## Set theory – partition of n elements in k subsets

Given a set of n identical elements. Determine the number of possible types on which k subsets can be formed
Say A = {0,0,0,0,0,0,0,0} and k = 3 like {{0,0}, {0,0,0}, {0,0}}
The answer is 36, but I can not understand the math behind it. Can someone please explain?

## Find the invertible elements in \$ mathbb {Z} ( exp (2 pi i / 3)) \$

To let $$R = mathbb {Z} (e ^ {2 pi i over 3})$$, Find $$R ^ times$$,

Attempt:

To let $$zeta = e ^ {2 pi i over3}$$,

1. If $$x ^ {- 1} = d + e zeta + f zeta ^ 2$$ for some $$R times nix: = a + b zeta + c zeta ^ 2$$ then we have to have
$$1 = ad + bf + ce \ 0 = ae + bd + cf \ 0 = af + be + cd$$
But I want to find a more elegant way to solve the problem.
2. Another approach is to notice that in the plane, $$R$$ looks like the dots of many hexes that are close together, but I'm not sure how it helps.

## c ++ – How do I write a generic function for inserting elements into the map container?

I insert elements into the map container. For this I use the same instructions several times in the following function. Can I write a generic function for this? So that I can insert new elements later as needed.

`````` bool EMRMgr::GetParams()
{
EmIOStruct emIOstructObj;
WCHAR szValue(MAX_PATH) = { 0 };
DWORD dwDataSize = sizeof(szValue) / sizeof(WCHAR);
long lRes = 0;
McStorageType mcStorageTypeObj = McStorageType::eRegistry;
std::wstring value;

// First time I am using the below statements to insert elements into the map container

mcIOstructObj.lpszValueName = (LPWSTR)ER_ID;
memset(szValue, 0, MAX_PATH);
mcIOstructObj.lpData = (LPBYTE)&szValue(0);
lRes = m_cIOManager.ReadValue(mcStorageTypeObj, mcIOstructObj);
value.clear();
if ((LPWSTR)mcIOstructObj.lpData == nullptr)
{
value.assign(L"");
}
else
{
value.assign((LPWSTR)mcIOstructObj.lpData);
}

m_fileParams.insert({ (std::wstring) ER_ID, value });

// Second time I am using the below statements to insert elements into the map container

mcIOstructObj.lpszValueName = (LPWSTR)CPS;
memset(szValue, 0, MAX_PATH);
mcIOstructObj.lpData = (LPBYTE)&szValue(0);
lRes = m_cIOManager.ReadValue(mcStorageTypeObj, mcIOstructObj);
value.clear();
if ((LPWSTR)mcIOstructObj.lpData == nullptr)
{
value.assign(L"");
}
else
{
value.assign((LPWSTR)mcIOstructObj.lpData);
}
m_fileParams.insert({ (std::wstring) CPS, value });

return true;
}
``````

## sharepoint online – How to display a list element and its associated elements in the simplest way

In SharePoint 2013 and earlier, you could have used a URL parameter to filter the project list web part by the ID of the client. Currently, however, Modern SharePoint does not have the required Web Parts or features.

However, you can use an embedded PowerApp. Use the client as a data source, use a drop-down menu to select the client, then use the projects as a different data source, filter on the selected client ID, and view the results in a gallery.

## Assign the body elements as environment variables in Postman

I have a scenario where I have to pass the body element values ​​to the environmen variable and have to resort to them in another API.

Below is the body,

``````{
"firstName" : "James",
"lastName" : "Joseph",
"email" : "{{timestamp}}@test.com",
"country" : 16
}
``````

Below is the pre-req script,

``````postman.setEnvironmentVariable("timestamp", (new
Date).getTime());
// I have copied the Body and paste it in a variable called Obj in Pre-
req
// Then i used the below script to get the body
pm.environment.set("rawBody", JSON.stringify(obj));
``````

The environment values ​​for timestamp, email address, and password are listed below. The timestamp value is correct and the other two are wrong.

``````timestamp = 1566076106769
email = {{timestamp}}@test.com
``````

The timestamp value is not replaced in e-mail and password. I want the value of the environment variable to be set as follows:

``````email = 1566076106769@test.com
``````

How can I assign the value of the body of an environment / global variable to use in another API call?

## From all trade elements

It was kindly said that we, the newcomers, did not reach the peak of our success. Successful start immediately starts the wheel. In order to succeed in Forex, we must strive to practice well and give our demo account our best shot.

## sharepoint online – hide elements in a form

Lately, I see this feature in Sharepoint broken, I'm not putting it. Please help me
First go to List Settings> Advanced Settings
Under Allow content type management, select Yes
Click one of the existing content types in the Content Type section. Then click the column you want to hide and select the Hidden option.

## From all trading elements – Forex Training

Of all trading elements, spreads and leverage are two important financial instruments that an investor should consider when choosing a broker. Without the least trading margins and flexible trading options, it is not possible to have a comfortable trading life despite the extensive analysis of trading knowledge.

## Javascript – Create arrays based on elements of even and odd indexes of another array

I want to fill two arrays (`sentences` and `links` ) With odd and even indices from `sentence` Birthday:

I tried the following without success:

``````     let link_sentence = ">60-1> don't you worry >6-2> I gonna make sure that >16-32> tomorrow is another great day"; //

let sentence =  link_sentence.split(">")
let sentences= ()
let links = ()
for(let i = 0; i < sentence.length; i += 2) {

sentences.push(sentence(i));
}
console.log(sentences)``````

The expected output should be:

``````//let links = ("60-1", "6-2", "16-32");
//let sentences = ("don't you worry", "I gonna make sure that", "tommorow is  another great day");
``````

## Streaming – How to recognize the URLs of various elements in a mobile app?

A mobile app can contain pictures and videos. Let me use a streaming app as an example (eg Tik Tok, Likee, etc.)

Let us make this question easier -> without registrationYou can still see some videos, live shows that are open to the public when you open the app.

Question:

1. How to recognize the URLs of such videos?

2. Does the Q1 method apply to URLs on a specific page with apps, links / buttons, file downloads, and so on?