@ukon1990/js-utilities - npm Package Compare versions

Comparing version 1.4.0 to 1.5.0

dist/utils/text.util.d.ts

@@ -50,2 +50,11 @@ import { Match } from '../models/match.model';
     /**
+     * Converts an array of objects to a CSV string.
+     * @param list an array of objects
+     * @param delimiter the separation character to use. If none are provided, comma will be used.
+     * @param useKeys The keys from the object to use. If not provided, all the keys will be used.
+     *                  Providing a list of keys will improve performance.
+     */
+    static objectsToCSV(list: any[], delimiter?: string, useKeys?: string[]): string;
+    private static handleObjectToCSVRow;
+    /**
      *
@@ -52,0 +61,0 @@ * @param input The input string

dist/utils/text.util.js

@@ -135,2 +135,30 @@ import { Match } from '../models/match.model';
     /**
+     * Converts an array of objects to a CSV string.
+     * @param list an array of objects
+     * @param delimiter the separation character to use. If none are provided, comma will be used.
+     * @param useKeys The keys from the object to use. If not provided, all the keys will be used.
+     *                  Providing a list of keys will improve performance.
+     */
+    static objectsToCSV(list, delimiter = ',', useKeys) {
+        let body = '';
+        const keyMap = {};
+        if (useKeys) {
+            useKeys.forEach(key => keyMap[key] = true);
+        }
+        list.forEach((obj) => body = this.handleObjectToCSVRow(useKeys, obj, keyMap, delimiter, body));
+        useKeys = Object.keys(keyMap).map(key => this.camelCaseToSentence(key));
+        return `${useKeys.join(delimiter)}\n\r${body}`;
+    }
+    static handleObjectToCSVRow(useKeys, obj, keyMap, delimiter, body) {
+        if (!useKeys) {
+            Object.keys(obj).forEach(key => keyMap[key] = true);
+        }
+        let row = '';
+        row += Object.keys(keyMap)
+            .map((key) => obj[key])
+            .join(delimiter);
+        body += row + '\n\r';
+        return body;
+    }
+    /**
      *
@@ -137,0 +165,0 @@ * @param input The input string

dist/utils/text.util.js.map

@@ -1,1 +0,1 @@
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dist/utils/text.util.spec.js

@@ -93,2 +93,18 @@ import { TextUtil } from './text.util';
     });
+    describe('objectsToCSV', () => {
+        it('can convert a list of objects with identical keys', () => {
+            const list = [
+                { name: 'John', age: 90 },
+                { name: 'Aga', age: 12 }
+            ];
+            expect(TextUtil.objectsToCSV(list, ';'))
+                .toEqual('Name;Age\n\r' +
+                'John;90\n\r' +
+                'Aga;12\n\r');
+            expect(TextUtil.objectsToCSV(list, ';', ['name']))
+                .toEqual('Name\n\r' +
+                'John\n\r' +
+                'Aga\n\r');
+        });
+    });
     describe('csvToObjects', () => {
@@ -95,0 +111,0 @@ it('can generate object from csv', () => {

dist/utils/text.util.spec.js.map

@@ -1,1 +0,1 @@
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package.json

 {
   "name": "@ukon1990/js-utilities",
-  "version": "1.4.0",
+  "version": "1.5.0",
   "description": "A light weight package for object and array manipulation. As well as some utilities for matching text.",
@@ -22,3 +22,4 @@ "main": "dist/index.js",
     "Equality",
-    "isEmpty"
+    "isEmpty",
+    "CSV"
   ],
@@ -25,0 +26,0 @@ "author": "Jonas Munthe Flønes",

README.md

@@ -39,2 +39,4 @@ # Javascript utilities
     Generates an array of objects from a CSV string.
+* `objectsToCSV(list, delimiter?: string = ',', useKeys?: string[])` - Converts a list of objects to a CSV string. If provided with the 
+keys that is supposed to be used from the objects, it will increase performance.
 
@@ -41,0 +43,0 @@ ## EmptyUtil

src/utils/text.util.spec.ts

@@ -119,2 +119,19 @@ import {TextUtil} from './text.util';
 
+    describe('objectsToCSV', () => {
+        it('can convert a list of objects with identical keys', () => {
+            const list = [
+                {name: 'John', age: 90},
+                {name: 'Aga', age: 12}
+            ];
+            expect(TextUtil.objectsToCSV(list, ';'))
+                .toEqual('Name;Age\n\r' +
+                    'John;90\n\r' +
+                    'Aga;12\n\r');
+            expect(TextUtil.objectsToCSV(list, ';', ['name']))
+                .toEqual('Name\n\r' +
+                    'John\n\r' +
+                    'Aga\n\r');
+        });
+    });
+
     describe('csvToObjects', () => {
@@ -121,0 +138,0 @@ it('can generate object from csv', () => {

src/utils/text.util.ts

@@ -160,2 +160,45 @@ import {Match} from '../models/match.model';
     /**
+     * Converts an array of objects to a CSV string.
+     * @param list an array of objects
+     * @param delimiter the separation character to use. If none are provided, comma will be used.
+     * @param useKeys The keys from the object to use. If not provided, all the keys will be used.
+     *                  Providing a list of keys will improve performance.
+     */
+    public static objectsToCSV(list: any[], delimiter: string = ',', useKeys?: string[]): string {
+        let body = '';
+        const keyMap = {};
+
+        if (useKeys) {
+            useKeys.forEach(key =>
+                keyMap[key] = true);
+        }
+
+        list.forEach((obj) =>
+            body = this.handleObjectToCSVRow(useKeys, obj, keyMap, delimiter, body));
+
+        useKeys = Object.keys(keyMap).map(key =>
+            this.camelCaseToSentence(key));
+
+        return `${
+            useKeys.join(delimiter)
+            }\n\r${
+            body}`;
+    }
+
+    private static handleObjectToCSVRow(useKeys: string[], obj, keyMap, delimiter: string, body: string) {
+        if (!useKeys) {
+            Object.keys(obj).forEach(key =>
+                keyMap[key] = true);
+        }
+        let row = '';
+        row += Object.keys(keyMap)
+            .map((key: string) =>
+                obj[key])
+            .join(delimiter);
+
+        body += row + '\n\r';
+        return body;
+    }
+
+    /**
      *
@@ -162,0 +205,0 @@ * @param input The input string

No alert changes

Improved metrics

Total package byte prevSize

203386

3.04%

Lines of code

3048

3.57%

Number of lines in readme file

54

3.85%

No dependency changes