悲念泪

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悲念泪 2025-02-20 23:25:08

看起来像是一个非常标准的Unix时期时间戳。假设我们使用UTC(GMT)时区,日期是2017年6月6日,星期二7:29:33 AM。

UNIX时间是自1970年1月1日以来过去的秒数。时间戳意味着1496734173秒以来已经过去了,大约是47岁半,即2017年6月6日。

您可以转换dateTime < /code>以以下方式对将UNIX时间戳的对象:

DateTime dateTime = DateTime.Now; // this would be your DateTime
DateTimeOffset offset = new DateTimeOffset(dateTime);
long epoch = offset.ToUnixTimeSeconds(); // our epoch is a 64 bit integer, i.e. long

或者,一行:

long epoch = new DateTimeOffset(dateTime).ToUnixTimeSeconds();

That looks like a pretty standard UNIX epoch timestamp. Assuming we're using the UTC (GMT) timezone, the date is Tuesday, June 6, 2017 7:29:33 AM.

UNIX time is the amount of seconds that have passed since Jan 1, 1970. The timestamp means 1496734173 seconds have passed since then, which is about 47 and a half years, i.e. June 6, 2017.

You can convert a DateTime object to a UNIX timestamp in the following way:

DateTime dateTime = DateTime.Now; // this would be your DateTime
DateTimeOffset offset = new DateTimeOffset(dateTime);
long epoch = offset.ToUnixTimeSeconds(); // our epoch is a 64 bit integer, i.e. long

Or, in one line:

long epoch = new DateTimeOffset(dateTime).ToUnixTimeSeconds();

将数据转换为数值类型格式

悲念泪 2025-02-20 10:32:41

只是为了完整的目的:还有 Heredoc

$template = fn( $who, $what ) => <<<EOT
    $who likes $what
EOT;

echo( $template( 'tim', 'kung pao' ) );

输出:

tim likes kung pao

Sidenotes:

  • 您会以自己喜欢的语言突出显示(如果配置正确)。只需将EOT(从上面的示例)代替您喜欢的任何内容(EC HTML,SQL,PHP,...)。
  • 带有卷曲括号{$ data ['Who'']}的逃脱数组。访问$ data-&gt; Who无括号的objekts。
  • arrow functions 喜欢fn($ a)=&gt; $ a自PHP 7.4以来可用。您可以编写函数($ a){返回$ a;},如果您使用的是php&lt; 7.4。

Just for the sake of completeness: there is also Heredoc.

$template = fn( $who, $what ) => <<<EOT
    $who likes $what
EOT;

echo( $template( 'tim', 'kung pao' ) );

Outputs:

tim likes kung pao

Sidenotes:

  • You get highlighting in your favourite language (if properly configured). Just substitute EOT (from the sample above) with whatever you like (e.c. HTML, SQL, PHP, ...).
  • Escape arrays with curly braces {$data['who']}. Accessing objekts like $data->who works without braces.
  • Arrow functions like fn($a)=>$a are available since PHP 7.4. You can write function($a){return $a;} if you are using PHP<7.4.

PHP是否具有Python的模板字符串之类的功能?

悲念泪 2025-02-20 09:17:27

您不能编码直接的二进制字符串,它们需要采用十六进制格式,因此这不会起作用:

select '18374683274748987' :: binary;

The following string is not a legal hex-encoded value: '18374683274748987'

但这将:

select to_binary(hex_encode('18374683274748987'), 'HEX');

TO_BINARY(HEX_ENCODE('18374683274748987'), 'HEX')
3.138333734363833323734373438393837e+33

在您的情况下,请尝试:

Select tst2.id, tst1.id 
from test1 as tst1
inner join test2 as tst2
on tst1.id = tst2.id
where tst2.id = to_binary(hex_encode('18374683274748987'), 'HEX')
and tst2.date :: date >= '2022-06-20' :: date;

You cannot encode to binary directly strings, they need to be in a HEX format, so this won't work:

select '18374683274748987' :: binary;

The following string is not a legal hex-encoded value: '18374683274748987'

but this will:

select to_binary(hex_encode('18374683274748987'), 'HEX');

TO_BINARY(HEX_ENCODE('18374683274748987'), 'HEX')
3.138333734363833323734373438393837e+33

In your case try:

Select tst2.id, tst1.id 
from test1 as tst1
inner join test2 as tst2
on tst1.id = tst2.id
where tst2.id = to_binary(hex_encode('18374683274748987'), 'HEX')
and tst2.date :: date >= '2022-06-20' :: date;

