Django Public Recipes

django



In this code, the fieldName variable is set to ImageField. This means that the field will be an image field, and it will be able to store image files that are up to 100KB in size. The height_field, width_field, and max_length variables are not set, so they will be automatically set to the appropriate values based on the type of field that is being created.

Image Field



This code creates a file field that allows users to input a maximum file size of 100 MB.

File Field



This code creates a model field called EmailField with a maximum length of 254 characters.

Email Field



The fieldName is a name for the field in your model. The max_digits and decimal_places arguments set the maximum and number of digits in the field, respectively.

Django Decimal Field



This code creates a new DateTimeField object. The auto_now and auto_now_add options determine how the DateTimeField object behaves. The auto_now_add option allows the field to automatically update its value when a new date and time is entered into the field. The auto_now option causes the field to always use the current date and time as its value.

DateTime Field



The code uses the models.DateField class to create a field that stores dates in the current time format (yyyy-mm-dd) or with the addition of a time stamp (yyyy-mm-dd HH:mm).

Date Field



This code creates a new field named "fieldName" in the model instance. The field will be a boolean field.

Boolean field



The code above declares a field named "fieldName" of type "IntegerField".

Django Int Field



In this code, "fieldName" is a name for a new CharField. The CharField has a maximum length of 150 characters.

Django Model Char Field

 = models.ModelField()
   

In this code, ClassName is a class that inherits from models.Model. Fields is a property that is defined in ClassName. Fields is a list of model fields that are inherited by ClassName.

Django Generic Model Class

# All recipes published for Python
oiwejf
weoiwejf
owiejf
woeifj
woeifj
woeifj


Python public recipes

 

The code prints out the keys and values of the dictionary.

Iterate over dictionary values

 # TypeError: add() takes exactly 2 and 3 as arguments

The code above defines a function called add. This function takes two arguments, x and y. When the code tries to call the function with an argument other than 2 or 3, it will generate an error.

Lambda function for adding numbers



A @dataclass annotation tells the compiler to create a class that acts as a data type. In this case, the @dataclass annotation tells the compiler to create a class that represents an integer value.

The val field in this class is an int value that represents the integer value of the class.

Dataclass

Set of useful recipes for React projects in TypeScript.

React TypeScript Recipes

react



In this code, the filename class is exported and then used as a component. The filename class defines one method, render, which returns a div.

React class component

My JavaScript recipes



The code block checks to see if the array is an array and if it is, it checks to see if the length of the array is zero.

Check if array is empty

Get current directory



The os.path.relpath() function returns the relative path to a file or directory. In this case, it returns the path to the /etc/passwd file.

Get relative path



This returns the absolute path of the current file.

Get absolute path



This code checks to see if the file '/path/to/check' exists.

Check path is a file



The os.path.isdir function tests to see if the given path is a directory. If the path is a directory, then the return value is true.

Check if a file is a directory



This code prints the size of the file "/path/to/file" on the console.

Get size of a file



This code copies the content of the source_file to the destination_file.

Copy files



The code will copy all of the files and folders in 'source_directory' to 'destination_directory'.

Copy directory recursively



This command moves the file source_file.txt from its original location to the destination_file.txt.

Copy File



The code creates a ZipFile object and extracts all files from the myfile.zip file.

Extract zipfile



The code first creates a new ZipFile object and stores the path to the myfile.zip file in the zipfile variable. Then, the code writes the contents of the file.txt file to the new_zip object using the zipfile.ZIP_DEFLATED compression type.

Create new ZIP file

The code opens the file "filename.json" in "w" mode, writes the JSON content to the file, and indents the code two spaces.

Write JSON to in a file



The loop will keep running until it finds a value for 'i' that is less than zero.

While loop

Simple for loop that prints elements of the list

For loop



This code iterates over the mylist object and passes each item as a parameter to the pass function.



console.timeEnd() returns the time in milliseconds since the system was started.

Console timer



The code creates a new Promise object and sets its then method to resolve, which will return the result of the code block, and its catch method to reject, which will throw an error if the code block fails.

Promise Complete with then and catch



The code returns a new Promise object. The Promise object has two methods: resolve, which returns a boolean indicating whether the promise was successfully resolved, and reject, which returns a boolean indicating whether the promise was rejected.

Create promise

TypeScript recipes



The iterator variable refers to an object's enumerator, which maintains a pointer to the next element in the object. The code constructs a key for the object using the iterator's reference as the key, and then iterates over the object using the key.

Forof



The code is iterating through the myobject object, looking for a key called key. If it finds the key, it checks to see if it exists on Object.hasOwnProperty. If it does, it then retrieves the object at that key from myobject, and assigns it to element.

For in



This code iterates through the array, assigning each element to the variable "array." It then replaces the "array" variable with the new "element" variable.

