JavaScript Hex String to INT32 - Little Endian (DCBA Format) Javascript

You could adapt the excellent answer of T.J. Crowder and use DataView#setUint8 for the given bytes with DataView#getInt32 and an indicator for littleEndian.

var data = '7F02AAF7'.match(/../g);

// Create a buffer
var buf = new ArrayBuffer(4);
// Create a data view of it
var view = new DataView(buf);

// set bytes
data.forEach(function (b, i) {
    view.setUint8(i, parseInt(b, 16));
});

// get an int32 with little endian
var num = view.getInt32(0, 1);
console.log(num);
Answer:1

Node can do that pretty easily using buffers:

Buffer.from('7F02AAF7', 'hex').readInt32LE()
Answer:2

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