satoshi-2000/llms-suitable huggingface dataset:
Question: What is the algorithm applied to create a circular array in javascript?

I have a code like below.
var t = [1, 2];
t[2] = t;


This creates a circular array. What is the algorithm applied to create this circular array in javascript.


Answer:
There's no algorithm involved. It's just that your array refers to itself. When a variable or property refers to an object (arrays are objects), what's held in the variable is an object reference, which is a value that tells the JavaScript engine where that object is elsewhere in memory. You can think of it as a number that uniquely identifies a memory location where the object is. (That isn't what it is, but it's a handy way to think of it.)
Let's look at the code. You start with:
var t = [1, 2];

That creates an array and stores an object reference for it in t. That creates something somewhat like this in memory (various details omitted for clarity):

                  +−−−−−−−−−−−−−−−+
t:{Ref18465}−−−−−>|    (array)    |
                  +−−−−−−−−−−−−−−−+
                  | length: 2     |
                  | 0: 1          |
                  | 1: 2          |
                  +−−−−−−−−−−−−−−−+

The Ref18465 I've shown is a stand-in for the object reference, which we never directly see in code. We have an array, and a variable containing an object reference saying where the array is.
Then your code does this:
t[2] = t;

That adds a new element to the array containing the object reference of the array, making it refer to itself:

              +−−−−−−−−−−−−−−−−−−−−−−+
              |                      |
              \   +−−−−−−−−−−−−−−−+  |
t:{Ref18465}−−−+−>|    (array)    |  |
                  +−−−−−−−−−−−−−−−+  |
                  | length: 3     |  |
                  | 0: 1          |  |
                  | 1: 2          |  |
                  | 2: {Ref18465} |>−/
                  +−−−−−−−−−−−−−−−+

Now, both t and t[2] contain the object reference to the array. As you say, the array refers to itself. There's no particular algorithm involved, it's just a circular data structure.
Question: Spring Rest Controller not able to validate path variable when request body is also passed in addition to path variable

I've a rest controller and one of the endpoint looks like this:
@PostMapping(value = "/myapi/{id}", produces = APPLICATION_JSON_VALUE, consumes = APPLICATION_JSON_VALUE)
public ResponseEntity<MyEntity> myApi(
          @Valid @PathVariable("id") @NotBlank String id,
          @Valid @RequestBody MyRequestPayload myRequestPayload) throws Exception)
{
  LOGGER.info("Id is {}",id);
  ...............
  .........................
  .............................
}

For some reason, when I call the API with an empty or null path variable and a request payload, the path variable is not failing the validation and the control comes inside the method block.
What am I doing wrong? Kindly advise.


Answer:
@Valid validates complex objects, containing fields annotated with constraint annotations.
For this case, you need to use @Validated:

The @Validated annotation is a class-level annotation that we can use to tell Spring to validate parameters that are passed into a method of the annotated class.

So mark your controller class as @Validated, which would trigger the validation of the id path variable.
@RestController
@RequestMapping("/my")
@Validated
public class MyController {

  @PostMapping(value = "/myapi/{id}", produces = APPLICATION_JSON_VALUE, consumes = APPLICATION_JSON_VALUE)
  public ResponseEntity<MyEntity> myApi(
      @PathVariable("id") @NotBlank String id,
      @Valid @RequestBody MyRequestPayload myRequestPayload) throws
      Exception {
    LOGGER.info("Id is {}", id);
  }
}

Reference: Validation with Spring Boot
Question: Regex to catch email addresses in email header

I'm trying to parse a To email header with a regex. If there are no <> characters then I want the whole string otherwise I want what is inside the <> pair.
import re
re_destinatario = re.compile(r'^.*?<?(?P<to>.*)>?')
addresses = [
    'XKYDF/ABC (Caixa Corporativa)',
    'Fulano de Tal | Atlantica Beans <fulano.tal@atlanticabeans.com>'
]
for address in addresses:
    m = re_destinatario.search(address)
    print(m.groups())
    print(m.group('to'))

But the regex is wrong:
('XKYDF/ABC (Caixa Corporativa)',)
XKYDF/ABC (Caixa Corporativa)
('Fulano de Tal | Atlantica Beans <fulano.tal@atlanticabeans.com>',)
Fulano de Tal | Atlantica Beans <fulano.tal@atlanticabeans.com>

What am I missing?


