Nodejs Utililty Methods Array Filter

List of utility methods to do Array Filter

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Description

The list of methods to do Array Filter are organized into topic(s).

Method

single(filter)
Array.prototype.single = function(filter) {
  var matches = this.filter(filter);
  if (matches.length == 0) {
    throw new Error("Expected 1 but found 0");
  if (matches.length > 1) {
    throw new Error("Expected 1 but found many");
  return matches[0];
...
singleOrNone(filter)
Array.prototype.singleOrNone = function(filter) {
  var matches = this.filter(filter);
  if (matches.length > 1) {
    throw new Error("Expected 1 but found many");
  if (matches.length == 0) {
    return null;
  return matches[0];
...