ee.Dictionary.map

Map an algorithm over a dictionary. The algorithm is expected to take 2 arguments, a key from the existing dictionary and the value it corresponds to, and return a new value for the given key. If the algorithm returns null, the key is dropped.

UsageReturns
Dictionary.map(baseAlgorithm)Dictionary
ArgumentTypeDetails
this: dictionaryDictionary

baseAlgorithmAlgorithm

Examples

Code Editor (JavaScript)

// A dictionary (e.g. results of ee.Image.reduceRegion of an S2 image).
var dict = ee.Dictionary({
  B1: 182,
  B2: 219,
  B3: 443
});

/**
 * Convert S2 surface reflectance units to native scale.
 */
function scale(key, value) {
  return ee.Number(value).divide(1e4);
}

print('S2 surface reflectance in native units', dict.map(scale));