time-to-botec

README.md (5310B)

---

 <!--
 
 @license Apache-2.0
 
 Copyright (c) 2018 The Stdlib Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
 
    http://www.apache.org/licenses/LICENSE-2.0
 
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 
 -->
 
 # deepHasOwnProp
 
 > Test whether an object contains a nested key path.
 
 <section class="usage">
 
 ## Usage
 
 ```javascript
 var deepHasOwnProp = require( '@stdlib/assert/deep-has-own-property' );
 ```
 
 #### deepHasOwnProp( value, path\[, options] )
 
 Returns a `boolean` indicating if a `value` has a specified `path`.
 
 <!-- eslint-disable object-curly-newline, object-curly-spacing -->
 
 ```javascript
 var obj = { 'a': { 'b': { 'c': 'd' } } };
 
 var bool = deepHasOwnProp( obj, 'a.b.c' );
 // returns true
 
 bool = deepHasOwnProp( obj, 'a.b.c.d.e' );
 // returns false
 ```
 
 If a key path includes an `array`, specify the numeric index.
 
 <!-- eslint-disable object-curly-newline, object-curly-spacing -->
 
 ```javascript
 var arr = [
     {
         'a': [
             {
                 'b': [
                     { 'c': 'd' },
                     { 'e': 'f' }
                 ]
             }
         ]
     }
 ];
 
 var bool = deepHasOwnProp( arr, '0.a.0.b.0.c' );
 // returns true
 
 bool = deepHasOwnProp( arr, '0.a.1.b.0.c' );
 // returns false
 
 bool = deepHasOwnProp( arr, '0.a.0.b.1.c' );
 // returns false
 ```
 
 The key path may be specified as either a delimited `string` or a key `array`.
 
 <!-- eslint-disable object-curly-newline, object-curly-spacing -->
 
 ```javascript
 var obj = { 'a': { 'b': { 'c': 'd' } } };
 
 var bool = deepHasOwnProp( obj, [ 'a', 'b', 'c' ] );
 // returns true
 ```
 
 The function accepts the following `options`:
 
 -   **sep**: key path separator. Default: `'.'`.
 
 By default, the function assumes `.` separated key values. To specify an alternative separator, set the `sep` option.
 
 <!-- eslint-disable object-curly-newline, object-curly-spacing -->
 
 ```javascript
 var obj = { 'a': { 'b': { 'c': 'd' } } };
 
 var bool = deepHasOwnProp( obj, 'a/b/c', {
     'sep': '/'
 });
 // returns true
 ```
 
 #### deepHasOwnProp.factory( path\[, options] )
 
 Returns a `function` which tests whether a `value` contains a nested key `path`.
 
 ```javascript
 var has = deepHasOwnProp.factory( 'a/b/c', {
     'sep': '/'
 });
 ```
 
 #### has( value )
 
 Returns a `boolean` indicating whether a `value` contains a nested key `path`.
 
 <!-- eslint-disable object-curly-newline, object-curly-spacing -->
 
 ```javascript
 var has = deepHasOwnProp.factory( 'a.b.c' );
 
 var obj = { 'a': { 'b': { 'c': 'd' } } };
 
 var bool = has( obj );
 // returns true
 ```
 
 </section>
 
 <!-- /.usage -->
 
 <section class="notes">
 
 ## Notes
 
 -   Only **own** properties are tested. Paths matching inherited properties are not considered.
 
     ```javascript
     function Foo() {
         this.a = 'b';
         return this;
     }
     Foo.prototype.c = 'd';
 
     var foo = new Foo();
 
     var bool = deepHasOwnProp( foo, 'a' );
     // returns true
 
     bool = deepHasOwnProp( foo, 'c' );
     // returns false
     ```
 
 -   When provided `null` or `undefined`, the function result is always `false`.
 
     ```javascript
     var bool = deepHasOwnProp( null, 'a.b.c' );
     // returns false
 
     bool = deepHasOwnProp( void 0, 'a.b.c' );
     // returns false
     ```
 
 -   Property values other than `null` or `undefined` are coerced to `objects`.
 
     ```javascript
     var obj = {
         'a': 'b'
     };
 
     var bool = deepHasOwnProp( obj, 'a.length' );
     // returns true
     ```
 
 -   Key path `array` elements are coerced to `strings`.
 
     ```javascript
     var obj = {
         'null': false
     };
     var bool = deepHasOwnProp( obj, [ null ] );
     // returns true
 
     obj = {
         '[object Object]': false
     };
     bool = deepHasOwnProp( obj, [ {} ] );
     // returns true
     ```
 
 </section>
 
 <!-- /.notes -->
 
 <section class="examples">
 
 ## Examples
 
 <!-- eslint-disable object-curly-newline, object-curly-spacing -->
 
 <!-- eslint no-undef: "error" -->
 
 ```javascript
 var deepHasOwnProp = require( '@stdlib/assert/deep-has-own-property' );
 
 var bool;
 var has;
 
 bool = deepHasOwnProp( { 'a': { 'b': { 'c': 'd' } } }, 'a.b.c' );
 // returns true
 
 bool = deepHasOwnProp( { 'a': { 'b': { 'c': 'd' } } }, [ 'a', 'b', 'c' ] );
 // returns true
 
 bool = deepHasOwnProp( { 'a': { 'b': { 'c': 'd' } } }, 'a/b/c', {
     'sep': '/'
 });
 // returns true
 
 bool = deepHasOwnProp( { 'a': { 'b': { 'c': 'd' } } }, 'a.b.c.d' );
 // returns false
 
 bool = deepHasOwnProp( { 'a': [ { 'b': { 'c': 'd' } } ] }, [ 'a', '0', 'b', 'c', 'd' ] );
 // returns false
 
 bool = deepHasOwnProp( { 'a': { 'b': { 'c': 'd' } } }, 'a/b/c/d/e', {
     'sep': '/'
 });
 // returns false
 
 // Create a customized function:
 has = deepHasOwnProp.factory( 'a_b_c', {
     'sep': '_'
 });
 
 bool = has( { 'a': { 'b': { 'c': 'd' } } } );
 // returns true
 
 bool = has( { 'a': [ { 'b': { 'c': 'd' } } ] } );
 // returns false
 ```
 
 </section>
 
 <!-- /.examples -->
 
 <section class="links">
 
 </section>
 
 <!-- /.links -->