mongodb有哪些技巧可替代ORM的关联表查询

在尽量减少查询数据库次数的情况下，mongodb有哪些查询操作或表结构设计的技巧可替代ORM的关联表查询，不使用DBRef。

天蓬老师 2017-04-24 15:59:42 0  1  675

JavaScript Tips: How to Determine Browser Window Position

For various silly reasons, I want to be able to detect a rectangular area of ​​the browser window on the screen, including the title bar. Is this possible, or is JavaScript only limited to the viewport of its page? EDIT: I may not have expressed it clearly, but the viewport is the part of the page t...

P粉218775965 2023-08-22 15:53:05 0  2  663

Resetting the visibility of "startButtonGame" is the only problem; everything else works fine

I'm developing a blackjack game. So far, everything is working fine except this small detail. Basically, the start game button should only be visible before the game and after the game. I have no problem setting it to hidden, but when I finish a game it doesn't work. functionstartGame(){startGameBut...

P粉614840363 2023-09-19 22:02:31 0  1  747

javascript - js common news continuous scrolling

Why is the scrolling here discontinuous {code...}

我想大声告诉你 2017-05-19 10:40:12 0  3  633

javascript - Vue2.0 How to get the index in the event without v-for loop?

RT In addition to using native, are there any methods and techniques that come with Vue? Thanks~

phpcn_u1582 2017-05-19 10:29:29 0  4  670

How to get the current running mode of php?

There are five common SAPI patterns: {code...}

为情所困 2017-07-03 11:40:17 0  1  758

Ionic image loading tips

I'm just playing around with Ionic and Vue3. But when I use the ion-img tag, the images loaded from the assets folder are not displayed correctly. Folder structure: -assets--logo.svg-views--Authentication.vue When I load the image using standard HTMLimg it works fine, but not when using ion-img. <...

P粉416996828 2023-08-26 20:03:50 0  1  613

What are the tips for learning PHP?

How can I quickly learn PHP to find a job?

心意 2018-09-23 21:18:49 0  1  1389

PHP Chinese website large-scale live broadcast public welfare free class registration post. . .

PHP Chinese website’s free public welfare live broadcast class in June is facing 6.18. Instead of frantically buying your hands, it is better to study quietly. We have carefully prepared two free live broadcast courses for you: 1. One-week introduction to Web front-end development 1. Course name: [X...

PHP中文网 2018-06-04 13:03:08 32  848  64436

What are the common applications of the linux file command?

This command seems to be used less frequently.

巴扎黑 2017-05-16 13:28:06 0  2  614

javascript - Is there a better mobile web instant messaging UI framework?

1. Mobile terminal usage 2. Common IM communication interfaces

代言 2017-06-12 09:32:08 0  2  698

javascript - In js, what are the usage scenarios of comma ","?

As the title states, apart from declaring variables as intervals, using commas in arrays and json, what other usage scenarios or techniques are there?

给我你的怀抱 2017-05-16 13:24:46 0  4  811

Alibaba Java Development Manual——Comparator

The picture above is the description in "Alibaba Java Development Manual v1.2.0". Here is a counterexample, saying that equality is not handled, but I think: {code...} The other way around is {code...} I usually use it like this. Could you please help me explain the technique here? what is...

PHPz 2017-05-27 17:40:39 0  3  1034

How Python uses Selenium or PhantomJS to crawl dynamic web content

If you want to use Python to do quantitative stock trading, the first step is to obtain the historical data of the stock. Visit the http://data.eastmoney.com/sto... web page. After opening the source code of the web page, you cannot see the data in the table. It is said that it is loaded using ajax ...

黄舟 2017-05-18 11:01:14 0  3  1001

Can an uninstantiated static object also call non-static methods in a class?

There is a very common code: System.out.println. This is a very common output statement, but after studying it for a while, I suddenly remembered to look at the source code. The following is the source code: {Code...} out is in the System class Defined, not instantiated yet, out is just a null varia...

为情所困 2017-05-17 10:07:52 0  5  692