无法将二进制(16)类型的参数转换为预期的varchar(40)雪花中的类型

悲念泪 2025-02-20 00:09:39

我会在容器中委派和导航

document.querySelector(".story").addEventListener("click", function(e) { // any click in the story div
  const tgt = e.target.closest("button"); // we click inside a button somewhere, closest makes sure it is the button itself we are getting
  tgt.closest(".story-contents") // the div holding button AND paragraph
    .querySelector(".story-contents-discription") // the paragraph
    .classList.toggle("active"); // toggle active on paragraph
  tgt.classList.toggle("active"); // toggle active on button
});
.story-title {
  color: #377dff;
}

.story-contents {
  margin-top: 1rem;
}

.story-contents-title {
  background-color: white;
  color: white;
  border: solid 2px #377dff;
  padding: 0.5rem;
  font-size: 4rem;
  border-radius: 10px;
  width: 20rem;
  color: #377dff;
}

.story-contents-title svg {
  stroke: #377dff;
  transition: all 0.5s ease-out;
}

.story-contents-title.active svg {
  transform: rotate(90deg);
}

.story-contents-discription {
  margin-top: 0.5rem;
  padding: 1rem;
  color: white;
  background-color: #377dff;
  border-radius: 10px;
  display: none;
}

.story-contents-discription.active {
  display: block;
}
<div class="story">
  <h1 class="story-title">Our Story</h1>
  <div class="story-contents">
    <button class="story-contents-title">2021<svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-arrow-big-right" width="34" height="34" viewBox="0 0 24 24" stroke-width="1.5" stroke="" fill="none" stroke-linecap="round" stroke-linejoin="round">
                <path stroke="none" d="M0 0h24v24H0z" fill="none"/>
                <path d="M4 9h8v-3.586a1 1 0 0 1 1.707 -.707l6.586 6.586a1 1 0 0 1 0 1.414l-6.586 6.586a1 1 0 0 1 -1.707 -.707v-3.586h-8a1 1 0 0 1 -1 -1v-4a1 1 0 0 1 1 -1z" />
              </svg></button>
    <p class="story-contents-discription">Wins ‘Outstanding Crisis Finance Innovation 2021 (Asia Pacific) Award’ by Global Finance Magazine <br> Launches Step Up Credit Card <br> Wins ‘Digital Lending Award’ at the Fintech India Innovation Awards <br> Wins “Excellence in Consumer Lending”
      at India Digital Awards</p>
  </div>
  <div class="story-contents">
    <button class="story-contents-title">2020<svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-arrow-big-right" width="34" height="34" viewBox="0 0 24 24" stroke-width="1.5" stroke="" fill="none" stroke-linecap="round" stroke-linejoin="round">
                <path stroke="none" d="M0 0h24v24H0z" fill="none"/>
                <path d="M4 9h8v-3.586a1 1 0 0 1 1.707 -.707l6.586 6.586a1 1 0 0 1 0 1.414l-6.586 6.586a1 1 0 0 1 -1.707 -.707v-3.586h-8a1 1 0 0 1 -1 -1v-4a1 1 0 0 1 1 -1z" />
              </svg></button>
    <p class="story-contents-discription">
      Upgrades in-house systems to enable work-from-home for employees <br> Launches Free Credit Report in Regional Languages

    </p>
  </div>
</div>

I would delegate and navigate within the container

document.querySelector(".story").addEventListener("click", function(e) { // any click in the story div
  const tgt = e.target.closest("button"); // we click inside a button somewhere, closest makes sure it is the button itself we are getting
  tgt.closest(".story-contents") // the div holding button AND paragraph
    .querySelector(".story-contents-discription") // the paragraph
    .classList.toggle("active"); // toggle active on paragraph
  tgt.classList.toggle("active"); // toggle active on button
});
.story-title {
  color: #377dff;
}

.story-contents {
  margin-top: 1rem;
}

.story-contents-title {
  background-color: white;
  color: white;
  border: solid 2px #377dff;
  padding: 0.5rem;
  font-size: 4rem;
  border-radius: 10px;
  width: 20rem;
  color: #377dff;
}

.story-contents-title svg {
  stroke: #377dff;
  transition: all 0.5s ease-out;
}

