Revisions to Converting an object to an array of objects

replaced http://stackoverflow.com/ with https://stackoverflow.com/

Source Link

edited May 23, 2017 at 12:40

1

When defining propertyArray, you don't need to handle undefined explicitly. (It would have been nice to use _.pluck(), but unfortunately it is designed to take arguments in the wrong order.)

_.object() is too delicious to pass up! You basically reimplemented it as createObject(). The function that is passed to map() can be further simplified by currying currying.

var input = {
  key1: [ 'val1', 'val2', 'val3' ],
  key2: [ 'val4', 'val5', 'val6' ],
  key3: [ 'val7', 'val8', 'val9' ]
};

window.alert("INPUT:\n" + JSON.stringify(input, null, '  '));

function zipObj(obj) {
  var keys = _.keys(obj);
  var values = _.map(keys, function(k) { return obj[k]; });

  // Transpose the values matrix
  var valueSlices = _.zip.apply(_, values);
  return _.map(valueSlices, _.partial(_.object, keys));
}

window.alert("OUTPUT:\n" + JSON.stringify(zipObj(input), null, '  '));

<script src="//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.7.0/underscore-min.js"></script>

I suspect that var values = … could be simplified as _.values(obj), but I don't see anything in the Underscore.js documentation that guarantees that _.values(obj) will list the values in the same order as _.keys(obj), so I hesitate to recommend it.

When defining propertyArray, you don't need to handle undefined explicitly. (It would have been nice to use _.pluck(), but unfortunately it is designed to take arguments in the wrong order.)

_.object() is too delicious to pass up! You basically reimplemented it as createObject(). The function that is passed to map() can be further simplified by currying.

var input = {
  key1: [ 'val1', 'val2', 'val3' ],
  key2: [ 'val4', 'val5', 'val6' ],
  key3: [ 'val7', 'val8', 'val9' ]
};

window.alert("INPUT:\n" + JSON.stringify(input, null, '  '));

function zipObj(obj) {
  var keys = _.keys(obj);
  var values = _.map(keys, function(k) { return obj[k]; });

  // Transpose the values matrix
  var valueSlices = _.zip.apply(_, values);
  return _.map(valueSlices, _.partial(_.object, keys));
}

window.alert("OUTPUT:\n" + JSON.stringify(zipObj(input), null, '  '));

<script src="//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.7.0/underscore-min.js"></script>

I suspect that var values = … could be simplified as _.values(obj), but I don't see anything in the Underscore.js documentation that guarantees that _.values(obj) will list the values in the same order as _.keys(obj), so I hesitate to recommend it.

When defining propertyArray, you don't need to handle undefined explicitly. (It would have been nice to use _.pluck(), but unfortunately it is designed to take arguments in the wrong order.)

_.object() is too delicious to pass up! You basically reimplemented it as createObject(). The function that is passed to map() can be further simplified by currying.

var input = {
  key1: [ 'val1', 'val2', 'val3' ],
  key2: [ 'val4', 'val5', 'val6' ],
  key3: [ 'val7', 'val8', 'val9' ]
};

window.alert("INPUT:\n" + JSON.stringify(input, null, '  '));

function zipObj(obj) {
  var keys = _.keys(obj);
  var values = _.map(keys, function(k) { return obj[k]; });

  // Transpose the values matrix
  var valueSlices = _.zip.apply(_, values);
  return _.map(valueSlices, _.partial(_.object, keys));
}

window.alert("OUTPUT:\n" + JSON.stringify(zipObj(input), null, '  '));

<script src="//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.7.0/underscore-min.js"></script>

I suspect that var values = … could be simplified as _.values(obj), but I don't see anything in the Underscore.js documentation that guarantees that _.values(obj) will list the values in the same order as _.keys(obj), so I hesitate to recommend it.

Fixed issue with code snippet. Should be using the object passed into method, not the variable defined outside of method.

Source Link

edit approved Dec 1, 2014 at 20:29

AlbertEngelB

175
1
1
7

When defining propertyArray, you don't need to handle undefined explicitly. (It would have been nice to use _.pluck(), but unfortunately it is designed to take arguments in the wrong order.)

