man | The OpenCL Community Specification

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man is a HTML library. man has no bugs, it has no vulnerabilities and it has low support. However man has a Non-SPDX License. You can download it from GitHub.

The OpenCL Community Specification

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Support

man has a low active ecosystem.

It has 10 star(s) with 3 fork(s). There are 5 watchers for this library.

It had no major release in the last 6 months.

There are 1 open issues and 0 have been closed. There are 3 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of man is current.

Quality

man has no bugs reported.

Security

man has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

man has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

man releases are not available. You will need to build from source code and install.

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man Key Features

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Community Discussions

Trending Discussions on man

What are the differences between GNU grep's basic/extended and PCRE (`-P`) regular expressions?

Using std::atomic with futex system call

Trying to merge nested properties of objects inside array into single object containing all nested properties using reduce, only getting single value

Sending and email with the auto Increment number attached to the email using PDO/MySQL

how to filter json file with specific tag values and get output into csv

How does this Zebra solution in prolog work?

Regex that matches chapter name

How to reformat a corrupt json file with escaped ' and "?

How to easily merge two anonymous objects with different data structure?

How do I loop through a JSON file with multiple sub-keys in Python?

QUESTION

What are the differences between GNU grep's basic/extended and PCRE (`-P`) regular expressions?

Asked 2021-Jun-15 at 20:55

GNU grep's basic (BRE) and extended (ERE) syntax is documented at https://www.gnu.org/software/grep/manual/html_node/Regular-Expressions.html and PCRE is summarized at man pcresyntax, but there is no explicit comparison. What are the differences between GNU grep's basic/extended and PCRE (-P) regular expressions?

...

ANSWER

Answered 2021-Jun-15 at 20:55

My research of the major syntax and functionality differences from http://www.greenend.org.uk/rjk/tech/regexp.html:

. in GNU grep does not match null bytes and newlines (but does match newlines when used with --null-data), while Perl, everything except \n is matched.
[...] in GNU grep defines POSIX bracket expressions, while Perl uses "character" classes. I'm not sure on the details. See http://www.greenend.org.uk/rjk/tech/regexp.html#bracketexpression
"In basic regular expressions the meta-characters ?, +, {, |, (, and ) lose their special meaning; instead use the backslashed versions \?, \+, \{, \|, \(, and \)." From https://www.gnu.org/software/grep/manual/html_node/Basic-vs-Extended.html. ERE matches PCRE syntax.
GNU grep \w and \W are the same as [[:alnum:]] and [^[:alnum]], while Perl uses alphanumeric and underscore.
GNU grep has \< and \> for start and end of word.

Perl supports much more additional functionality:

"nongreedy {}" with syntax re{...}?
additional anchors and character types \A, \C, \d, \D, \G, \p, \P, \s, \S, \X. \Z, \z.
(?#comment)
shy grouping (?:re), shy grouping + modifiers (?modifiers:re)
lookahead and negative lookahead (?=re) and (?!re), lookbehind and negative lookbehind (?<=p) and (?


Atomic groups (?>re)
Conditional expression (?(cond)re)
... and more, see man pcresyntax

Source https://stackoverflow.com/questions/67943781

QUESTION

Using std::atomic with futex system call

Asked 2021-Jun-15 at 20:48

In C++20, we got the capability to sleep on atomic variables, waiting for their value to change. We do so by using the std::atomic::wait method.

Unfortunately, while wait has been standardized, wait_for and wait_until are not. Meaning that we cannot sleep on an atomic variable with a timeout.

Sleeping on an atomic variable is anyway implemented behind the scenes with WaitOnAddress on Windows and the futex system call on Linux.

Working around the above problem (no way to sleep on an atomic variable with a timeout), I could pass the memory address of an std::atomic to WaitOnAddress on Windows and it will (kinda) work with no UB, as the function gets void* as a parameter, and it's valid to cast std::atomic to void*

On Linux, it is unclear whether it's ok to mix std::atomic with futex. futex gets either a uint32_t* or a int32_t* (depending which manual you read), and casting std::atomic to u/int* is UB. On the other hand, the manual says

The uaddr argument points to the futex word. On all platforms, futexes are four-byte integers that must be aligned on a four- byte boundary. The operation to perform on the futex is specified in the futex_op argument; val is a value whose meaning and purpose depends on futex_op.