.story-contents-title.active svg {
  transform: rotate(90deg);
}

.story-contents-discription {
  margin-top: 0.5rem;
  padding: 1rem;
  color: white;
  background-color: #377dff;
  border-radius: 10px;
  display: none;
}

.story-contents-discription.active {
  display: block;
}
<div class="story">
  <h1 class="story-title">Our Story</h1>
  <div class="story-contents">
    <button class="story-contents-title">2021<svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-arrow-big-right" width="34" height="34" viewBox="0 0 24 24" stroke-width="1.5" stroke="" fill="none" stroke-linecap="round" stroke-linejoin="round">
                <path stroke="none" d="M0 0h24v24H0z" fill="none"/>
                <path d="M4 9h8v-3.586a1 1 0 0 1 1.707 -.707l6.586 6.586a1 1 0 0 1 0 1.414l-6.586 6.586a1 1 0 0 1 -1.707 -.707v-3.586h-8a1 1 0 0 1 -1 -1v-4a1 1 0 0 1 1 -1z" />
              </svg></button>
    <p class="story-contents-discription">Wins ‘Outstanding Crisis Finance Innovation 2021 (Asia Pacific) Award’ by Global Finance Magazine <br> Launches Step Up Credit Card <br> Wins ‘Digital Lending Award’ at the Fintech India Innovation Awards <br> Wins “Excellence in Consumer Lending”
      at India Digital Awards</p>
  </div>
  <div class="story-contents">
    <button class="story-contents-title">2020<svg xmlns="http://www.w3.org/2000/svg" class="icon icon-tabler icon-tabler-arrow-big-right" width="34" height="34" viewBox="0 0 24 24" stroke-width="1.5" stroke="" fill="none" stroke-linecap="round" stroke-linejoin="round">
                <path stroke="none" d="M0 0h24v24H0z" fill="none"/>
                <path d="M4 9h8v-3.586a1 1 0 0 1 1.707 -.707l6.586 6.586a1 1 0 0 1 0 1.414l-6.586 6.586a1 1 0 0 1 -1.707 -.707v-3.586h-8a1 1 0 0 1 -1 -1v-4a1 1 0 0 1 1 -1z" />
              </svg></button>
    <p class="story-contents-discription">
      Upgrades in-house systems to enable work-from-home for employees <br> Launches Free Credit Report in Regional Languages

    </p>
  </div>
</div>

如何使用同一类名称JavaScript选择多个元素

悲念泪 2025-02-19 19:42:33

您的代码:

on_release:threading.Thread(target=root.down).start()

将在新线程(不是主线程)上运行root.down()。该代码将尝试在该新线程上创建mddialogmdflatbutton。如果down()方法及其调用的方法只是像在您的帖子中一样创建对话框,那么您无需使用螺纹。只需将您的kv中的该行更改为:

on_release: root.down()

如果down()方法是一种长期运行的方法,它将冻结GUI直到完成。在这种情况下,请保留:

on_release:threading.Thread(target=root.down).start()

并安排任何修改GUI或创建GUI小部件以在主线程上运行的GUI小部件。一种简单的方法是,只需在必须在主线程上运行的任何方法上添加@mainthread装饰器即可。例如:

@mainthread
def empty(self):

    self.dialog = MDDialog(
        title="Error",
        text="You cannot download nothingness!",
        buttons=[
            MDFlatButton(text="CANCEL", on_release=self.diacloce)

            ]
        )
    self.dialog.open()

这将迫使要在主线程上运行的empty()方法(相当于使用clock.schedule_once())。对于只显示对话框的所有方法,都可以做同样的方法。

要记住的要点:

  1. GUI的更新是由Kivy主循环执行的,该循环在主线程上运行。
  2. 事件触发的任何方法(例如按钮按下)都在主线程上运行,而Kivy主循环必须等到该触发方法完成(因此请将它们简短)。
  3. 在不是主线程的线程中运行的方法可能不会修改GUI(甚至创建GUI小部件)。

因此,您应该通过使用小的短寿命修改方法将GUI修改与非GUI处理分开,除了GUI修改(例如您的对话框方法)外,该方法无需进行其他操作。这些GUI修改方法可以通过使用clock.schedule_once()或通过@mainthread ,然后直接调用这些方法。请记住,这些方法中的任何一种都只是在主线程上安排对GUI修改方法的调用。

Your code:

on_release:threading.Thread(target=root.down).start()

will run root.down() on a new thread (not the main thread). And that code will try to create a MDDialog and a MDFlatButton on that new thread, which is not allowed. If the down() method, and the methods it calls, are simply creating dialogs, as in your post, then you don't need to use threading. Just change that line in your kv to:

on_release: root.down()

