@supercharge/collections - npm Package Compare versions

Comparing version 1.12.2 to 1.13.0

CHANGELOG.md

 # Changelog
 
+## [1.13.0](https://github.com/supercharge/collections/compare/v1.12.2...v1.13.0) - 2020-03-26
+
+### Updated
+- `unique` supports a string or callback function as a parameter to identify unique values
+
+
 ## [1.12.2](https://github.com/supercharge/collections/compare/v1.12.1...v1.12.2) - 2020-03-12
@@ -4,0 +10,0 @@

package.json

 {
   "name": "@supercharge/collections",
   "description": "Supercharge collections",
-  "version": "1.12.2",
+  "version": "1.13.0",
   "author": "Marcus Pöhls <[e-mail]>",
@@ -6,0 +6,0 @@ "bugs": {

src/collection-proxy.js

@@ -693,6 +693,8 @@ 'use strict'
    *
+   * @param {String|Function}
+   *
    * @returns {CollectionProxy}
    */
-  unique () {
-    return this._enqueue('unique')
+  unique (key) {
+    return this._enqueue('unique', null, key)
   }
@@ -699,0 +701,0 @@

src/collection.js

@@ -717,11 +717,45 @@ 'use strict'
    *
+   * @param {String|Function}
+   *
    * @returns {Array}
    */
-  unique () {
-    return Array.from(
-      new Set(this.items)
-    )
+  async unique (key) {
+    if (!key) {
+      return Array.from(
+        new Set(this.items)
+      )
+    }
+
+    const exists = new Set()
+    const callback = this.valueRetriever(key)
+
+    return this.reject(async item => {
+      const id = await callback(item)
+
+      if (exists.has(id)) {
+        return true
+      }
+
+      exists.add(id)
+    })
   }
 
   /**
+   * Create a value receiving callback.
+   *
+   * @param {*} value
+   *
+   * @returns {Function}
+   */
+  valueRetriever (value) {
+    if (typeof value === 'function') {
+      return value
+    }
+
+    return function (item) {
+      return item[value]
+    }
+  }
+
+  /**
    * Add one or more items to the beginning of the collection.
@@ -728,0 +762,0 @@ *

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Improved metrics

Total package byte prevSize

45827

increased by1.92%

Lines of code

1363

increased by2.25%

No dependency changes