parent-child

问题 Consider the following json: { a: { b: { c: 1, d: 2 } } } How can I move all the properties of b to be under the parent a: { a: { c: 1, d: 2, b: {} } } 回答1: For this particular case, you could do this: $ jq '.a |= (.b = {}) + .b' input.json Here we're updating object a with the original contents with b replaced with an empty object and combining it with the contents of the original b . If that was too hard to reason about, this might be easier to follow: $ jq '.a |= with_entries(if .key == "b

问题 I am using Spring 3.2 and hibernate-core 4.1.4 and hibernate-jpa-2.0.1. The application resource file has all the correct objects. I have a child object RoleEntity, and it has two parents: User and Award, so the userId and the awardId are foreign-keys that already exist, and MUST exist for the role entity to be created. public class RoleEntity implements Serializable { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "role_id") private long roleId; @Column(name = "role

问题 What is the proper method to determine whether the root view (top level) controller of a navigation stack is appearing as a result of being initially presented vs. being uncovered? The iOS documentation suggests using isMovingToParentViewController inside viewWill/DidAppear: to make that determination. This works for view controllers pushed on the stack, but appears to always return FALSE for the stack root view controller. Thanks for helping. 回答1: Looks like someone else has answered the

问题 Having two simple classes; one with only parent attribute, and one with both parent and children attributes. This means that the one with both parent and children inherits from the one with only parent . Here's the class with only parent attribute. Let's call it Child since it can only be a child, not a parent. I'll use a method set_parent() to make it more clear, but I would use a setter in my actual code. class Child(object): def __init__(self, parent=None): self.__parent = None self.set

问题 I'm starting to learn some C and while studying the fork, wait functions I got to a unexpected output. At least for me. Is there any way to create only 2 child processes from the parent? Here my code: #include <sys/types.h> #include <stdio.h> #include <unistd.h> #include <sys/wait.h> int main () { /* Create the pipe */ int fd [2]; pipe(fd); pid_t pid; pid_t pidb; pid = fork (); pidb = fork (); if (pid < 0) { printf ("Fork Failed\n"); return -1; } else if (pid == 0) { //printf("I'm the child\n

问题 I have a number of Matters which are in a parent/child relationship. Each has a pointer to their parent matter, or null if they are the parent. Each matter can have a payment made, but all payments in a parent/child relationship are shared between both parent and child. A simplified version of my tables is: Matter | ID | Value | ParentID | -------------------------------------- | 1 | 200 | 0 | | 2 | 200 | 1 | | 3 | 300 | 0 | | 4 | 200 | 1 | | 5 | 800 | 0 | Payment | ID | Value | MatterID | --

问题 I have a number of Matters which are in a parent/child relationship. Each has a pointer to their parent matter, or null if they are the parent. Each matter can have a payment made, but all payments in a parent/child relationship are shared between both parent and child. A simplified version of my tables is: Matter | ID | Value | ParentID | -------------------------------------- | 1 | 200 | 0 | | 2 | 200 | 1 | | 3 | 300 | 0 | | 4 | 200 | 1 | | 5 | 800 | 0 | Payment | ID | Value | MatterID | --

问题 I have a very long form with groups of fields. When a radio field is selected, I need it to also select several "hidden" fields in the same div and to pass those values on submission. If another radio is selected, than these hidden fields need to clear, and instead the other group's are selected. Example 1 - Radio 1 is selected which selects all hidden fields in same div/fieldset: Group A: Radio 1 (checked) Hidden Field 1a (checked) Hidden Field 1b (checked) Hidden field 1c (checked) Group B:

问题 I have a very long form with groups of fields. When a radio field is selected, I need it to also select several "hidden" fields in the same div and to pass those values on submission. If another radio is selected, than these hidden fields need to clear, and instead the other group's are selected. Example 1 - Radio 1 is selected which selects all hidden fields in same div/fieldset: Group A: Radio 1 (checked) Hidden Field 1a (checked) Hidden Field 1b (checked) Hidden field 1c (checked) Group B:

问题 Okay so here's what I'm trying to achieve : I have this component : import { Component, Output, EventEmitter, OnInit } from '@angular/core'; @Component({ selector: 'like', template: '<p>this is the like component<p>' }) export class LikeComponent implements OnInit{ title: string = 'Like Component'; @Output() sendTitle = new EventEmitter(); ngOnInit() { this.sendTitle.emit({title: this.title}); } } I want to send the title from it to the parent : import { Component, Input } from '@angular/core