[Solved] Preg_match for a string key

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The regex would be this: /^[A-Z0-9]{5}-[A-Z0-9]{5}-[A-Z0-9]{5}-[A-Z0-9]{5}-[A-Z0-9]{5}$/ Regex explanation: Start regex expression /^ Capital A-Z and Numerical 0-9 [A-Z0-9] 5 long exactly {5} Dash between sets End expression $/ <?php $reg = ‘/^[A-Z0-9]{5}-[A-Z0-9]{5}-[A-Z0-9]{5}-[A-Z0-9]{5}-[A-Z0-9]{5}$/’; $string = ‘YTMG3-N6DKC-DKB77-7M9GH-8HVX7’; preg_match($reg, $string, $matches, PREG_OFFSET_CAPTURE); print_r($matches); ?> 7 solved Preg_match for a string key

[Solved] How to make a small, node-like circle in CSS

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I got you fam. 1) Let’s create some CSS circles. Hella easy with border-radius. <div class=”circle”></div> .circle { border: 5px solid black; border-radius: 50%; width: 100px; height: 100px; } Look at this gorgeous circle! Now we need some child nodes. MOAR CIRCLES! Also, we should start thinking about positionin’ these circles. position: absolute? Pssh, You … Read more

[Solved] How to save python script as txt? [closed]

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Does this works out fine for you? First read in the python file and save it in a variable and them simply write it out on another file. def write_python_file(filename): with open(filename) as f: data = f.read() f.close() with open(“Data.txt”, mode=”w”) as f: f.write(data) f.close() write_python_file(“filename.py”) # Replace with your python file. Hope so this … Read more

[Solved] I’m not sure how to get this class to work

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You must reference the class you have created to access the variable within it. class Status(object): def __init__(self,piece,pawn_black1_status): self.piece=piece self.pawn_black1_status=pawn_black1_status def Status2(self,piece,pawn_black1_status): self.piece=piece self.pawn_black1_status=pawn_black1_status self.pawn_black1_status=”dead” pawn_black1_status=”alive” Pawn1b_status=Status(“p1b”,pawn_black1_status) Pawn1b_status.Status2(“p1b”,pawn_black1_status) print(Pawn1b_status.pawn_black1_status) 1 solved I’m not sure how to get this class to work

[Solved] Group by and calculation from value on the next row

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You can easily calculate the % difference using lag() select name, date, number, Cast(((number * 1.0) – Lag(number,1) over(partition by name order by date))/ Lag(number,1) over(partition by name order by date) * 100 as int) from table solved Group by and calculation from value on the next row

[Solved] How to get specific document data from firebase and return as a string

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It works for me Widget build(BuildContext context) { return new StreamBuilder( stream: Firestore.instance.collection(‘COLLECTION_NAME’).document(‘TEST’).snapshots(), builder: (context, snapshot) { if (!snapshot.hasData) { return Center(child: CircularProgressIndicator()); } var userDocument = snapshot.data; return new Text(userDocument[“property_name”]); } ); } 1 solved How to get specific document data from firebase and return as a string

[Solved] How to understand [], (), compound literal operator, . and -> are postfix operators?

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The language specification defines the syntax, and doesn’t care what you call the parts that make up the language. In abc->def, the first operand is abc, and -> is the operator and def is the second operand, but it is restricted to an identifier is the name of a member of the structure or union … Read more

[Solved] How this is calculating size in c?

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First and foremost, please don’t write code this way… *(&arr + 1) is undefined behavior… Note: This answer assumes sizeof(int) = 4. What is arr? It’s an array of 9 ints printf(“%zu\n”, sizeof(arr)); // 36 bytes printf(“%p\n”, (void *)arr); // 0x7ffed90f48a0 What is &arr? It’s a pointer to an array or ints = int (*)[9] … Read more