About converting js string into corresponding variable

Well, this problem has really bothered me for a long time. How to use text characters corresponding to existing variables? For example, there are already two array variables array1 and array2, but I don’t know which one needs to be used. I can only know the name of the corresponding array "arra...

哈哈哈哈。 2019-04-19 15:27:35 0  1  1208

javascript - After angularjs obtains the backend data and assigns it to the member variable, the front console reports an error that the member variable is undefined.

After angularjs obtains the back-end data and assigns it to the member variable, the front-end console reports an error that the member variable is undefined. The error message is as follows: EXCEPTION: Error in ./ExerciseDetailComponent class ExerciseDetailComponent - inline template:3:12 caused...

巴扎黑 2017-05-19 10:09:49 0  1  514

html - How does assigning an array to a variable in javascript turn into a string? ?

I saw a small topic and used it to practice. I wanted to write the code smarter, but I ran into a trap and successfully obtained the object named name. However, I put the object into a two-dimensional array and assigned the value of the two-dimensional array. Given a variable, the variable becomes a...

怪我咯 2017-05-18 11:01:21 0  1  698

How to make the background of a sprite image white

background:url The background of the Sprite image becomes white

手机用户1568691356 2019-12-03 18:54:51 0  1  1261

javascript - How to turn an array into a negative number in php

1. I have an array array(1,2,3); I need it to become a negative number when inserting it into the database. 2. The front-end input table displays a positive number, and the back-end becomes a negative number before inserting it into the database. How to achieve this?

欧阳克 2017-06-12 09:22:42 0  3  857

java - When a member variable with the same name is called polymorphically, why is the member variable of the parent class accessed?

At first I guessed that since the member variables of the parent class and the subclass are each stored in the heap, it may be due to the existence of the parent class, so the member variables of the parent class are found first. Then I tested it, the code is as follows: {code...} The output is: Z:t...

女神的闺蜜爱上我 2017-06-12 09:27:03 0  2  992

java - What happens to the value of a static variable in Android after it is recycled?

For example {code...} When APP_NAME is recycled, will the value of APP_NAME become null or an uncertain mess of values?

大家讲道理 2017-05-27 17:40:18 0  2  678

javascript - The font on the mobile web page turns blue and automatically becomes a hyperlink. How can I disable it? ? ? ?

There is no href written, and sometimes it automatically becomes a hyperlink.

巴扎黑 2017-05-16 13:42:25 0  3  971

How to convert multi-dimensional array into one-dimensional array in thinkphp?

Array({code...}) I only want 1 and 22. How can it become $a=array('1','22');

天蓬老师 2017-05-16 13:13:51 0  3  422

The icon in front of the php file in PhpStorm changes to file

The icon in front of the php file in PhpStorm changed to file. When creating the file, I accidentally entered the suffix php, and then I didn’t know where I clicked. After that, the icon in front of the file changed from a circle plus a C to something like this. Why? Get it back

曾经 2022-03-01 17:51:56 0  3  1740

objective-c - How to assign values ​​to member variables

We all know that the assignment of attributes is to call the setter method of the attribute, but how are member variables assigned? What is its internal implementation principle?

怪我咯 2017-05-02 09:27:14 0  2  565

php - After json_encode, the Chinese characters saved in the database become unicode. How is the length calculated?

I found that after json_encode, the Chinese characters in the array were saved in the database and became unicode. For example: "I am a Chinese" becomes: {code...} Originally "I am a Chinese" has a total of 10 characters. After it becomes unicode, will it only remember 30 charact...

某草草 2017-05-16 13:08:03 0  2  470

angular.js - angularjs realizes double-clicking the span tag and turning the span tag into an input tag?

There are multiple span tags on the page, and each span tag is bound to a double-click event. How to implement it in the double-click event to change the span tag that is double-clicked into an input tag, and at the same time, the value in the span tag becomes that of the input tag. value?

怪我咯 2017-05-15 16:55:25 0  4  924

Programming - How to turn a python program into a website

Please tell me how to turn the function of a program originally written in python into a website and use this function on a web page? Thanks!

淡淡烟草味 2017-05-18 10:47:33 0  6  895

How to turn a website into a mobile app?

I'm building a website using Vue.js. Now I'm trying to turn the website into a mobile app (one for iOS and one for Android). I'd like to know what is the way to accomplish this transition with minimal effort. In my search, I found a few services like AppMySite that claimed to do the job, but I wasn'...

P粉638343995 2023-07-28 22:52:13 0  1  561

How to use git to turn an existing directory into a warehouse

There is a folder A on the server side with many files in it. I want to turn it into a warehouse (that is, it contains a .git), but I entered git --bare init in the B.git folder. How can I use A as the warehouse of B? ? ?

给我你的怀抱 2017-05-02 09:49:13 0  2  748

java - Why are the member variables in the interface not constants?

{Code...} Doesn’t it mean that the member variables in the interface are constants? Why can't I use the prompt to require constants on the case?

phpcn_u1582 2017-06-23 09:13:11 0  4  873

I don't know why git bash has become like this, what should I do?

My git bash suddenly became like this. It is very difficult to use and the delete key cannot be used. What should I do? ? ? Were there always paths in the past? ?

高洛峰 2017-05-02 09:49:56 0  2  674

java - maven project, will the Dynamic Web Module be changed to 3.1 every time I use update project?

Every time I update the eclipse environment, it will change Dynamic Web Module 3.0 to 3.1, and the jdk is also 1.7.

我想大声告诉你 2017-06-10 09:47:58 0  2  887

How does it become <html></html> after entering <html><>?

How does it become <html></html> after entering <html><>?

汁汁 2019-05-07 23:00:03 0  4  1894