Hinting that alignas(4) std::atomic should work, and it doesn't matter which integer type is it is as long as the type has the size of 4 bytes and the alignment of 4.

Also, I have seen many places where this trick of combining atomics and futexes is implemented, including boost and TBB.

So what is the best way to sleep on an atomic variable with a timeout in a non UB way? Do we have to implement our own atomic class with OS primitives to achieve it correctly?

(Solutions like mixing atomics and condition variables exist, but sub-optimal)

...

ANSWER

Answered 2021-Jun-15 at 20:48

You shouldn't necessarily have to implement a full custom atomic API, it should actually be safe to simply pull out a pointer to the underlying data from the atomic and pass it to the system.

Since std::atomic does not offer some equivalent of native_handle like other synchronization primitives offer, you're going to be stuck doing some implementation-specific hacks to try to get it to interface with the native API.

For the most part, it's reasonably safe to assume that first member of these types in implementations will be the same as the T type -- at least for integral values ^[1]. This is an assurance that will make it possible to extract out this value.

... and casting std::atomic to u/int* is UB

This isn't actually the case.

std::atomic is guaranteed by the standard to be Standard-Layout Type. One helpful but often esoteric properties of standard layout types is that it is safe to reinterpret_cast a T to a value or reference of the first sub-object (e.g. the first member of the std::atomic).

As long as we can guarantee that the std::atomic contains only the u/int as a member (or at least, as its first member), then it's completely safe to extract out the type in this manner:

Source https://stackoverflow.com/questions/67034029

QUESTION

Trying to merge nested properties of objects inside array into single object containing all nested properties using reduce, only getting single value

Asked 2021-Jun-15 at 15:16

I have an array of objects each with a groupName key/value and then an item key with an array of objects as it's value.

I'm trying to use .reduce() with a forEach to iterate over the main array and merge all of the item values into a new Object with a single groupName and an items array containing all the original item values.

Every time I run the function I only get back the first value and I'm trying to figure out what I'm doing wrong.

Current Function:

...

ANSWER

Answered 2021-Jun-15 at 15:16

You can use array#map and array#concat to merge items in movie array.

Source https://stackoverflow.com/questions/67988940

QUESTION

Sending and email with the auto Increment number attached to the email using PDO/MySQL

Asked 2021-Jun-15 at 13:47

Hello my favorite people!

I am trying to send an email after submitting a form, with the AUTO INCREMENT number attached to the email because the AUTO INCREMENT number is the clients Job Card Reference Number. So far i have successfully created the insert script which inserts the data into the database perfectly, and also sends the email too. But does not attach the AUTO INCREMENT number into the email. The INT(11) AUTO INCREMENT primary key is "job_number" in my MySQL database.

Here is my insert page:

...

ANSWER

Answered 2021-Jun-15 at 09:58

 $insertId = false;
 if($insert_stmt->execute())
    {
     $insertId = $insert_stmt->insert_id;      
     $insertMsg="Created Successfully........sending email now"; 

     
    }

if($insertId){

   // do stuff with the insert id
}

Source https://stackoverflow.com/questions/67983640

QUESTION

how to filter json file with specific tag values and get output into csv

Asked 2021-Jun-15 at 01:54

I have created a json file with the output having key values pair. But i would like to filter more and get only specific tags and get new output in table using excel (csv) format

...

ANSWER

Answered 2021-Jun-15 at 01:54

To achieve the "expected" output given the "actual" output, you could use the following filter:

Source https://stackoverflow.com/questions/67978941

QUESTION

How does this Zebra solution in prolog work?

