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I have an array like
vendors = [{ Name: 'Magenic', ID: 'ABC' }, { Name: 'Microsoft', ID: 'DEF' } // and so on... ]; How do I check this array to see if "Magenic" exists? I don't want to loop, unless I have to. I'm working with potentially a couple thousand records.
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Using includes() Method: If array contains an object/element can be determined by using includes() method. This method returns true if the array contains the object/element else return false. Example: html.
Checking if Array of Objects Includes Object We can use the some() method to search by object's contents. The some() method takes one argument accepts a callback, which is executed once for each value in the array until it finds an element which meets the condition set by the callback function, and returns true .
isArray() method is used to check if an object is an array. The Array. isArray() method returns true if an object is an array, otherwise returns false . Note: For an array, the typeof operator returns an object.
No need to reinvent the wheel loop, at least not explicitly (using arrow functions, modern browsers only):
if (vendors.filter(e => e.Name === 'Magenic').length > 0) { /* vendors contains the element we're looking for */ } or, better yet, as it allows the browser to stop as soon as one element is found that matches, so it's going to be faster:
if (vendors.some(e => e.Name === 'Magenic')) { /* vendors contains the element we're looking for */ } EDIT: If you need compatibility with lousy browsers then your best bet is:
if (vendors.filter(function(e) { return e.Name === 'Magenic'; }).length > 0) { /* vendors contains the element we're looking for */ } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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