Answer:
You may use this regex:
<?(?P<to>[^<>]+)>?$

RegEx Demo
RegEx Demo:

<?: Match an optional <
(?P<to>[^<>]+): Named capture group to to match 1+ of any characters that are not < and >
>?: Match an optional >
$: End

Code Demo
Code:
import re
re_destinatario = re.compile(r'<?(?P<to>[^<>]+)>?$')
addresses = [
    'XKYDF/ABC (Caixa Corporativa)',
    'Fulano de Tal | Atlantica Beans <fulano.tal@atlanticabeans.com>'
]
for address in addresses:
    m = re_destinatario.search(address)
    print(m.group('to'))

Output:
XKYDF/ABC (Caixa Corporativa)
fulano.tal@atlanticabeans.com
Question: MySql count with GROUP BY returns 1 even when count is 0

I have two tables in MySql i.e., subjects and photos and I wished to count the number of photos on each subjects
SELECT a.id, a.name, count(a.id) as `refcount`, 
FROM `subjects` a 
LEFT JOIN `photos` b ON (a.id = b.subject_id)
GROUP by a.id
ORDER BY a.name";

returns 1 even when the rowcount()=0.  How to fix it
I tried various MySql syntax including count(field), but in vain


Answer:
You will need to count photos.id (b.id), if no photos are found for the given subject, the query will return null, count(null) = 0.
SELECT a.id, a.name, count(b.id) as `refcount`
FROM `subjects` a 
LEFT JOIN `photos` b ON a.id = b.subject_id
GROUP by a.id, a.name
ORDER BY a.name;
Question: Building a Type from an object with properties of type Boolean?

I would like to construct a type from this object:
const isSynchronized: Record<SynchronizableField, boolean> = {
    /* synchronized */
    surveyMacroEnvironments: true,
    coordinateReferenceSystemCrs: true,
    transactionType: true,
    epsgTransformation: true,
    startingAgreementDate: true,
    expirationAgreementDate: true,
    transactionTypeNotes: true,
    surveyDataType: true,
    /* not synchronized */
    surveyName: false,
    validationStateCd: false,
    legacy: false,
    notifyOnCreate: false,
    notifyOnValidate: false,
    finalReportLink: false,
    // timestamp fields
    creationDate: false,
    lastUpdate: false,
    // continent and country are handled differently
    continent: false,
    country: false,
};

where the type needs to have only the keys with values equal to true, could you please help me or give me any suggestions?
Thanks


Answer:
As a first step we have to remove that type annotation on isSynchronized; we need the compiler to infer its type and then use that inferred type to compute the key set you're looking for.  You could use the satisfies operator instead to make sure the property types are checked against and constrained to boolean:
const isSynchronized = {
    surveyMacroEnvironments: true,
    coordinateReferenceSystemCrs: true,
    transactionType: true,
    epsgTransformation: true,
    startingAgreementDate: true,
    // ✂ ⋯ ✂
    lastUpdate: false,
    continent: false,
    country: false,
} satisfies Record<string, boolean>;

type IsSynchronized = typeof isSynchronized;

Now you can inspect IsSynchronized to get the desired type.