If the down() method is a long running method, it will freeze the GUI until it completes. In that case, keep the:

on_release:threading.Thread(target=root.down).start()

and arrange for anything that modifies the GUI or creates GUI widgets to be run on the main thread. A simple way to do that is to just add the @mainthread decorator on any method that must be run on the main thread. For example:

@mainthread
def empty(self):

    self.dialog = MDDialog(
        title="Error",
        text="You cannot download nothingness!",
        buttons=[
            MDFlatButton(text="CANCEL", on_release=self.diacloce)

            ]
        )
    self.dialog.open()

This will force the empty() method to be run on the main thread (equivalent to running it using Clock.schedule_once()). The same can be done for all of your methods that just display a dialog.

The key points to keep in mind:

  1. Updates to the GUI are performed by the Kivy main loop, which runs on the main thread.
  2. Any method that is triggered by an event (like a Button press) runs on the main thread, and the Kivy main loop must wait until that triggered method completes (so keep them short).
  3. Methods running in a thread that is not the main thread may not modify the GUI (or even create GUI widgets).

So, you should separate GUI modification from non-GUI processing by using small short lived methods for GUI modification that do nothing other than GUI modification (like your dialog methods). These GUI modifying methods can be called from the non-GUI methods (that are running on other threads) by using Clock.schedule_once() or by decorating the GUI modifying methods with @mainthread and then calling those methods directly. Keep in mind that either of these approaches just schedules the call to the GUI modification method on the main thread.

我有kivy的螺纹问题

悲念泪 2025-02-19 13:36:54

交替更改捕获组号。您可以在交替中的增量数字说明:

subPatterns[@"(\d)(\d)\2\1$"] = "abba";
subPatterns[@"(\d)\3(\d)\4$"] = "aabb";

模式看起来像这样,与$匹配在字符串末端的4位数字,

(\d)(\d)\2\1$|(\d)\3(\d)\4$

或者您可以使用相同的命名backReferences

subPatterns[@"(?<1>\d)\k<1>(?<2>\d)\k<2>"] = "abba";
subPatterns[@"(?<1>\d)(?<2>\d)\k<2>\k<1>"] = "aabb";

然后,该模式看起来像

(?<1>\d)(?<2>\d)\k<2>\k<1>|(?<1>\d)\k<1>(?<2>\d)\k<2>

note ,如果匹配项适用于整个行,则可以附加锚^对它和整个模式看起来

^(?:(?<1>\d)(?<2>\d)\k<2>\k<1>|(?<1>\d)\k<1>(?<2>\d)\k<2>)$

Regex Demo 和a c#demo

The alternation changes the capture group numbers. You can either account for the incremented numbers in the alternation:

subPatterns[@"(\d)(\d)\2\1
quot;] = "abba";
subPatterns[@"(\d)\3(\d)\4
quot;] = "aabb";

The pattern will look like this, matching the 4 digits at the end of the string due to the $

(\d)(\d)\2\1$|(\d)\3(\d)\4$

Or you can use the same named backreferences:

subPatterns[@"(?<1>\d)\k<1>(?<2>\d)\k<2>"] = "abba";
subPatterns[@"(?<1>\d)(?<2>\d)\k<2>\k<1>"] = "aabb";

The pattern will then look like

(?<1>\d)(?<2>\d)\k<2>\k<1>|(?<1>\d)\k<1>(?<2>\d)\k<2>

Note that if the matches are for the whole line, you can append an anchor ^ to it and the whole pattern will look like

^(?:(?<1>\d)(?<2>\d)\k<2>\k<1>|(?<1>\d)\k<1>(?<2>\d)\k<2>)$

See a regex demo and a C# demo.

REGEX .NET或操作员不在替代组上工作

悲念泪 2025-02-19 02:24:21

这个示例我发现不言自明。请注意等待结果如何等待结果,因此您错过了退回的承诺。

cryA = crypto.subtle.generateKey({name:'ECDH', namedCurve:'P-384'}, true, ["deriveKey", "deriveBits"])
Promise {<pending>}
cryB = await crypto.subtle.generateKey({name:'ECDH', namedCurve:'P-384'}, true, ["deriveKey", "deriveBits"])
{publicKey: CryptoKey, privateKey: CryptoKey}

This example I find self-explanatory. Notice how await waits for the result and so you miss the Promise being returned.

cryA = crypto.subtle.generateKey({name:'ECDH', namedCurve:'P-384'}, true, ["deriveKey", "deriveBits"])
Promise {<pending>}
cryB = await crypto.subtle.generateKey({name:'ECDH', namedCurve:'P-384'}, true, ["deriveKey", "deriveBits"])
{publicKey: CryptoKey, privateKey: CryptoKey}

如何获得承诺的价值?

