srcubber

Find and replace values in objects. Easily walk unkown structures and operate on its values. In-place updates by just returning whatever you want the new value to be.

install

npm install scrubber

usage

Find and replace string ObjectIDs

var query = {
$or: [
{
_id: '4fc487cc0afe090000000048'
},
{
name: 'foo',
_id: {$in: [1, 2, 3, '4fc487cc0afe090000000048']}
},
{
number: {$gt: 7}
}
]
}

scrub(query, function (obj, key, parent, type) {
// find any value that might be an ObjectID
if(type == 'string' && obj.length === 24) {
try {
// try and create one
var id = ObjectID.createFromHexString(obj)
} catch() { }

// replace the value with id
return id
}
})

Sum all the numbers in an object.

sum = {
a: [1]
b: {
c: [2],
d: {
e: [3],
f: {
g: [4]
}
}
}
}

total = 0

scrub(sum, function(obj, key, parent, type) {
if(type == number) {
total += obj
}
})

console.log(tota); // 10

Its also kinda cool that it can replace any other way of iterating. But don't use it unless you need to walk an unknown structure.

function count(obj) {
var c = 0;
scrub(obj, function() { c++ });
return c;
}

count([1,2,3]) // 3

count({a: 1, b: 2, c:, 3}) // 3

var crazy = {
a: {
b: {
c: {
d: {
e: [1, 2, 3, 4, {
f: 5,
g: {
h: {i: 6, j: k: 7, l: 8, m: 9}
}
}]
}
}
}
}
};

count(crazy) // 9