You're looking for an application of a type function I call KeysMatching<T, V>, as requested in microsoft/TypeScript#48992 and as discussed in
In TypeScript, how to get the keys of an object type whose values are of a given type?.  The idea is that KeysMatching<T, V> would evaluate to the union of property keys of T where the property values at those keys are assignable to V.  Specifically it looks like you want KeysMatching<IsSynchronized, true>.
There's no native KeysMatching provided by the language, but there are a number of ways to implement it yourself, with various issues and edge cases.  One approach is a distributive object type where we map over all the properties of T and then index into the result with all the keys to end up with the union of the computed property types.  Like this:
type KeysMatching<T, V> =
    { [K in keyof T]: T[K] extends V ? K : never }[keyof T]

And let's use it:
type SynchronizedKeys = KeysMatching<IsSynchronized, true>;
// type SynchronizedKeys = "surveyMacroEnvironments" | "coordinateReferenceSystemCrs" |
//   "transactionType" | "epsgTransformation" | "startingAgreementDate" | 
//   "expirationAgreementDate" | "transactionTypeNotes" | "surveyDataType"

Looks good. If you don't want to keep KeysMatching around, you can inline the definition to compute SynchronizedKeys directly:
type SynchronizedKeys = {
    [K in keyof IsSynchronized]: IsSynchronized[K] extends true ? K : never
}[keyof IsSynchronized];

Playground link to code
Question: Need help in string replacement in PHP

I have a string like this:
$str = '[{"action": "verify_with_source","created_at": "2023-05-30T01:39:54+05:30","status": "in_progress","type": "license"}] {"address":null,"badge_details":null,"card_serial_no":null,"city":null,"cov_details":[{"category":"NT","cov":"MCWG","issue_date":"2021-03-30"},{"category":"NT","cov":"LMV","issue_date":"2021-03-30"}],"date_of_issue":"2021-03-30","date_of_last_transaction":"2021-03-30","dl_status":"Active","dob":"1996-10-09","face_image":null,"gender":null,"hazardous_valid_till":null,"hill_valid_till":null,"id_number":"DL1234567890","issuing_rto_name":"MY CITY","last_transacted_at":"MY CITY","name":"MY NAME","nt_validity_from":"2021-03-30","nt_validity_to":"2036-10-08","relatives_name":null,"source":"SOURCE","status":"id_found","t_validity_from":null,"t_validity_to":null}'

What I want to split the string in 2 parts - [{"action": "verify_with_source",..."type": "license"}] and {"category":"NT","cov":"LMV","issue_date":"2021-03-30"}],...,"t_validity_to":null"}.
I removed [ and ] with -
$raw = str_replace(['[', ']'], '', $raw);

Then, I have tried-
$str = preg_replace('^/} {/', '}{', $raw);

and
$str = preg_replace('^/}\s{/', '}{', $raw);

and
$str = str_replace('} {', '{}', $raw);

Then I intend to split string $str into array of 2 strings with statement -
$arr = explode('}{', $str);

The string is not being splitted and above statement returns whole string in first element of array.
What is wrong with my script?


Answer:
I would suggest to make it a bit easier instead of replacing all the braces.
explode can handle that for you and split the string at a place you want. So just split it at the position ] { where the license ends and the objects starts and add the missing braces afterwards to that strings.
<?php

$str = "<your long string>"

$jsonStrings = explode('] {', $str, 1);

$jsonStrings[0] .= ']';
$jsonStrings[1] = '{' . $jsonStrings[1];


be aware of there is no error handling. if there is no ] { chars in your string, explode will not create an array with two strings and the rest of the code is failing.
Question: MongoDB insertMany skip the same _id field to avoid 'code: 11000,'

await testCollection.insertMany(testArray, { ordered: false });

I have this code. I found that putting { ordered: false } will prevent getting E11000 error code. But, it looks like, it does not. Is there any way that I can avoid this error? I want to skip and do not insert a doc that has the same _id code.


