@tangential/core
Version:
Core types and support code for Tangential
63 lines • 7.48 kB
JavaScript
export class ObjMapUtil {
static fromKeyedEntityArray(values, keyField = '$key') {
values = values || [];
const m = {};
for (let i = 0; i < values.length; i++) {
m[values[i][keyField]] = values[i];
}
return m;
}
static toArray(map) {
return Object.keys(map).map((key) => {
return map[key];
});
}
static toKeyedEntityArray(map, keyField = '$key') {
return Object.keys(map).map((key) => {
const keyObj = {}; // semicolon actually required here.
keyObj[keyField] = key;
return Object.assign({}, map[key], keyObj);
});
}
static toTruthMap(map) {
const result = {};
Object.keys(map).forEach((key) => {
result[key] = true;
});
return result;
}
static addAll(map, mapB, noOverwrite = false) {
map = map || {};
mapB = mapB || {};
Object.keys(mapB).forEach((key) => {
if (noOverwrite && map[key] !== undefined) {
throw new Error(`Key already exists on map, cannot replace: ${key}.`);
}
map[key] = mapB[key];
});
return map;
}
static removeAll(map, mapB) {
Object.keys(mapB).forEach((key) => {
if (map[key] !== undefined) {
delete map[key];
}
});
}
/**
* Remove the child fields from the provided map.
* @param map
* @param fields {string[]}
* @returns {ObjMap<V>}
*/
static deleteValueFields(map, fields = ['$key']) {
map = map || {};
fields.forEach((fieldKey) => {
Object.keys(map).forEach((key) => {
delete map[key][fieldKey];
});
});
return map;
}
}
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