What does: self/Test mean after the function?

public static function Test():slef { //Function body }public static function Test():slef{ //Function body}What does: self or: Test here mean?

拉拉韦尔 2020-06-17 08:53:37 0  1  1974

javascript - How to understand the sentence that the constructor is the unique identifier of the prototype? What's the meaning

How do you understand the sentence that the constructor is the unique identifier of the prototype? What's the meaning

phpcn_u1582 2017-05-19 10:14:57 0  1  489

javascript - I don't quite understand what the form of function parameters means

export class HashHistory extends History { constructor (router: VueRouter, base: ?string, fallback: boolean) { {code...} } What does the key-value pair format in the constructor parameter in the above code mean when it is written, where " base: ? ...

为情所困 2017-07-05 10:47:09 0  2  865

javascript - Regarding the statistics of the number of times a certain character appears in a string, I saw a piece of code online and there is a part in it that I don't understand what it means.

Today I used the split() method to count the number of times a certain character appears in a string. By the way, I checked Baidu to see if there are other methods. I saw the following function, but the count++; offset += subStr .length; I don’t understand what it means. Seniors passing by please...

迷茫 2017-06-12 09:33:03 0  1  995

What is the equivalent function in PHP that implements the 'requests.post' functionality in Python?

I need help translating python code to PHP. This is how the script is set up to communicate with the API server, using POST to log in in this part of the code. The Python code has been tested and works, but I can't figure out exactly which way I should convert it to PHP because I'm getting an empty ...

P粉495955986 2024-03-28 14:48:16 0  1  347

How to interpret this semaphore?

What exactly does the lock function here mean? ? Why is sembuf.sem_op -1 instead of 1 when unlocked? ?

習慣沉默 2017-06-07 09:24:21 0  1  782

Questions about php objects.

When using the API of KIRBY (a CMS), I found the following writing method: {code...} What does this writing method mean? Is it a function nested in the object?

淡淡烟草味 2017-05-31 10:34:18 0  1  523

laravel - How to understand Closure $next when defining middleware

{Code...} In the above code, 1) the closure in use Closure in the third line is a class? how come? 2) What does Closure $next mean in the handle method on line 6? 3) $next($request) on line 9, what is the usage? Is $next a function or a variable?

迷茫 2017-05-16 16:54:35 0  2  641

laravel - Confused about php syntax?

As shown in the figure: method => function. what does this mean? Supplement: Thank you everyone, my brain is rusty. . .

三叔 2017-06-16 09:18:55 0  5  774

Explore the functionality of the "next" function in Express middleware and its role in redirecting to another function.

I'm new to Nodejs and working on Expressjs and now I'm working on "middleware functions" for a specific route and I want to know "what does next do", means after verifying what the "next" function can do? If we want to move/redirect to another function then how do we do...

P粉195402292 2024-04-02 21:02:16 0  1  403

How do I know which table to use after linking to the database?

I don’t understand what these two paragraphs mean. Check whether there is this user in the table, but there is more than one table in my database. How to specify $map = ['username'=>$userName]; $admin = Admin::get($ map);

萨格拉斯 2020-04-11 19:31:32 0  1  845

Please give me some answers

$rep = "<?php echo \$vars['\1']; ?>";$vars is an associative array. What does \$vars['\1'] in this code mean? Please explain.

ぅBonnenul° 2019-10-31 23:33:10 0  0  844

gvim - How to jump to the definition (declaration) of a custom function when editing a vimrc file in vim?

When editing a vimrc file in vim, what shortcut key can be pressed to jump from the place where a custom function (written by vimscript) is called to the place where the custom function is defined (declared)? Is there any shortcut key without installing a plug-in like ctags? Note, press K (i.e. shif...

为情所困 2017-05-16 16:36:16 0  1  740

What does TSRMLS_CC at the end of some function parameters in PHP source code mean?

For example, in the code below, what does it mean that Z_LVAL_PP(arg) is followed by TSRMLS_CC? zend_rsrc_list_get_rsrc_type(Z_LVAL_PP(arg) TSRMLS_CC);

淡淡烟草味 2017-06-05 11:07:11 0  1  461

javascript - What does the following function writing mean?

A function defined in mutations in vuex calls {code...} {code...} in the component. My question is why there is no need to pass in the state parameter when calling the setCart function. Visually, if it does not If you pass the state parameter, the addCart function will automatically...

我想大声告诉你 2017-06-26 10:56:52 0  2  704

What does self in class in Python mean?

{Code...} What does this self mean:?

大家讲道理 2017-06-15 09:21:25 0  2  1095

Can two functions in a js file call each other?

I would like to ask my seniors, I wrote two functions in a js file. Both work fine when used alone, but when I call one within the other, The called function doesn't work, why? The code is as follows: function aa() { some code; bb(); }function bb(){some code;}

享耳 2019-05-04 21:38:14 0  2  1327

linux - I am looking at some C functions. What do these bitwise ORs mean?

I'm learning C recently and I saw that some functions use bitwise or bitwise to pass parameters. I don't quite understand what it means, and bitwise operations seem to be rarely used in daily work. For example, the following piece of code {code...} contains O_RDWR|O_CREAT and S_IRUSR|S_IWUSR|S_IRG.....

仅有的幸福 2017-05-16 13:29:54 0  2  659

How to use mysqli to determine whether a MySQL database exists in PHP?

How to use the mysqli statement in PHP to accurately determine whether a MySQL database exists? In addition, how to determine whether a table in the database exists? In addition, what do the two styles provided in the official PHP documentation mean? Object-oriented style and process-oriented style....

淡淡烟草味 2017-06-14 10:49:52 0  1  1022

What is the meaning of mixed mapGetters syntax?

I saw in the documentation that mapGetters can use objects (for explicit local naming) or arrays (for implicit naming) when mapping stored values ​​to local component state. However, the code base I'm working with uses an unfamiliar syntax where strings are mixed with arrays. computed(){...mapGetter...

P粉492959599 2023-09-02 16:25:06 0  1  471