lodash

I have two arrays of objects that represent email addresses that have a label and a value: var original = [ { label: 'private', value: 'private@johndoe.com' }, { label: 'work', value: 'work@johndoe.com' } ]; var update = [ { label: 'private', value: 'me@johndoe.com' }, { label: 'school', value: 'schhol@johndoe.com' } ]; Now I want to compare and merge the two arrays by the label field, so that the result would look like this: var result = [ { label: 'private', value: 'me@johndoe.com' }, { label: 'work', value: 'work@johndoe.com' }, { label: 'school', value: 'schol@johndoe.com' } ] How can I do

I have an object that looks like this: var obj = { "objectiveDetailId": 285, "objectiveId": 29, "number": 1, "text": "x", "subTopics": [{ "subTopicId": 1, "number": 1 }, { "subTopicId": 2, "number": 32 }, { "subTopicId": 3, "number": 22 }] } var stToDelete = 2; I have lodash installed in my application for other things. Is there an efficient way to use lodash to delete the entry: {"subTopicId":2, "number":32} from the obj object? Or is there a javascript way to do this? As lyyons pointed out in the comments, more idiomatic and lodashy way to do this would be to use _.remove , like this _

I have an object with some keys, and I want to only keep some of the keys with their value? I tried with filter : var data = { "aaa":111, "abb":222, "bbb":333 }; var result = _.filter(data, function(value, key) { return key.startsWith("a"); }) console.log(result); But it prints an array: [111, 222] Which is not what I want. How to do it with lodash? Or something else if lodash is not working? Live demo: http://jsbin.com/moqufevigo/1/edit?js,output serg10 Lodash has a _.pickBy function which does exactly what you're looking for. var thing = { "a": 123, "b": 456, "abc": 6789 }; var result = _

I have been looking for a way to pass query parameters into an API call with the new HttpClientModule 's HttpClient and have yet to find a solution. With the old Http module you would write something like this. getNamespaceLogs(logNamespace) { // Setup log namespace query parameter let params = new URLSearchParams(); params.set('logNamespace', logNamespace); this._Http.get(`${API_URL}/api/v1/data/logs`, { search: params }) } This would result in an API call to the following URL: localhost:3001/api/v1/data/logs?logNamespace=somelogsnamespace However, the new HttpClient get() method doesn't have