The Helpers 2012

[Rita Seliba]

Workingon a prototype using phoenix 1.7-rc and ash_authentication_phoenix, and getting the following error:

function MyAppWeb.Router.Helpers.auth_path/2 is undefined (module MyAppWeb.Router.Helpers is not available)

We have a new feature. This feature replaces the Helpers module generated in your Phoenix router, but helpers will continue to work and be generated (when you create an Phoenix 1.7 app). You can disable router helpers by passing the helpers: false option to use Phoenix.Router.

This feature replaces the Helpers module generated in your Phoenix router. For new applications helpers are not generated by default. You can enable router helpers by passing the helpers: true option to use Phoenix.Router.

I still see the helpers in my Layer Explorer as well as in my Scene Explorer but unhiding does not work (not by choosing any 'unhide all' command, not by clicking the visibility icon where I can find it).

As I said and as you can see in my screenshot: there are helpers visible. I double-checked display tab, used Shift+H multiple times, used 'unhide all' from toolbox, scene explorer, schematic view... these helpers stay hidden.

Points have their own display options in Display tab (other than helpers. As points are sub classes of helpers they are effected by helpers toggle. But they can be turned off specifically even tough helpers are visible). You might accidentally turned them off by highlighting them.)

Laravel includes a variety of global "helper" PHP functions. Many of these functions are used by the framework itself; however, you are free to use them in your own applications if you find them convenient.

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The Arr::mapSpread method iterates over the array, passing each nested item value into the given closure. The closure is free to modify the item and return it, thus forming a new array of modified items:

The Arr::toCssClasses method conditionally compiles a CSS class string. The method accepts an array of classes where the array key contains the class or classes you wish to add, while the value is a boolean expression. If the array element has a numeric key, it will always be included in the rendered class list:

The Arr::toCssStyles conditionally compiles a CSS style string. The method accepts an array of classes where the array key contains the class or classes you wish to add, while the value is a boolean expression. If the array element has a numeric key, it will always be included in the rendered class list:

The Number::clamp method ensures a given number stays within a specified range. If the number is lower than the minimum, the minimum value is returned. If the number is higher than the maximum, the maximum value is returned:

The Number::pairs method generates an array of number pairs (sub-ranges) based on a specified range and step value. This method can be useful for dividing a larger range of numbers into smaller, manageable sub-ranges for things like pagination or batching tasks. The pairs method returns an array of arrays, where each inner array represents a pair (sub-range) of numbers:

The app_path function returns the fully qualified path to your application's app directory. You may also use the app_path function to generate a fully qualified path to a file relative to the application directory:

The base_path function returns the fully qualified path to your application's root directory. You may also use the base_path function to generate a fully qualified path to a given file relative to the project root directory:

The config_path function returns the fully qualified path to your application's config directory. You may also use the config_path function to generate a fully qualified path to a given file within the application's configuration directory:

The database_path function returns the fully qualified path to your application's database directory. You may also use the database_path function to generate a fully qualified path to a given file within the database directory:

The lang_path function returns the fully qualified path to your application's lang directory. You may also use the lang_path function to generate a fully qualified path to a given file within the directory:

The public_path function returns the fully qualified path to your application's public directory. You may also use the public_path function to generate a fully qualified path to a given file within the public directory:

The resource_path function returns the fully qualified path to your application's resources directory. You may also use the resource_path function to generate a fully qualified path to a given file within the resources directory:

The storage_path function returns the fully qualified path to your application's storage directory. You may also use the storage_path function to generate a fully qualified path to a given file within the storage directory:

The config function gets the value of a configuration variable. The configuration values may be accessed using "dot" syntax, which includes the name of the file and the option you wish to access. A default value may be specified and is returned if the configuration option does not exist:

You may set configuration variables at runtime by passing an array of key / value pairs. However, note that this function only affects the configuration value for the current request and does not update your actual configuration values:

By default, the fake function will utilize the app.faker_locale configuration option in your config/app.php configuration. Typically, this configuration option is set via the APP_FAKER_LOCALE environment variable. You may also specify the locale by passing it to the fake function. Each locale will resolve an individual singleton:

Since the "default value" provided as the second argument to the old function is often an attribute of an Eloquent model, Laravel allows you to simply pass the entire Eloquent model as the second argument to the old function. When doing so, Laravel will assume the first argument provided to the old function is the name of the Eloquent attribute that should be considered the "default value":

The once function executes the given callback and caches the result in memory for the duration of the request. Any subsequent calls to the once function with the same callback will return the previously cached result:

The optional function accepts any argument and allows you to access properties or call methods on that object. If the given object is null, properties and methods will return null instead of causing an error:

The rescue function executes the given closure and catches any exceptions that occur during its execution. All exceptions that are caught will be sent to your exception handler; however, the request will continue processing:

The retry function attempts to execute the given callback until the given maximum attempt threshold is met. If the callback does not throw an exception, its return value will be returned. If the callback throws an exception, it will automatically be retried. If the maximum attempt count is exceeded, the exception will be thrown:

The tap function accepts two arguments: an arbitrary $value and a closure. The $value will be passed to the closure and then be returned by the tap function. The return value of the closure is irrelevant:

If no closure is passed to the tap function, you may call any method on the given $value. The return value of the method you call will always be $value, regardless of what the method actually returns in its definition. For example, the Eloquent update method typically returns an integer. However, we can force the method to return the model itself by chaining the update method call through the tap function:

To add a tap method to a class, you may add the Illuminate\Support\Traits\Tappable trait to the class. The tap method of this trait accepts a Closure as its only argument. The object instance itself will be passed to the Closure and then be returned by the tap method:

Sometimes you may wish to quickly test the performance of certain parts of your application. On those occasions, you may utilize the Benchmark support class to measure the number of milliseconds it takes for the given callbacks to complete:

To invoke a callback more than once, you may specify the number of iterations that the callback should be invoked as the second argument to the method. When executing a callback more than once, the Benchmark class will return the average amount of milliseconds it took to execute the callback across all iterations:

Sometimes, you may want to benchmark the execution of a callback while still obtaining the value returned by the callback. The value method will return a tuple containing the value returned by the callback and the amount of milliseconds it took to execute the callback:

Laravel includes Carbon, a powerful date and time manipulation library. To create a new Carbon instance, you may invoke the now function. This function is globally available within your Laravel application:

You may combine Laravel's lottery class with other Laravel features. For example, you may wish to only report a small percentage of slow queries to your exception handler. And, since the lottery class is callable, we may pass an instance of the class into any method that accepts callables:

Laravel's Pipeline facade provides a convenient way to "pipe" a given input through a series of invokable classes, closures, or callables, giving each class the opportunity to inspect or modify the input and invoke the next callable in the pipeline:

As you can see, each invokable class or closure in the pipeline is provided the input and a $next closure. Invoking the $next closure will invoke the next callable in the pipeline. As you may have noticed, this is very similar to middleware.

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