List out frequently used dataweave inbuilt functions?
DataWeave offers a rich set of built-in functions for various data manipulation tasks. Here are some frequently used functions categorized by their purpose:
General manipulation:
Concatenation:
dw::core::++: Combines two strings or arrays.
Conditional logic:
isEmpty: Checks if a value is empty (null, "", or []).
contains: Determines if a string contains a specific substring.
Iteration and transformation:
map: Applies an expression to each element in an array and returns a new array.
filter: Creates a new array containing elements that match a specific condition.
Aggregations:
min: Returns the element with the lowest value in an array.
max: Returns the element with the highest value in an an array.
avg: Calculates the average of numeric values in an array.
Type conversion:
dw::util::Coercions.toArray: Converts a value to an array.
String manipulation:
Case conversion:
camelize: Converts a string to camelCase.
capitalize: Capitalizes the first letter of a string.
Searching and extraction:
startsWith: Checks if a string starts with a specific substring.
endsWith: Checks if a string ends with a specific substring.
substring: Extracts a portion of a string.
Formatting:
trim: Removes leading and trailing whitespace from a string.
replace: Replaces occurrences of a substring with another string.
Date and Time:
Date manipulation:
dw::core::Dates.format: Formats a date according to a specific pattern.
dw::core::Dates.daysBetween: Calculates the number of days between two dates.
Time conversion:
dw::core::Dates.parse: Parses a string into a date object.
Arrays:
Filtering and transformation:
filter: Creates a new array containing elements that match a condition.
flatMap: Applies an expression to each element in an array and flattens the results.
Aggregations:
countBy: Counts the occurrences of each unique value in an array.
sumBy: Calculates the sum of a specific property across all elements in an array.
This is not an exhaustive list, but it highlights some of the most commonly used DataWeave functions. You can find a comprehensive reference of all functions in the MuleSoft documentation https://docs.mulesoft.com/dataweave/latest/dw-functions.
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