Answer:
You can't avoid error, but you can proceed with inserting. See here. For example:
    MongoDB Enterprise replset:PRIMARY> db.products.insert(
    ...    [
    ...      { _id: 20, item: "lamp", qty: 50, type: "desk" },
    ...      { _id: 21, item: "lamp", qty: 20, type: "floor" },
    ...      { _id: 21, item: "lamp", qty: 20, type: "floor" },
    ...      { _id: 22, item: "bulk", qty: 100 }
    ...    ],
    ...    { ordered: false }
    ... )
    BulkWriteResult({
            "writeErrors" : [
                    {
                            "index" : 2,
                            "code" : 11000,
                            "errmsg" : "E11000 duplicate key error collection: newdb1.products index: _id_ dup key: { _id: 21.0 }",
                            "op" : {
                                    "_id" : 21,
                                    "item" : "lamp",
                                    "qty" : 20,
                                    "type" : "floor"
                            }
                    }
            ],
            "writeConcernErrors" : [ ],
            "nInserted" : 3,
            "nUpserted" : 0,
            "nMatched" : 0,
            "nModified" : 0,
            "nRemoved" : 0,
            "upserted" : [ ]
    })
    MongoDB Enterprise replset:PRIMARY> db.products.find()
    { "_id" : 20, "item" : "lamp", "qty" : 50, "type" : "desk" }
    { "_id" : 21, "item" : "lamp", "qty" : 20, "type" : "floor" }
    { "_id" : 22, "item" : "bulk", "qty" : 100 }

you may see, that if you remove { ordered: false }, the only inserted records will be records before first error accured:
MongoDB Enterprise replset:PRIMARY> db.products.find()
{ "_id" : 20, "item" : "lamp", "qty" : 50, "type" : "desk" }
{ "_id" : 21, "item" : "lamp", "qty" : 20, "type" : "floor" }
Question: how to generate relationship between two enumerate with double cycle

Thanks a lot in advance .  trouble in how to generate relationship between two enumerate .
%-------------------------------
enum weeks = {w1,w2,w3,w4};
array[weeks] of 1..10 : weekShiftQty = [4,5,7,4]; % total shift = 20
enum shift = _(1..20);
array[shift] of weeks : shiftWeek
= [
% how to generate shiftWeek relationship %
  % just like following : calculate shift belog to which week base on weekShiftQty
  % shiftWeek[1] = w1 , ... , shiftWeek[4] = w1 , 
  % shiftWeek[5] = w2 ,...  , shiftWeek[9] = w2 ,
  % shiftWeek[10] = w3 ,...  , shiftWeek[16] = w3 ,
  % shiftWeek[17] = w4 ,...  , shiftWeek[20] = w4 ,
  | s in shift
];

%-------------------------------


Answer:
Here's a solution, i.e. using [ w | w in weeks, _ in 1..weekShiftQty[w]] to generate the shiftWeek array:
enum weeks = {w1,w2,w3,w4};
array[weeks] of 1..10 : weekShiftQty = [4,5,7,4]; % total shift = 20
enum shift = _(1..20);

array[shift] of weeks: shiftWeek = [
                                     w
                                     | w in weeks,
                                       _ in 1..weekShiftQty[w]
                                     ];
output [
        "shiftWeek: \(shiftWeek)\n"
        ];


The output is
shiftWeek: [w1, w1, w1, w1, w2, w2, w2, w2, w2, w3, w3, w3, w3, w3, w3, w3, w4, w4, w4, w4]
Question: Check in range of multiple float variables

User input scores of subjects and I need to check if these scores are valid (0->10, step is 0.1 because for exp: 5.25 or 5.1 is acceptable). Below is my code:
def Task_22():
    mathematics = float(input("Input mathematics score: "))
    literature  = float(input("Input literature score: "))
    english     = float(input("Input english score: "))
    # check valid score
    if all(i in range(0,11) for i in [mathematics, literature, english]):
        print("OK")
    else: print("NOK")

but when input as below, the result is not as my expected:
Input mathematics score: 2
Input literature score: 5
Input english score: 7.25
NOK



Answer:
The range() function lets you create an iterator so you can loop over some integers. When you use i in range(0, 11), you're essentially asking "will range(0, 11) eventually iterate over i", not "is i within the upper and lower bounds of range(0, 11)". Because range() only works with integers, a float will be iterator over by range, and thus a float will never be in a range.
What you really want to do is check if the number is greater or equal to a lower bound and less than or equal to an upper bound, using operators like >= and <=.
def Task_22():
    mathematics = float(input("Input mathematics score: "))
    literature  = float(input("Input literature score: "))
    english     = float(input("Input english score: "))
    # check valid score
    if all(0 <= i <= 10 for i in [mathematics, literature, english]):
        print("OK")
    else: print("NOK")
Question: I'm trying to do a search by title and by content, but it gives an error syntax error at or near \"OR\