悲念泪 2025-02-18 10:27:57

基于您提供的代码段,datacenter是未定义的,尚未初始化。结果,测试条件无法满足,因此withlocaldatacenter()未被调用。

无论如何,如错误消息所述,您需要明确地告诉驱动程序本地直流的名称,因此检查datacenter是否为null还是空是不良练习。

相反,您应始终指定应用程序本地数据中心。例如:

datastax-java-driver {
  basic.load-balancing-policy {
    local-datacenter = DC1
  }
}

当然,当您通过编程构建会话配置时,始终 withlocaldatacenter() ,例如:

CqlSession session = CqlSession.builder()
    .withLocalDatacenter("DC1")
    .build();

有关详细信息,请参见 java驱动程序中的负载平衡

Based on the code snippet you provided, dataCenter is undefined and hasn't been initialised. As a result the test condition doesn't get satisfied so withLocalDatacenter() doesn't get called.

In any case as the error message states, you need to explicitly tell the driver the name of the local DC so checking whether dataCenter is null or empty is bad practice.

Instead, you should always specify the data centre local to your app. For example:

datastax-java-driver {
  basic.load-balancing-policy {
    local-datacenter = DC1
  }
}

Of course when you're programatically building the session configuration, always make a call to withLocalDatacenter(), for example:

CqlSession session = CqlSession.builder()
    .withLocalDatacenter("DC1")
    .build();

For details, see Load balancing in the Java driver.

与Java驱动程序连接到Cassandra,必须明确设置“本地DC”。

悲念泪 2025-02-18 09:32:52

一旦我知道答案,它确实很简单,只需添加一个逗号即可表示类型参数的数量:

serviceCollection
    .AddSingleton(typeof(IDataSource<>), typeof(DataSource<>))
    .AddSingleton(typeof(IDataTarget<>), typeof(DataTarget<>))
    .AddSingleton(typeof(IDataPump<,>), typeof(DataPump<,>))

Once I know the answer it's really simple, just had to add a comma to signify the number of type arguments:

serviceCollection
    .AddSingleton(typeof(IDataSource<>), typeof(DataSource<>))
    .AddSingleton(typeof(IDataTarget<>), typeof(DataTarget<>))
    .AddSingleton(typeof(IDataPump<,>), typeof(DataPump<,>))

如何在Dotnet核心中以多种类型的参数注册依赖项注入的多种类型?

悲念泪 2025-02-18 08:29:12

如下两次单引号

WHEN [Group] = 'Representation Accepted' AND [Reason] = 'Reduced to Warning Notice'' Area Authorised' THEN 31

use two times single quotation as below

WHEN [Group] = 'Representation Accepted' AND [Reason] = 'Reduced to Warning Notice'' Area Authorised' THEN 31

SQL在案例语句中不接受我的字符串作为条件

悲念泪 2025-02-18 04:31:15

始终具有“胶水”功能(这次用A修饰符表示\ g逃脱顺序),但具有不同的模式结构,可以避免交替:

echo preg_replace('~(?:^.*?/pattern,)?(?!^)[^/-]*+\K-~A', '~', $str);

REGEX DEMO
php demo

通知:而不是所有格量化器此处[^/ - ]*+ ,您还可以使用(*commit)回溯控制动词,在字符串中没有破折号时快速中止研究很有趣:

~(?:^.*?/pattern,)?(?!^)[^/-]*\K(*COMMIT)-~A

Always with the "glue" feature (this time expressed with the A modifier instead of the \G escape sequence), but with a different pattern structure that avoids the alternation:

echo preg_replace('~(?:^.*?/pattern,)?(?!^)[^/-]*+\K-~A', '~', $str);

regex demo
php demo

Notice: instead of the possessive quantifier here [^/-]*+, you can also use the (*COMMIT) backtracking control verb that is interesting to quickly abort the research when there's no dash in the string:

~(?:^.*?/pattern,)?(?!^)[^/-]*\K(*COMMIT)-~A

如何从字符串中的两个模式之间的子字符串中替换子字符串?

