function updated quantity via node js stack overflow code example
Example 1: data at transit encrypting nodejs stack overflow
var crypto = require('crypto');
var assert = require('assert');
var algorithm = 'aes256';
var key = 'password';
var text = 'I love kittens';
var cipher = crypto.createCipher(algorithm, key);
var encrypted = cipher.update(text, 'utf8', 'hex') + cipher.final('hex');
var decipher = crypto.createDecipher(algorithm, key);
var decrypted = decipher.update(encrypted, 'hex', 'utf8') + decipher.final('utf8');
assert.equal(decrypted, text);
Example 2: javascript currying stack overflow
let doTheHardStuff = function(x) {
let z = doSomethingComputationallyExpensive(x)
return function (y){
z + y
}
}
We could call this function once,
then pass around the result to be used in lots of places,
meaning we only do the computationally expensive stuff once:
let finishTheJob = doTheHardStuff(10)
finishTheJob(20)
finishTheJob(30)