I'm trying to do a search by title and by content, but it gives an error
Typeorm
select
p.*,
from post p
left join vote v on p.id = v.post_id and v.user_id = $1
where p.is_published = true AND p.title ilike OR p.context::text ilike $2
limit 5 offset $3

const posts = await AppDataSource.query(`
  select
  p.*,
  from post p
  left join vote v on p.id = v.post_id and v.user_id = $1
  where p.is_published = true AND p.title ilike OR p.context::text ilike $2
  limit 5 offset $3
 `, [req.user.id, `%${req.query.q}%`, req.query.skip]
)



Answer:
There's a matching pattern missing:
p.title ilike OR p.context::text ilike $2
             ^ HERE
Question: resampling/"upscaling" using scipy.interpolate.RectBivariateSpline no diffrence

I am testing out scipy.interpolate.RectBivariateSpline for a project where I want to upscale some data to achieve better resolution. My attempt at using both scipy.interpolate.RectBivariateSpline and scipy.interpolate.interp2d results in no interpolation actually happening to the data; I just end up with a bigger matrix filled with more zeros. I have looked at some examples as well, but I am unable to see what I have done differently from them. And i would also expect my orgianal data to be centerd. Any help is appreciated
code
n = 10
smile = np.zeros((n,n))
a = 0.5
smile[2,2] = a
smile[3,2] = a
smile[2,7] = a
smile[3,7] = a
smile[6,2] = a
smile[6,7] = a
smile[7,3:7] = a


plt.imshow(smile)
plt.show()

#RECTBIVARIATESPLINE
#making interpolation function
x = np.arange(n)
y = x 
z = smile

interpolation_funk = scipy.interpolate.RectBivariateSpline(x,y,z)

#using interpolation
x_new = np.arange(2*n)
y_new = x_new
Z_new = interpolation_funk(x_new,y_new)


#plotting new funtion
plt.imshow(Z_new)




Answer:
Note x_new = np.arange(2*n) : you are evaluating the interpolant outside of the original data range ([0, 9] x [0, 9]) and you get all zeros for the extrapolation.
Use x_new = np.arange(2*n) / 2 or some such to actually interpolate between the data points.
Question: Why is my SQL query not updating user properties other than 'user' in Node.js and MySQL?

I have a Service method to update a user from the database:
const updateUser = async (user) => {
    const {firstName, lastName, email, password, phone, dob, countryid, gender, address, role, id} = user;
    const sql = `UPDATE user set user_firstName = ?, user_lastName = ?, user_email = ?, user_password = ?, user_phoneNumber = ?, user_dob= ?, user_countryId = ?, user_gender = ?, user_address = ?, user_role= ? WHERE client_id = ?`;
    try {
        await db.query(sql, [firstName, lastName, email, password, phone, dob, countryid, gender, address, role, id]);
        return { message: "records updated successfully." }
    } catch (error) {
        return { message: "Failed to updated" }
    }
}

whenever I log user alone it can read it, but it's not reading any other properties ( firstName etc...) and getting this error: Bind parameters must not contain undefined. To pass SQL NULL specify JS null.
preview of console.log(user):

my route is working perfectly, the same function has been used before without any issues


