Nodejs Array Flat Map flatMap(lambda)

Here you can find the source of flatMap(lambda)

Method Source Code

Array.prototype.flatMap = Array.prototype.flatMap || function(lambda) {
  return Array.prototype.concat.apply([], this.map(lambda));
}

Related

  1. flatMap(callback)
    Array.prototype.flatMap = function(callback) {
      var inputArray = this;
      var start = function(value, index, length) {
        flatEach(value.shift());
        ++index != length && start(value, index, length);
        return value;
      var flatEach = function(eachValue) {
        return Array.isArray(eachValue) ? start(eachValue, 0, eachValue.length) : inputArray.push(callback(eachValue));
    ...
    
  2. flatMap(cb)
    Array.prototype.flatMap = function (cb) {
      return this.map(cb).reduce(function (arr, c) { return arr.concat(c); }, []);
    };
    
  3. flatMap(fn, ctx)
    Array.prototype.flatMap = function(fn, ctx) {
      return this.reduce((k, v) => k.concat(fn.call(ctx, v)), []);
    };
    
  4. flatMap(lambda)
    Array.prototype.flatMap = function(lambda) { 
          return Array.prototype.concat.apply([], this.map(lambda)); 
    };
    
  5. flatMap(lambda)
    Array.prototype.flatMap = function(lambda) {
        return [].concat(this.map(lambda));
    };
    
  6. flatMap(mapFunc)
    Array.prototype.flatMap = function(mapFunc) {
      var result = []
      for (let item of this) {
        let tokens = mapFunc(item)
        result = result.concat(tokens)
      return result
    
  7. flatMap(projection)
    Array.prototype.flatMap = function(projection) {
        return this.
            map(function(item) {
                return projection(item);
            }).
            mergeAll();