Asked 2021-Jun-14 at 21:51

zebra_owner(Owner) :-
    houses(Hs),
    member(h(Owner,zebra,_,_,_), Hs).

water_drinker(Drinker) :-
    houses(Hs),
    member(h(Drinker,_,_,water,_), Hs).


houses(Hs) :-
    length(Hs, 5),                                            %  1
    member(h(english,_,_,_,red), Hs),                         %  2
    member(h(spanish,dog,_,_,_), Hs),                         %  3
    member(h(_,_,_,coffee,green), Hs),                        %  4
    member(h(ukrainian,_,_,tea,_), Hs),                       %  5
    adjacent(h(_,_,_,_,green), h(_,_,_,_,white), Hs),         %  6
    member(h(_,snake,winston,_,_), Hs),                       %  7
    member(h(_,_,kool,_,yellow), Hs),                         %  8
    Hs = [_,_,h(_,_,_,milk,_),_,_],                           %  9
    Hs = [h(norwegian,_,_,_,_)|_],                            % 10
    adjacent(h(_,fox,_,_,_), h(_,_,chesterfield,_,_), Hs),        % 11
    adjacent(h(_,_,kool,_,_), h(_,horse,_,_,_), Hs),              % 12
    member(h(_,_,lucky,juice,_), Hs),                         % 13
    member(h(japanese,_,kent,_,_), Hs),                       % 14
    adjacent(h(norwegian,_,_,_,_), h(_,_,_,_,blue), Hs),          % 15
    member(h(_,_,_,water,_), Hs),       % one of them drinks water
    member(h(_,zebra,_,_,_), Hs).       % one of them owns a zebra

adjacent(A, B, Ls) :- append(_, [A,B|_], Ls).
adjacent(A, B, Ls) :- append(_, [B,A|_], Ls).

...

ANSWER

Answered 2021-Jun-14 at 21:46

The houses list Hs is not empty at all, ever. It is created right at the very beginning with

Source https://stackoverflow.com/questions/67975434

QUESTION

Regex that matches chapter name

Asked 2021-Jun-13 at 17:46

I'm modifying a text e-book that has sequences like this:

...

ANSWER

Answered 2021-Jun-13 at 17:46

You can use

Source https://stackoverflow.com/questions/67960824

QUESTION

How to reformat a corrupt json file with escaped ' and "?

Asked 2021-Jun-13 at 11:41

Problem

I have a large JSON file (~700.000 lines, 1.2GB filesize) containing twitter data that I need to preprocess for data and network analysis. During the data collection an error happend: Instead of using " as a seperator ' was used. As this does not conform with the JSON standard, the file can not be processed by R or Python.

Information about the dataset: Every about 500 lines start with meta info + meta information for the users, etc. then there are the tweets in json (order of fields not stable) starting with a space, one tweet per line.

This is what I tried so far:

A simple data.replace('\'', '\"') is not possible, as the "text" fields contain tweets which may contain ' or " themselves.
Using regex, I was able to catch some of the instances, but it does not catch everything: re.compile(r'"[^"]*"(*SKIP)(*FAIL)|\'')
Using literal.eval(data) from the ast package also throws an error.

As the order of the fields and the legth for each field is not stable I am stuck on how to reformat that file in order to conform to JSON.

Normal sample line of the data (for this options one and two would work, but note that the tweets are also in non-english languages, which use " or ' in their tweets):

...

ANSWER

Answered 2021-Jun-07 at 13:57

if the ' that are causing the problem are only in the tweets and desciption you could try that

Source https://stackoverflow.com/questions/67872063

QUESTION

How to easily merge two anonymous objects with different data structure?

Asked 2021-Jun-12 at 10:26

I would like to merge these two anonymous objects:

...

ANSWER

Answered 2021-Jun-12 at 09:19

There's nothing built-in in the C# language to support your use case. Thus, the question in your title needs to be answered with "Sorry, there is no easy way".

I can offer the following alternatives:

Do it manually:

Source https://stackoverflow.com/questions/67946924

QUESTION

How do I loop through a JSON file with multiple sub-keys in Python?

Asked 2021-Jun-11 at 09:15

I have a json file:- ...

ANSWER

Answered 2021-Jun-11 at 09:15

you can always check the length of list and make a loop to iterate over that length.

Source https://stackoverflow.com/questions/67931339

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