys, get values through Js.Dict.values, etc.

Example

Output:

Design Decisions

You can see that under the hood, a Js.Dict is simply backed by a JS object. The entire API uses nothing but ordinary BuckleScript externals and wrappers, so the whole API mostly disappears after compilation. It is very convenient when converting files over from JS to BuckleScript.

Records as Objects

Note: Requires BuckleScript >= v7

In BuckleScript, records are directly compiled into JS objects with the same shape (same attribute names).As long as your record doesn't contain any BS specific data structures (variants, lists), it will almost alwayscompile to idiomatic JS (this includes nested records etc.):

will be compiled into:

Please note:

• You will still be required to transform variants and lists, so for seamlessinterop, make sure to only use common datatypes, such as array, string, int, float, etc.Alternatively you can use genType todo automatic convertions between JS <-> BuckleScript values as well.
• None (option) values are converted to undefined, so if your JS codedistincts between null and undefined, use Js.Nullable.t instead

Rename fields - [bs.as]

There are often situations where specific record attributes need to have a different name than then resulting JS object.The most prominent example would include names like type, which are often used for 'Action' based patterns in JS, but cannotbe expressed in BuckleScript, since type is a keyword.

To work around that, you can use the [@bs.as] attribute to change the target name within the resulting JS object:

will be compiled to:

Mutable fields

You can also use the mutable keyword to do your side-effectual work:

which will translate cleanly to:

Abstract Record Mode

Note: For BuckleScript >= v7, we recommend using the plain Record as Objects mechanic.This feature might still be useful for certain scenarios, but the ergonomics might be worse

If your JS object:

• has a known, fixed set of fields
• might or might not contain values of different types

Then you're really using it like a 'record' in most other languages. For example, think of the difference of use-case and intent between the object {'John': 10, 'Allison': 20, 'Jimmy': 15} and {name: 'John', age: 10, job: 'CEO'}. The former case would be the aforementioned 'hash map mode'. The latter would be 'abstract record mode', which in BuckleScript is modeled with the bs.deriving abstract feature:

Note: the person type is not a record! It's a record-looking type that uses the record's syntax and type-checking. The bs.deriving abstract annotation turns it into an 'abstract type' (aka you don't know what the actual value's shape).

Creation

You don't have to bind to an existing person object from the JS side. You can also create such person JS object from BuckleScript's side.

Since bs.deriving abstract turns the above person record into an abstract type, you can't directly create a person record as you would usually. This doesn't work: {name: 'Joe', age: 20, job: 'teacher'}.

Instead, you'd use the creation function of the same name as the record type, implicitly generated by the bs.deriving abstract annotation:

Output:

Look ma, no runtime cost!

Rename Fields

Sometimes you might be binding to a JS object with field names that are invalid in BuckleScript/Reason. Two examples would be {type: 'foo'} (reserved keyword in BS/Reason) and {'aria-checked': true}. Choose a valid field name then use [@bs.as] to circumvent this:

Output:

Optional Labels

You can omit fields during the creation of the object:

Note that the [@bs.optional] tag turned the name field optional. Merely typing name as option(string) wouldn't work.

Note: now that your creation function contains optional fields, we mandate an unlabeled () at the end to indicate that you've finished applying the function.

Accessors

Again, since bs.deriving abstract hides the actual record shape, you can't access a field using e.g. joe.age. We remediate this by generating getter and setters.

Read

One getter function is generated per bs.deriving abstract record type field. In the above example, you'd get 3 functions: nameGet, ageGet, jobGet. They take in a person value and return string, int, string respectively:

Alternatively, you can use the Pipe First feature in a later section for a nicer-looking access syntax:

If you prefer shorter names for the getter functions, we also support a 'light' setting:

The getter functions will now have the same names as the object fields themselves.

Write

A bs.deriving abstract value is immutable by default. To mutate such value, you need to first mark one of the abstract record field as mutable, the same way you'd mark a normal record as mutable:

Then, a setter of the name ageSet will be generated. Use it like so:

Alternatively, with the Pipe First syntax:

Methods

You can attach arbitrary methods onto a type (any type, as a matter of fact. Not just bs.deriving abstract record types). See Object Method in the function section later.

Tips & Tricks

You can leverage bs.deriving abstract for finer-grained access control.

Mutability

You can mark a field as mutable in the implementation (ml/re) file, while hiding such mutability in the interface file:

Tada! Now you can mutate inside your own file as much as you want, and prevent others from doing so!

Hide the Creation Function

Mark the record as private to disable the creation function:

The accessors are still there, but you can no longer create such data structure. Great for binding to a JS object while preventing others from creating more such object!

Use submodules to prevent naming collisions and binding shadowing

Oftentimes you will have multiple abstract types with similar attributes. SinceBuckleScript will expand all abstract getter, setter and creation functions in thesame scope where the type is defined, you will eventually run into value shadowing problems.

For example:

To get around this issue, you can use modules to group a type with its relatedfunctions and later use them via local open statements:

The administration panel can be customized according to your needs, so you can make it reflect your identity.

/generate-ssh-key-linux-gitlab.html. WARNING

To apply your changes you need to rebuild your admin panel

# Change access URL

By default, the administration panel is exposed via http://localhost:1337/admin. However, for security reasons, you can easily update this path.

Path —./config/environment/**/server.json.

The panel will be available through http://localhost:1337/dashboard with the configurations above.

# Change the host

Cod uo cd key generator. By default, the administration panel client host name is localhost. However, you can change this setting by updating the admin configuration:

Path —./config/environment/**/server.json.

# Development mode

To enable the front-end development mode you need to start your application using the --watch-admin flag.

With this option you can do the following:

# Customize the strapi-admin package

All files added in my-app/admin/src/ will either be replaced or added

Example: Changing the available locales of your application

Path --my-app/admin/src/translations/index.js

Path --my-app/admin/src/i18n.js

TIP

With this modification only English and French will be available in your admin

# Customize a plugin

Similarly to the back-end override system any file added in my-app/extensions/<plugin-name>/admin/ will be copied and used instead of the original one (use with care).

Example: Changing the current WYSIWYG

Path --my-app/extensions/content-manager/admin/src/components/WysiwygWithErrors/index.js

# Styles

The AdminUI package source can be easily found in ./node_modules/strapi-admin/src/.

For example, to change the top-left displayed admin panel's color, copy the ./node_modules/strapi-admin/admin/src/components/LeftMenuHeader folder to ./admin/src/components/LeftMenuHeader and change the styles inside ./admin/src/components/LeftMenuHeader/Wrapper.js.

Dynamically Generate Object Keys Js File

Thus, you are replacing the files that would normally be in node_modules/strapi-admin/admin/src and directing them to admin/src/some/file/path.

To apply your changes you need to rebuild your admin panel

# Logo

To change the top-left displayed admin panel's logo, add your custom image at ./admin/src/assets/images/logo-strapi.png.

TIP

make sure the size of your image is the same as the existing one (434px x 120px).

# Tutorial videos

To disable the information box containing the tutorial videos, create a file at ./admin/src/config.js

Add the following configuration:

Dynamically Generate Object Keys Js Pdf

# Changing the port

By default, the front-development server runs on the 8000 port. However, you can change this setting by updating the following configuration:

Path —./config/environment/**/server.json.

# Build

Js Object Add Key

To build the administration, run the following command from the root directory of your project.

Dynamically Generate Object Keys Js Download

you can build your admin panel with a specific configuration (located in the ./config/environments/**/server.json) config by specifying a NODE_ENV as follows:

This will replace the folder's content located at ./build. Visit http://localhost:1337/admin to make sure your updates have been taken into account.