tessl/npm-lodash-es
Lodash utility library exported as ES6 modules for modern JavaScript applications with tree-shaking support.
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seq.mddocs/
Sequence Functions
Chain operations that enable method chaining and lazy evaluation for complex data transformation pipelines.
Capabilities
Chain Operations
/**
* Creates a lodash wrapper instance that enables lazy evaluation and method chaining
* @param {*} value - The value to wrap
* @returns {Object} Returns the new lodash wrapper instance
*/
function chain(value);
/**
* Executes the chain sequence to resolve the unwrapped value
* @returns {*} Returns the resolved unwrapped value
*/
function value();
/**
* Creates a clone of the chained sequence planting value as the wrapped value
* @param {*} value - The value to plant
* @returns {Object} Returns the new lodash wrapper instance
*/
function plant(value);
/**
* Enables the wrapper to be iterable
* @returns {Object} Returns the wrapper
*/
function toIterator();Usage Examples
import { chain } from "lodash-es";
import _ from "lodash-es";
// Method chaining with explicit chain
const users = [
{ name: "Alice", age: 25, active: true },
{ name: "Bob", age: 30, active: false },
{ name: "Charlie", age: 35, active: true }
];
const result = chain(users)
.filter("active")
.map("name")
.sort()
.value();
// ["Alice", "Charlie"]
// Using lodash wrapper
const result2 = _(users)
.filter({ active: true })
.map("age")
.sum()
.value();
// 60
// Complex transformation chain
const data = [
{ category: "A", value: 10 },
{ category: "B", value: 20 },
{ category: "A", value: 30 },
{ category: "C", value: 15 }
];
const summary = chain(data)
.groupBy("category")
.mapValues(group => _.sumBy(group, "value"))
.toPairs()
.sortBy(1)
.reverse()
.value();
// [["A", 40], ["B", 20], ["C", 15]]