30秒学会 Dart 片段 – averageBy
Returns the average of a list, after mapping each element to a number using the provided function. U...
Returns the average of a list, after mapping each element to a number using the provided function. U...
Renders a carousel component. Use the React.useState() hook to create the active state variable and ...
Renders a star rating component. Define a component, called Star that will render each individual st...
Returns a random integer in the specified range. Use Random.Next() to generate an integer in the des...
Returns true if the target value exists in a JSON object, false otherwise. Check if keys is non-empt...
Check if a date is before another date. Use the less than operator (<) to check if the first date...
Returns true if the given string is a palindrome, false otherwise. Use String.toLowerCase() to conve...
title: is_contained_in tags: list,intermediate Returns True if the elements of the first list are co...
Calculates the factorial of a number. Use recursion. If num is less than or equal to 1, return 1. Ot...
Splits values into two groups according to a predicate function, which specifies which group an elem...