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140 lines (128 loc) 路 2.47 KB
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Copy patharray.js
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140 lines (128 loc) 路 2.47 KB
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import {
isArray,
isNil,
each
} from '@antv/util';
function merge(dataArray) {
let rst = [];
for (let i = 0, len = dataArray.length; i < len; i++) {
rst = rst.concat(dataArray[i]);
}
return rst;
}
function values(data, name) {
const rst = [];
const tmpMap = {};
for (let i = 0, len = data.length; i < len; i++) {
const obj = data[i];
const value = obj[name];
if (!isNil(value)) {
if (!isArray(value)) {
if (!tmpMap[value]) {
rst.push(value);
tmpMap[value] = true;
}
} else {
each(value, val => {
if (!tmpMap[val]) {
rst.push(val);
tmpMap[val] = true;
}
});
}
}
}
return rst;
}
function firstValue(data, name) {
let rst = null;
for (let i = 0, len = data.length; i < len; i++) {
const obj = data[i];
const value = obj[name];
if (!isNil(value)) {
if (isArray(value)) {
rst = value[0];
} else {
rst = value;
}
break;
}
}
return rst;
}
function groupToMap(data, fields) {
if (!fields) {
return {
0: data
};
}
const callback = function(row) {
let unique = '_';
for (let i = 0, l = fields.length; i < l; i++) {
unique += row[fields[i]] && row[fields[i]].toString();
}
return unique;
};
const groups = {};
for (let i = 0, len = data.length; i < len; i++) {
const row = data[i];
const key = callback(row);
if (groups[key]) {
groups[key].push(row);
} else {
groups[key] = [ row ];
}
}
return groups;
}
function group(data, fields, appendConditions = {}) {
if (!fields) {
return [ data ];
}
const groups = groupToMap(data, fields);
const array = [];
if (fields.length === 1 && appendConditions[fields[0]]) {
const values = appendConditions[fields[0]];
each(values, value => {
value = '_' + value;
array.push(groups[value]);
});
} else {
for (const i in groups) {
array.push(groups[i]);
}
}
return array;
}
function remove(arr, obj) {
if (!arr) {
return;
}
const index = arr.indexOf(obj);
if (index !== -1) {
arr.splice(index, 1);
}
}
function getRange(values) {
if (!values.length) {
return {
min: 0,
max: 0
};
}
const max = Math.max.apply(null, values);
const min = Math.min.apply(null, values);
return {
min,
max
};
}
export {
merge,
values,
firstValue,
group,
groupToMap,
remove,
getRange
};