For loop - iterate over array



The code looks for a function named "forEach" and calls it with the currentItem as its parameter. The forEach() function takes two parameters: an Array object and a callback function. The callback function will be called for every item in the Array object.

Foreach - iterate over array



The forEach method iterates through the given array, executing the given function for each item in the array.

foreach - iterate on object



The code is iterating through the array looking for the first occurrence of the element "element" and setting the value of "array" to that element.



The code block will iterate through the object and check to see if the key exists in the Object object. If it does, then it will get the value stored at the key in the object and assign it to the element variable.

Forin



The code is iterating through the objects in the array. The iterator variable is pointing to the first object in the array, so the code is executing for each object in the array. Inside the for loop, there is a variable called key that is set to the value of the first object in the array.

For of



This code sets a timer that calls a function after a certain amount of time has passed. The function is called after the delayInms milliseconds have passed.

setTimeout



This code will execute the "intervalInms" function every "intervalInms" milliseconds.

Set Interval

All recipes for the Angular framework using TypeScript

Angular TypeScript Recipes

angular



This code will track the model by its id.

Angular Trackby



This code subscribes to the "property" event on the "service" object and sets the "this.property" property to the received argument.

Angular Subscribe



When an injectable is provided, the @Injectable annotation will automatically provide the httpClient object. This object will be used to make HTTP requests.

Angular Service HttpClient



This code allows a ServiceNameService to be injected into a root injectable object.

Angular Service



This code creates a new empty array called Routes.

Angular Routes



The code defines a function called checkEvents. Within this function, the code subscribes to the events property on the router object. This property contains events that are raised by the browser.

When an event is raised, the code checks to see if the event instance is the eventName object. If it is, the code breaks out of the function. If it is not, the code simply breaks out of the function.

Angular Router Events



The code defines a path to a component, and a list of child components that will be loaded along with it. The path is relative to the component's parent (in this case, the document).

Name	Language	Author	Uses
Image Field	Python	JD Julien Delange	2
File Field	Python	JD Julien Delange	0
Email Field	Python	JD Julien Delange	0
Django Decimal Field	Python	JD Julien Delange	0
DateTime Field	Python	JD Julien Delange	1
Date Field	Python	JD Julien Delange	2
Boolean field	Python	JD Julien Delange	3
Django Int Field	Python	JD Julien Delange	0
Django Model Char Field	Python	JD Julien Delange	7
Django Generic Model Class	Python	JD Julien Delange	28
Iterate over dictionary values	Python	JD Julien Delange	22
Lambda function for adding numbers	Python	JD Julien Delange	15
Dataclass	Python	JD Julien Delange	33
React class component	TypeScript	JR Jose Romero	23
Check if array is empty	JavaScript	JD Julien Delange	11
Get current directory	Python	JD Julien Delange	3
Get relative path	Python	JD Julien Delange	12
Get absolute path	Python	JD Julien Delange	5
Check path is a file	Python	JD Julien Delange	8
Check if a file is a directory	Python	JD Julien Delange	5
Get size of a file	Python	JD Julien Delange	4
Copy files	Python	JD Julien Delange	17
Copy directory recursively	Python	JD Julien Delange	6
Copy File	Python	JD Julien Delange	9
Extract zipfile	Python	JD Julien Delange	1
Create new ZIP file	Python	JD Julien Delange	6
Write JSON to in a file	Python	JD Julien Delange	26
While loop	Python	JD Julien Delange	10
For loop	Python	JD Julien Delange	18
For loop	Python	JD Julien Delange	77
Console timer	JavaScript	JD Julien Delange	9
Promise Complete with then and catch	JavaScript	JD Julien Delange	8
Create promise	JavaScript	JD Julien Delange	5
Forof	TypeScript	JR Jose Romero	13
For in	TypeScript	JR Jose Romero	21
For loop - iterate over array	TypeScript	JR Jose Romero	17
Foreach - iterate over array	TypeScript	JR Jose Romero	35
foreach - iterate on object	JavaScript	JD Julien Delange	23
For loop	JavaScript	JD Julien Delange	17
Forin	JavaScript	JD Julien Delange	4
For of	JavaScript	JD Julien Delange	5
setTimeout	TypeScript	JR Jose Romero	17
Set Interval	TypeScript	JR Jose Romero	27
Angular Trackby	TypeScript	JR Jose Romero	0
Angular Subscribe	TypeScript	JR Jose Romero	0
Angular Service HttpClient	TypeScript	JR Jose Romero	0
Angular Service	TypeScript	JR Jose Romero	0
Angular Routes	TypeScript	JR Jose Romero	0
Angular Router Events	TypeScript	JR Jose Romero	0
Angular Route Path With Children	TypeScript	JR Jose Romero	0

Codiga Snippets, page 69