https://github.com/afaur/objhas

Find out if a js object (used as a dictionary/hash) has a property nested within.
https://github.com/afaur/objhas

Last synced: 10 months ago
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Find out if a js object (used as a dictionary/hash) has a property nested within.

• Host: GitHub
• URL: https://github.com/afaur/objhas
• Owner: afaur
• License: unlicense
• Created: 2017-12-01T23:23:37.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2017-12-04T18:25:26.000Z (over 8 years ago)
• Last Synced: 2025-06-12T22:40:09.508Z (about 1 year ago)
• Language: JavaScript
• Homepage: https://afaur.github.io/objHas/
• Size: 268 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Why?

Need to determine if a nested property exists with a value (see caveats listed below).

# Other solutions exist

Why make this when many other solutions are out there? 

- Solutions have been proposed along with benchmarks of performace for each...

  - [Stack Overflow](https://stackoverflow.com/questions/2631001/javascript-test-for-existence-of-nested-object-key)

# What makes this different?

I do not believe this is by any means the best solution but...

- All code is [documented](https://afaur.github.io/objHas/)

- Has tests to ensure it handles your expected behavior (Look at `./bin/test`)

  - If a property exists but has a value of...

    - undefined - method will return `false`.

    - empty array - method will return `true`.

    - number 0 - method will return `false`.

    - ...and many more so please look at the tests (`./bin/test`)

- Uses a for loop instead of recursion.

  - [Stack Exchange](https://softwareengineering.stackexchange.com/questions/179863/performance-recursion-vs-iteration-in-javascript)

- Is meant to be copy and pasted into your project and not installed through npm

# Versions

Identical except that `compatibility` will work without new language features.

- Latest (`./lib/objHas.js`)

  - Uses `const` and `let`

  - Uses `rest` parameters

  - Uses `arrow` functions

- Compatiblity (`./lib/.objHas.js`)

  - Uses `var`

  - Uses `Array.prototype.slice` on arguments

  - Uses `function`

# Run Tests (latest version)

```$ make```

# Run Tests (compatiblity version)

```$ make test```