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How does a garbage collector avoid an infinite loop here?
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Nate Cook
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answered Jul 9 '14 at 19:49
ServyServy
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How to extract numbers from a string in Python?
...:
>>> import re
>>> re.findall(r'\d+', 'hello 42 I\'m a 32 string 30')
['42', '32', '30']
This would also match 42 from bla42bla. If you only want numbers delimited by word boundaries (space, period, comma), you can use \b :
>>> re.findall(r'\b\d+\b', 'he33llo 42 I\'m ...
Better way to cast object to int
...Exact() — For converting from a string in a specific format
Convert.ToInt32() — For converting an object of unknown type. It will use an explicit and implicit conversion or IConvertible implementation if any are defined.
as int? — Note the "?". The as operator is only for reference types, an...
How to parse a string into a nullable int
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one less line: return Int32.TryParse(s, out i) ? i : null;
– Chris Shouts
Oct 23 '09 at 13:31
2
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What is Bit Masking?
... >> (shift right). This is how we can extract the four bytes from a 32-bit integer:
void more_stuff(uint32_t value) { // Example value: 0x01020304
uint32_t byte1 = (value >> 24); // 0x01020304 >> 24 is 0x01 so
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Does Notepad++ show all hidden characters?
...pt into your text. Usually you'll look at the white-space, and it will say 32 32 32 32, or for Unicode 32 00 32 00 32 00 32 00. You may find the problem this way, providing there isn't masses of code.
Download the Hex Plugin from here;
http://sourceforge.net/projects/npp-plugins/files/Hex%20Editor/...
How to quickly check if folder is empty (.NET)?
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Callum Watkins
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answered Jun 5 '09 at 8:33
Thomas LevesqueThomas Levesque
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SQLite UPSERT / UPDATE OR INSERT
...ostgreSQL syntax.
INSERT INTO players (user_name, age)
VALUES('steven', 32)
ON CONFLICT(user_name)
DO UPDATE SET age=excluded.age;
Note: For those having to use a version of SQLite earlier than 3.24.0, please reference this answer below (posted by me, @MarqueIV).
However if you do...
Why is (object)0 == (object)0 different from ((object)0).Equals((object)0)?
...thod Object.Equals. This is a virtual method which will filter down to Int32.Equals and this checks for a boxed integer. Both integer values are 0 hence they are equal
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error: passing xxx as 'this' argument of xxx discards qualifiers
...give a more detail example. As to the below struct:
struct Count{
uint32_t c;
Count(uint32_t i=0):c(i){}
uint32_t getCount(){
return c;
}
uint32_t add(const Count& count){
uint32_t total = c + count.getCount();
return total;
}
};
As you see...