Elysia Tools
Navigation
Data Processing
Fill array with value from start to end index using lodash _.fill
Details
Fill Array Tool
This tool uses lodash _.fill() method to populate array elements with a specified value.
Features:
Examples:
[1, 2, 3, 4, 5]*1, End: 4[1, '*', '*', '*', 5][null, null, null]"filled"0, End: (leave empty)["filled", "filled", "filled"][1, 2, 3]true (with parseValueAsJSON checked)[true, true, true] (boolean, not string)Execution
Fill in the form, run the tool, and review the result in one place.
Samples
Related
Tool usage guide
The Fill Array tool uses lodash's _.fill() method to populate array elements with a specified value. It allows you to control the start and end indices for partial filling and supports JSON parsing to ensure values are handled with the correct data types.
Background
A developer has an array [1, 2, 3, 4, 5] and needs to replace elements from index 1 to 3 with '*'.
Problem
Manually editing the array is time-consuming and error-prone.
How to use
Input the array, set value to '*', start index to 1, end index to 4.
Outcome
The array becomes [1, '*', '*', '*', 5].
Background
A user has an array of nulls [null, null, null] and wants to fill it with 'filled'.
Problem
Need to populate all elements with a consistent value.
How to use
Input the array, set value to 'filled', leave start and end indices as default or empty.
Outcome
The array is transformed to ['filled', 'filled', 'filled'].
Background
An array [1, 2, 3] needs to be filled with boolean true values.
You can use any value, including strings, numbers, booleans, or objects.
Yes, by specifying the start and end indices, you can fill a specific range.
Yes, it supports filling with nested structures, and JSON parsing ensures correct handling.
If left empty, the fill operation extends to the end of the array.
The tool can handle arrays of various sizes, but performance may depend on your browser's capabilities.
Problem
Without JSON parsing, 'true' would be a string, not a boolean.
How to use
Input the array, set value to 'true', enable 'Parse Value as JSON'.
parseValueAsJSON: trueOutcome
The array becomes [true, true, true] with boolean values.