Answer:
The user argument you're printing out isn't an object representing a user, it's an array with a single such element. In addition, the object itself doesn't have the firstName and lastName properties you're trying to use, it has firstname and lastname (notice the lowercase ns). Since they aren't there, they get undefined values
Assuming you intended to pass an array to the function, you should probably iterate over all the users an update each of them. Regarding the properties, if you replace firstName and lastName with firstname and lastname, respectively, you should be OK:
const updateUser = async (users) => {
    users.forEach(user => {
        const {firstname, lastname, email, password, phone, dob, countryid, gender, address, role, id} = user; // Here
        const sql = `UPDATE user set user_firstName = ?, user_lastName = ?, user_email = ?, user_password = ?, user_phoneNumber = ?, user_dob= ?, user_countryId = ?, user_gender = ?, user_address = ?, user_role= ? WHERE client_id = ?`;
        try {
            await db.query(sql, [firstname, lastname, email, password, phone, dob, countryid, gender, address, role, id]); // And here!
            return { message: "records updated successfully." }
        } catch (error) {
            return { message: "Failed to updated" }
        }
    }
});
Question: Conditionally project a field value in mongodb

**I have a mongo document as below.
**
{
  "metadata": {
    "docId": "7b96a"
  },
  "items": {
    "content": "abcd",
    "contentWithInfo": "content with additional info"
  }
}

I want to project content field based on the condition whether contentWithInfo field is present or not. If contentWithInfo is present, it's value should be projected as content field value and contentWithInfo should be empty. Otherwise content should be projected as is. Is it possible?
I tried the following shell query:
db.collection1.aggregate([
  {
    "$match": {
      "metadata.docId": {
        "$in": [
          "7b96a"
        ]
      }
    }
  },
  {
    "$unwind": "$items"
  },
  {
    "$project": {
      "metadata": 1,
      "items.content": {
        "$cond": {
          "if": {
            "$eq": [
              "$items.contentWithInfo",
              null
            ]
          },
          "then": "$items.content",
          "else": "$items.contentWithInfo"
        }
      }
    }
  }
])


If contentWithInfo is present, it is returning the following:
{
  "metadata": {
    "docId": "7b96a"
  },
  "items": {
    "content": "content with additional info"
  }
}

If contentWithInfo is not present, it is returning the following:
{
  "metadata": {
    "docId": "7b96a"
  },
  "items": {}
}


whereas I expect it to return
{
  "metadata": {
    "docId": "7b96a"
  },
  "items": {
    "content": "abcd"
  }
}



Answer:
Approach 1
Instead of checking items.contentWithInfo is null, check whether the items.contentWithInfo is missing with $type operator.
db.collection.aggregate([
  {
    "$match": {
      "metadata.docId": {
        "$in": [
          "7b96a"
        ]
      }
    }
  },
  {
    "$unwind": "$items"
  },
  {
    "$project": {
      "metadata": 1,
      "items.content": {
        "$cond": {
          "if": {
            "$eq": [
              {
                $type: "$items.contentWithInfo"
              },
              "missing"
            ]
          },
          "then": "$items.content",
          "else": "$items.contentWithInfo"
        }        
      }
    }
  }
])

Demo Approach 1 @ Mongo Playground
Another approach, if you want items.content as default value if items.contentWithInfo is missing or null, you can use $ifNull operator.
db.collection.aggregate([
  {
    "$match": {
      "metadata.docId": {
        "$in": [
          "7b96a"
        ]
      }
    }
  },
  {
    "$unwind": "$items"
  },
  {
    "$project": {
      "metadata": 1,
      "items.content": {
        $ifNull: [
          "$items.contentWithInfo",
          "$items.content"
        ]
      }
    }
  }
])

Demo Approach 2 @ Mongo Playground
Question: "You have requested more vCPU capacity", when launching G instance

I have this error when launching g4dn.xlarge instance
You have requested more vCPU capacity than your current vCPU limit of 0 allows for the instance bucket that the specified instance type belongs to. Please visit http://aws.amazon.com/contact-us/ec2-request to request an adjustment to this limit.

However my Service Quota is like this below

All G and VT Spot Instance Requestss is 8
And I don't launch another G instance at the same time.
Where should I check?
Or is it relevant?(EC2 -> Limit, It shows  Limits page deactivated)
(I can jump to the service quota page from the link in this page though)



Answer:
Ensure you are requesting a spot instance when you configure the launch of your vm. There is a check box under the Advanced section of the launch wizard.