Error NG0900 An error occurred while trying to compare. Only arrays and iterable objects allowed

Using *ngFor I am able to render the data but it throws this error Error: NG0900: An error occurred while trying to compare '[objectObject]'. Only arrays and iterable objects are allowed This is my service method asyncgetEditions():Promise<Observable<Cigales>>{returnthis.http.get<Ciga...

P粉226667290 2024-02-25 19:15:04 0  1  470

Can vscode do code checking for js?

I used sublime before, which can prompt js errors. Now I am using vscode. I would like to know if there is a plug-in that can report js code errors?

ringa_lee 2017-05-19 10:43:43 0  1  689

javascript - What is the role of weak set in ES6?

Weak set is not iterable and cannot use for-of, keys(), values(), forEach() to traverse values. So what is its function? Is it just about storing objects?

某草草 2017-05-19 10:43:42 0  1  561

javascript - Vue.js uses functions to operate properties of objects in data without triggering updates

I encountered this problem when learning the Vue.js framework. In the object iteration part of list rendering, I put an object object in the data and a button element in the li element to delete the attributes corresponding to the iteration, but after clicking the button , the corresponding attribut...

淡淡烟草味 2017-05-18 10:46:34 0  1  496

**Error type: Unable to iterate 'NoneType' object**

I want to use ssh tunnel to access Mysql database. Unfortunately, the architecture of this code does not seem to support my query format, as the function does not appear to be compatible with my query format. /Users/peter/PycharmProjects/MySqlLocalhostTest/venv/lib/python3.10/site-packages/paramiko/...

P粉141035089 2024-04-06 10:26:38 0  1  541

A usage in python is unclear

In the process of writing a crawler in Python (crawling Wikipedia entries), the url["href"] appeared during the output process of using the iterator. I thought it should belong to a usage in the iterator, but I couldn't find it. Please help me with this usage. I mean, thank you for the url...

阿神 2017-05-18 10:59:46 0  1  792

Display value of HTML range slider using JS

The JS for displaying HTML range slider values ​​works fine for the first item (A1). However, I also want to use it for A2 projects (actually there are 20 projects, so it needs to be reused 19 times). Is there a way to code for multiple iterations? constslideValue=document.querySelector("span&q...

P粉988025835 2023-09-13 00:42:58 0  1  618

React error: Item is not iterable when adding to state

I'm currently trying to use the spread operator to push items into an array in React, but I'm getting the following error. The error occurs in the PhotoUploader component within PlacesForm.jsx. I've included the code into the component below. PlacesForm.jsx: importaxiosfrom'axios'importReact,{useEff...

P粉709644700 2024-03-27 17:49:53 0  1  486

Display nested array of objects in HTML table by iterating

I have the following input containing an array of nested objects. summary is the parent object array, run_type is the nested object array. letinput={"summary":[{"name":"Release","run_type":[{"environment":"6nc","type&quot

P粉638343995 2024-04-05 14:11:42 0  1  1542

python - How to get value in nested function

Suppose there is such a piece of code: {code...} Now I hope that the values ​​of a and b in the demo can be obtained without making any modifications to the code in the demo function when an exception occurs.

PHP中文网 2017-05-18 10:55:41 0  3  779

typescript object literal type definition

I want to use typescript to define an object. The object can have any properties, but when accessing the properties, an error will be reported, showing that Property "a" does not exist on type Object. Is there a way to define such an object? {code...}

为情所困 2017-07-05 11:07:22 0  2  1118

javascript - How does JQuery get the ID of the current element through the dot mark button (how to get the ID of dynamic data)

1. The image in the picture and the candidate information displayed are all iterated by DataList. The purpose is to obtain the corresponding examination time, subject code and other information by clicking the mark button. To achieve this, click the mark button to send the current candidate's inform...

PHP中文网 2017-05-19 10:18:00 0  2  768

How does php parse xml tags that have both values ​​and attributes?

When using: {code...} to parse XML into an array, both: {code...} and {code...} can be parsed correctly, but for this: {code...} just The name attribute cannot be obtained, but only the content content can be obtained. Is there any good way to deal with this problem...

巴扎黑 2017-06-14 10:50:11 0  1  763

Using TensorFlow to create a logistic regression model training results are nan

In TensorFlow, I want to create a logistic regression model with the following cost function: The screenshot of the data set used is as follows: My code is as follows: {code...} The screenshot of the running result is as follows: As you can see, after iterating twice, we get Both W and b have become...

代言 2017-06-28 09:23:45 0  1  1116

javascript - Urgent! Waiting online! Problem with linkage display of checkbox list?

{code...} {code...} [ {code...} ]; {code...} [ {code...} ]; Note: The parentId in array b corresponds to the id in array a. Now When you click an item in the A checkbox list, the B checkbox list will display the record corresponding to the parentId based on the id value checked in the A checkbox lis...

代言 2017-06-26 10:50:20 0  3  882

javascript - js natively determines dom element type

The problem is this {code...} Now we need to determine what type of ele it is and write it like this, that is, if I input a label 'a', it means label, #a means id, .a means class and perform the corresponding operation { Code...} The code is like this because there may be at least one element in the...

给我你的怀抱 2017-05-18 10:47:59 0  1  653

How to find JSON data based on other content in a JSON object when duplicates exist?

I'm currently implementing some data charts on a website, and I have a JSON that contains some data, specifically some ID numbers, some dates, and some data points. Because I have multiple dates under the same ID, I'm looking for a way to do essentially "find a JSON object with this ID and mont...

P粉713846879 2024-04-04 10:57:45 0  1  559