10 examples of 'jquery reduce' in JavaScript

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97return function reduce( acc, data ) {
98 var i, j, A, B;
99
100 // [0] Increment the number of values:
101 acc.N += 1;
102
103 // [1] Compute the deltas where a delta is the difference between a new value and the corresponding dataset's current mean value...
104 for ( i = 0; i < numMeans; i++ ) {
105 accessor = accessors[ names[ i ] ];
106 deltas[ i ] = accessor( data ) - acc.means[ i ];
107 }
108
109 // [2] Update the covariance matrix...
110 for ( i = 0; i < numMeans; i++ ) {
111 for ( j = 0; j < numMeans; j++ ) {
112 A = acc.cov[i][j] * (acc.N-1);
113 B = (acc.N-1) / acc.N * deltas[i] * deltas[j];
114 acc.cov[i][j] = ( A + B ) / acc.N;
115 }
116 }
117
118 // [3] Update the means to incorporate the new values...
119 for ( i = 0; i < numMeans; i++ ) {
120 acc.means[ i ] += deltas[ i ] / acc.N;
121 }
122
123 return acc;
124}; // end FUNCTION reduce()
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67function reduce(array, reducer, index) {
68 return array.reduce(function(prev, current) {
69 return reducer(prev, current[index]);
70 }, array[0][index]);
71}
104function reduce(arr, fn){
105 var res = arr[0];
106 for(var i=1,l=arr.length;i<l;i++){
107 res = fn(res, arr[i]);
108 }
109 return res;
110}
12function reduce ( arr, fun, base ) {
13 return Array.prototype.reduce.call( arr, fun, base );
14}
52function reduceArr (arr, fn, baseObject = {}) {
53 return arr.reduce((acc, item) => {
54 const [k, v] = fn(item, acc)
55 acc[k] = v
56 return acc
57 }, baseObject)
58}
1function reduce(func, arr, memo) {
2 var len = arr.length,
3 i = 0,
4 accum = memo;
5
6 for (; i < len; i++) {
7 accum = func(accum, arr[i]);
8 }
9
10 return accum;
11}
102function reduce ( f, acc, iterable ) {
103 if ( !isDefined( iterable ) ) return acc;
104
105 return isArray( iterable )
106 ? reduceArray( f, acc, iterable )
107 : reduceObject( f, acc, iterable );
108}
30var reduce = function reduce(obj, index) {
31 if (!obj) {
32 return null;
33 }
34 return obj[index];
35};
371export function reduce(obj, func, value) {
372 for (const i in obj) {
373 value = func(value, obj[i], i);
374 }
375 return value;
376}
66function reduce() {
67 var delta = 0,
68 delta_n = 0,
69 term1 = 0;
70 /**
71 * FUNCTION: reduce( acc, data )
72 * Defines the data reduction.
73 *
74 * @private
75 * @param {object} acc - accumulation object containing the following properties: N, mean, M1, M2, M3. 'N' is the observatio number. 'mean' is the mean accumulator. 'M1' is the difference accumulator. 'M2' is the sum of squared difference accumulator. 'M3' is the cubed difference accumulator.
76 * @param {number} data - numeric stream data
77 * @returns {object} accumulation object
78 */
79 return function reduce( acc, x ) {
80 acc.N += 1;
81
82 delta = x - acc.mean;
83 delta_n = delta / acc.N;
84
85 term1 = delta * delta_n * (acc.N-1);
86
87 acc.M3 += term1*delta_n*(acc.N-2) - 3*delta_n*acc.M2;
88 acc.M2 += term1;
89 acc.M1 += delta;
90 acc.mean += delta_n;
91
92 return acc;
93 };
94} // end FUNCTION reduce()

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