lodash

问题 how to compare two array value and remove the duplicate value and store another array using lodash for example var array1=['1', '2', '3', '4'] var array2=['5', '1', '8', '10', 3] var result = ['2','4','5','8','10'] 回答1: Just concat the arrays and check the indices from left and right side. If equal, take the unique value. This solution takes only '3' for both arrays. var array1 = ['1', '2', '3', '4'], array2 = ['5', '1', '8', '10', '3'], result = array1.concat(array2).filter((v, _, a) => a

问题 I have a use case where I have an object of varying values, and I need to get all of these keys that have a specific value. For instance, here is a sample object: myObject = { Person1: true, Person2: false, Person3: true, Person4: false }; The key names will vary, but the valid values are true or false. I want to get an array of the names that have a value of true: myArray2 = [ 'Person1', 'Person3 ]; I've been trying to use various lodash functions in combination such as _.key() and _.filter,

问题 I have text in the format var text = "{{A-B-C}{A-C-B}D-B}{E}F" //example 1 The text can be something else like: var text = "{{{A-B-C}{C-A-B}D-E}{B-C}E-A}{F}G" //example 2 So the node structure can change but the delimiting of - and {} remains the same to indicate heirarchy. I would like to create a tree out of this either as a javascript object or JSON for d3js tree layout. I can use lodash/jquery or any other library I wish. The eventual layout I need is like this image, for the var text

问题 I'm working with this structure: [ [ { "comments":"asd", "movement":"Back Squat", "userID":"wDHZv3OL55SIymHkhMUejNleNkx1", "weight":"330" } ], [ { "comments":"asd", "movement":"Bench Press", "userID":"wDHZv3OL55SIymHkhMUejNleNkx1", "weight":"100" } ], [ { "comments":"Comment", "movement":"Clean", "userID":"wDHZv3OL55SIymHkhMUejNleNkx1", "weight":"195" } ], [ ], [ ], [ { "comments":"Front squat comment alpha", "movement":"Front Squat", "userID":"wDHZv3OL55SIymHkhMUejNleNkx1", "weight":"315" }

问题 it would be best to first look at my code: import React, { Component } from 'react'; import _ from 'lodash'; import Services from 'Services'; // Webservice calls export default class componentName extends Component { constructor(props) { super(props); this.state = { value: this.props.value || null } } onChange(value) { this.setState({ value }); // This doesn't call Services.setValue at all _.debounce(() => Services.setValue(value), 1000); } render() { return ( <div> <input onChange={(event,

问题 it would be best to first look at my code: import React, { Component } from 'react'; import _ from 'lodash'; import Services from 'Services'; // Webservice calls export default class componentName extends Component { constructor(props) { super(props); this.state = { value: this.props.value || null } } onChange(value) { this.setState({ value }); // This doesn't call Services.setValue at all _.debounce(() => Services.setValue(value), 1000); } render() { return ( <div> <input onChange={(event,

问题 I follow this tutorial to add search to my Expo (React Native) app. After the last step I have this mistake:photo. What should I do? This is the part of the program. This is one of my navigation screens, where I have links for other screens: function InfoScreen({ navigation }) { return ( <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}> <Button title="Go back" onPress={() => navigation.goBack()} /> <View style={styles.container_new}> <Text style={styles.text}>Basic

问题 I'm currently struggling with react inputs and debounce from lodash. Most of the time when I have a form I also have an edit option, so I need a controlled component to fill back the inputs using value={state["targetValue"]} so I can fill and edit the field. However, if the component is controlled debounce isn't working. I made a simple example on CodeSandbox: https://codesandbox.io/embed/icy-cloud-ydzj2?fontsize=14&hidenavigation=1&theme=dark Code: import React, { Component } from "react";

问题 I have a function like this: const jsonObject = {a: {b: 'c'}}; const x = 'a.b'; const properties = x.split('.'); const item = properties.reduce((obj, prop) => obj && obj[prop], jsonObject); console.log(item); // prints 'c; This function, dynamically traverses the jsonObject and prints the value. This works fine, but this style of declaration doesn't support my environment. So I wan trying to convert this to function style declaration something like this: const item = properties.reduce

问题 I have a function like this: const jsonObject = {a: {b: 'c'}}; const x = 'a.b'; const properties = x.split('.'); const item = properties.reduce((obj, prop) => obj && obj[prop], jsonObject); console.log(item); // prints 'c; This function, dynamically traverses the jsonObject and prints the value. This works fine, but this style of declaration doesn't support my environment. So I wan trying to convert this to function style declaration something like this: const item = properties.reduce