object

问题 I have an array of JSON objects within my database (as depicted by the image below) How do I search for a specific value within it? Say I want the record where the "ends_at" field is equal to "2018-11-24 08:00:00" I've tried using ->where('column->starts_at', '2018-11-24 08:00:00') or even tried ->whereJsonContains('column->starts_at', '2018-11-24 08:00:00'). Within the model I've cast the column to an array - am I missing something, or can this not be done? 回答1: Use this: ->whereJsonContains

问题 I have an array of JSON objects within my database (as depicted by the image below) How do I search for a specific value within it? Say I want the record where the "ends_at" field is equal to "2018-11-24 08:00:00" I've tried using ->where('column->starts_at', '2018-11-24 08:00:00') or even tried ->whereJsonContains('column->starts_at', '2018-11-24 08:00:00'). Within the model I've cast the column to an array - am I missing something, or can this not be done? 回答1: Use this: ->whereJsonContains

问题 I have an array of JSON objects within my database (as depicted by the image below) How do I search for a specific value within it? Say I want the record where the "ends_at" field is equal to "2018-11-24 08:00:00" I've tried using ->where('column->starts_at', '2018-11-24 08:00:00') or even tried ->whereJsonContains('column->starts_at', '2018-11-24 08:00:00'). Within the model I've cast the column to an array - am I missing something, or can this not be done? 回答1: Use this: ->whereJsonContains

问题 I wanted to find out if my object is empty or not for all its nested objects and key-value pairs. for e.g., const x = { a:"", b:[], c:{ x:[] }, d:{ x:{ y:{ z:"" } } } }; this should be an empty object and if any of this contains single value then it should be non empty. 回答1: Here is the way to do what using recursion const x = { a:"", b:[], c:{ x:[] }, d:{ x:{ y:{ z:'' } } } }; function checkEmpty(obj){ for(let key in obj){ //if the value is 'object' if(obj[key] instanceof Object === true){

问题 I am trying to add newly created objects to an ArrayList in the constructor of a class. The new objects are being created in another class in the main method. Main method: public static void main(String[] args) { // TODO code application logic here Player p1 = new Player("Peter"); } My Player class: public class Player { protected static int age; protected static String name; protected static ArrayList players = new ArrayList(); Player(String aName) { name = aName; age = 15; players.add(new

问题 I am trying to add newly created objects to an ArrayList in the constructor of a class. The new objects are being created in another class in the main method. Main method: public static void main(String[] args) { // TODO code application logic here Player p1 = new Player("Peter"); } My Player class: public class Player { protected static int age; protected static String name; protected static ArrayList players = new ArrayList(); Player(String aName) { name = aName; age = 15; players.add(new

问题 I am trying to add newly created objects to an ArrayList in the constructor of a class. The new objects are being created in another class in the main method. Main method: public static void main(String[] args) { // TODO code application logic here Player p1 = new Player("Peter"); } My Player class: public class Player { protected static int age; protected static String name; protected static ArrayList players = new ArrayList(); Player(String aName) { name = aName; age = 15; players.add(new

问题 I am trying to add newly created objects to an ArrayList in the constructor of a class. The new objects are being created in another class in the main method. Main method: public static void main(String[] args) { // TODO code application logic here Player p1 = new Player("Peter"); } My Player class: public class Player { protected static int age; protected static String name; protected static ArrayList players = new ArrayList(); Player(String aName) { name = aName; age = 15; players.add(new

问题 I'm adapting a web scraping program from, http://danielfrg.com/blog/2013/04/01/nba-scraping-data/#disqus_thread, to scrape ESPN for baseball data into a CSV. However when I run the second piece of code to write a csv of games I get the 'NoneType' object has no attribute 'find_all' error, from the following section of code for index, row in teams.iterrows(): _team, url = row['team'], row['url'] r = requests.get(BASE_URL.format(row['prefix_1'], year, row['prefix_2'])) table = BeautifulSoup(r

问题 I'm adapting a web scraping program from, http://danielfrg.com/blog/2013/04/01/nba-scraping-data/#disqus_thread, to scrape ESPN for baseball data into a CSV. However when I run the second piece of code to write a csv of games I get the 'NoneType' object has no attribute 'find_all' error, from the following section of code for index, row in teams.iterrows(): _team, url = row['team'], row['url'] r = requests.get(BASE_URL.format(row['prefix_1'], year, row['prefix_2'])) table = BeautifulSoup(r