Is there a way to trim all properties of an object? In other words, can I change that:
{a: ' a', b: 'b ', c: ' c '}
To this:
{a: 'a', b: 'b', c: 'c'}
It seems I can't map an object, so how can I apply a function to all properties an get the object back?
You can use Object.keys() method to iterate the object properties and update its values:
Object.keys(obj).forEach(k => obj[k] = obj[k].trim());
Demo:
var obj = {
a: ' a',
b: 'b ',
c: ' c '
};
Object.keys(obj).forEach(k => obj[k] = obj[k].trim());
console.log(obj);Edit:
If your object values can be of other data types(not only strings), you can add a check to avoid calling .trim() on non strings.
Object.keys(obj).forEach(k => obj[k] = typeof obj[k] == 'string' ? obj[k].trim() : obj[k]);
var obj = {
a: ' a',
b: 'b ',
c: ' c ',
d: 500
};
Object.keys(obj).forEach(k => obj[k] = typeof obj[k] == 'string' ? obj[k].trim() : obj[k]);
console.log(obj);
forEach would be preferable over map.
.map is designed for such things.map is used to return a new transformed array. Here we're just need to loop through and modify the obj.
You can use Object.keys to reduce and trim the values, it'd look something like this:
function trimObjValues(obj) {
return Object.keys(obj).reduce((acc, curr) => {
acc[curr] = obj[curr].trim()
return acc;
}, {});
}
const ex = {a: ' a', b: ' b', c: ' c'};
console.log(trimObjValues(ex));
You can do that by looping through it.
for(var key in myObject) {
myObject[key] = myObject[key].trim();
}
for...in will go up the prototype chain and iterate over all those properties too
if (typeof parsed_pg_request[key] == 'string') {}You can use a use reduce to create an object with the values you're looking for:
const test = {a: ' a', b: 'b ', c: ' c '}
const trimAllValues = input => Object.keys(input)
.reduce((prev, next) =>
Object.assign(prev, {
[next]: test[next].replace(/\s+/g, '')
}), {});
const result = trimAllValues(test)
console.log(result)Lodash's mapValues will be more performant and have better browser support. You can either use lodash, or alternatively have a look at their source and implement the same:
function mapValue(object, iteratee) {
object = Object(object)
const result = {}
Object.keys(object).forEach((key) => {
result[key] = iteratee(object[key], key, object)
})
return result
}
const object1 = {
a: ' somestring',
b: ' a',
c: 'a '
};
const newVals = Object.values(object1).map(val => val.trim());
console.log(newVals); //["somestring", "a", "a"]
JSON.stringify(obj, (k, v) => typeof v === 'string' ? v.trim() : v)