_.object() is too delicious to pass up! You basically reimplemented it as createObject(). The function that is passed to map() can be further simplified by currying.

var input = {
  key1: [ 'val1', 'val2', 'val3' ],
  key2: [ 'val4', 'val5', 'val6' ],
  key3: [ 'val7', 'val8', 'val9' ]
};

window.alert("INPUT:\n" + JSON.stringify(input, null, '  '));

function zipObj(obj) {
  var keys = _.keys(obj);
  var values = _.map(keys, function(k) { return input[k];obj[k]; });

  // Transpose the values matrix
  var valueSlices = _.zip.apply(_, values);
  return _.map(valueSlices, _.partial(_.object, keys));
}

window.alert("OUTPUT:\n" + JSON.stringify(zipObj(input), null, '  '));

<script src="//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.7.0/underscore-min.js"></script>

I suspect that var values = … could be simplified as _.values(obj), but I don't see anything in the Underscore.js documentation that guarantees that _.values(obj) will list the values in the same order as _.keys(obj), so I hesitate to recommend it.

When defining propertyArray, you don't need to handle undefined explicitly. (It would have been nice to use _.pluck(), but unfortunately it is designed to take arguments in the wrong order.)

_.object() is too delicious to pass up! You basically reimplemented it as createObject(). The function that is passed to map() can be further simplified by currying.

var input = {
  key1: [ 'val1', 'val2', 'val3' ],
  key2: [ 'val4', 'val5', 'val6' ],
  key3: [ 'val7', 'val8', 'val9' ]
};

window.alert("INPUT:\n" + JSON.stringify(input, null, '  '));

function zipObj(obj) {
  var keys = _.keys(obj);
  var values = _.map(keys, function(k) { return input[k]; });

  // Transpose the values matrix
  var valueSlices = _.zip.apply(_, values);
  return _.map(valueSlices, _.partial(_.object, keys));
}

window.alert("OUTPUT:\n" + JSON.stringify(zipObj(input), null, '  '));

<script src="//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.7.0/underscore-min.js"></script>

I suspect that var values = … could be simplified as _.values(obj), but I don't see anything in the Underscore.js documentation that guarantees that _.values(obj) will list the values in the same order as _.keys(obj), so I hesitate to recommend it.

When defining propertyArray, you don't need to handle undefined explicitly. (It would have been nice to use _.pluck(), but unfortunately it is designed to take arguments in the wrong order.)

_.object() is too delicious to pass up! You basically reimplemented it as createObject(). The function that is passed to map() can be further simplified by currying.

var input = {
  key1: [ 'val1', 'val2', 'val3' ],
  key2: [ 'val4', 'val5', 'val6' ],
  key3: [ 'val7', 'val8', 'val9' ]
};

window.alert("INPUT:\n" + JSON.stringify(input, null, '  '));

function zipObj(obj) {
  var keys = _.keys(obj);
  var values = _.map(keys, function(k) { return obj[k]; });

  // Transpose the values matrix
  var valueSlices = _.zip.apply(_, values);
  return _.map(valueSlices, _.partial(_.object, keys));
}

window.alert("OUTPUT:\n" + JSON.stringify(zipObj(input), null, '  '));

<script src="//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.7.0/underscore-min.js"></script>

I suspect that var values = … could be simplified as _.values(obj), but I don't see anything in the Underscore.js documentation that guarantees that _.values(obj) will list the values in the same order as _.keys(obj), so I hesitate to recommend it.

Source Link

answered Nov 25, 2014 at 3:45

200_success

145.6k
22
191
481

When defining propertyArray, you don't need to handle undefined explicitly. (It would have been nice to use _.pluck(), but unfortunately it is designed to take arguments in the wrong order.)

_.object() is too delicious to pass up! You basically reimplemented it as createObject(). The function that is passed to map() can be further simplified by currying.

var input = {
  key1: [ 'val1', 'val2', 'val3' ],
  key2: [ 'val4', 'val5', 'val6' ],
  key3: [ 'val7', 'val8', 'val9' ]
};

window.alert("INPUT:\n" + JSON.stringify(input, null, '  '));

function zipObj(obj) {
  var keys = _.keys(obj);
  var values = _.map(keys, function(k) { return input[k]; });

  // Transpose the values matrix
  var valueSlices = _.zip.apply(_, values);
  return _.map(valueSlices, _.partial(_.object, keys));
}

window.alert("OUTPUT:\n" + JSON.stringify(zipObj(input), null, '  '));

<script src="//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.7.0/underscore-min.js"></script>

I suspect that var values = … could be simplified as _.values(obj), but I don't see anything in the Underscore.js documentation that guarantees that _.values(obj) will list the values in the same order as _.keys(obj), so I hesitate to recommend it.

Stack Exchange Network

Return to Answer