悲念泪 2025-02-17 13:50:14

您缺少cartprovider

{...}

    beforeEach(() => {
        render(
          <CartProvider>
            <Router>
                <AddToCart product={product} styles={styles}/>
            </Router>
          </CartProvider>
        );
    });

You are missing CartProvider:

{...}

    beforeEach(() => {
        render(
          <CartProvider>
            <Router>
                <AddToCart product={product} styles={styles}/>
            </Router>
          </CartProvider>
        );
    });

TypeError:GetItem在测试具有节点模块钩的组件时不是功能

悲念泪 2025-02-17 07:38:06

我会这样写:

from itertools import cycle

def my_func(st):
    operation = cycle((str.upper, str.lower))
    conv = [next(operation)(c) if c != ' ' else c for c in st]
    return ''.join(conv)

演示:

>>> my_func("Hello my guy")
'HeLlO mY gUy'

I'd write it like this:

from itertools import cycle

def my_func(st):
    operation = cycle((str.upper, str.lower))
    conv = [next(operation)(c) if c != ' ' else c for c in st]
    return ''.join(conv)

Demo:

>>> my_func("Hello my guy")
'HeLlO mY gUy'

如何使枚举不计算空白的索引?

悲念泪 2025-02-17 01:53:21

就像Stefan所展示的那样,我会这样做。
在VFP中,您还有机会使用非SQL语句,从而更容易表达自己。从您的代码中,感觉就像Keymemo是一个独特的领域:

* Get the Memo value into an array
* where KeyMemo = '10045223'
* or use that as a variable also
local lcKey
lcKey = '10045223'
Select Memo From expertcorr_memoinv ;
     WHERE Keymemo=m.lcKey ;
     into array laMemo

* Update with that value
Update expertcorr_memoinv ;
    Set Memo = laMemo[1] ;
    WHERE Keydoc Like "UBOA"

这仅适用于Divide&amp;征服策略可能会更容易遵循。除此之外,用单个SQL编写它还可以。

PS:在VFP中,您根本不使用反击。
单引号,双引号和打开的闭合方括号不被用作标识符,但所有这三个都用于字符串文字。

'This is a string literal'
"This is a string literal"
[This is a string literal] 

"My name is John O'hara"
'We need 3.5" disk'
[Put 3.5" disk into John's computer]

它们之间存在细微的差异,我认为这是一个高级话题,您可能不需要知道。

[]也用于数组索引器。
其中任何一个也可以用于表名称,别名名称,文件名...(名称表达式)之类的东西 - 仍然是字符串文字,括号使其成为名称表达式。 IE:

select * from ('MyTable') ...

copy to ("c:\my folder\my file.txt") type delimited

I would do that just as Stefan showed.
In VFP, you also have a chance to use non-SQL statements which make it easier to express yourself. From your code it feels like KeyMemo is a unique field:

* Get the Memo value into an array
* where KeyMemo = '10045223'
* or use that as a variable also
local lcKey
lcKey = '10045223'
Select Memo From expertcorr_memoinv ;
     WHERE Keymemo=m.lcKey ;
     into array laMemo

* Update with that value
Update expertcorr_memoinv ;
    Set Memo = laMemo[1] ;
    WHERE Keydoc Like "UBOA"

This is only for divide & conquer strategy that one may find easier to follow. Other than that writing it with a single SQL is just fine.

PS: In VFP you don't use backticks at all.
Single quotes, double quotes and opening closing square brackets are not used as identifiers but all those three are used for string literals.

'This is a string literal'
"This is a string literal"
[This is a string literal] 

"My name is John O'hara"
'We need 3.5" disk'
[Put 3.5" disk into John's computer]

There are subtle differences between them, which I think is an advanced topic and that you may never need to know.

Also [] is used for array indexer.
Any one of them could also be used for things like table name, alias name, file name ... (name expression) - still they are string literals, parentheses make it a name expression. ie:

select * from ('MyTable') ...

copy to ("c:\my folder\my file.txt") type delimited

我如何使用更新&#x27;在Foxpro中选择?

悲念泪 2025-02-15 22:47:53

通过将数据文件分配到单独的文件中并制作负载函数以加载变量,然后再对其进行更改,从而解决了问题。

Resolved the issue by splitting data file into separate files and making a load function to load the variable and then change it before saving again.

更改另一个文件中的循环变量值

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