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How to replace spaces in file names using a bash script
Can anyone recommend a safe solution to recursively replace spaces with underscores in file and directory names starting from a given root directory? For example:
...
How do I make an asynchronous GET request in PHP?
... $parts=parse_url($url);
$fp = fsockopen($parts['host'],
isset($parts['port'])?$parts['port']:80,
$errno, $errstr, 30);
$out = "POST ".$parts['path']." HTTP/1.1\r\n";
$out.= "Host: ".$parts['host']."\r\n";
$out.= "Content-Type: application/x-www-form-urlencoded\r...
MySQL error: key specification without a key length
...s to remove the TEXT or BLOB column from the index or unique constraint or set another field as primary key. If you can't do that, and wanting to place a limit on the TEXT or BLOB column, try to use VARCHAR type and place a limit of length on it. By default, VARCHAR is limited to a maximum of 255 ch...
Converting Python dict to kwargs?
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Select N random elements from a List in C#
...ordinate, and use the first k (for you, k=5) indices to get your random subset. I think this is easy to implement, although it is O(n log n) time.
(2) Init an empty list s = [] that will grow to be the indices of k random elements. Choose a number r in {0, 1, 2, ..., n-1} at random, r = rand % n,...
C pointers : pointing to an array of fixed size
...es to exactly the same discovery and to exactly the same conclusion when (if) they reach certain level of proficiency with C language.
When the specifics of your application area call for an array of specific fixed size (array size is a compile-time constant), the only proper way to pass such an ar...
What is attr_accessor in Ruby?
...! And guess what: the instance variable @name in our person object will be set just like when we did it manually, so you can use it in other methods.
class Person
attr_accessor :name
def greeting
"Hello #{@name}"
end
end
person = Person.new
person.name = "Dennis"
person.greeting # =>...
Apply multiple functions to multiple groupby columns
The docs show how to apply multiple functions on a groupby object at a time using a dict with the output column names as the keys:
...
Good Hash Function for Strings
I'm trying to think up a good hash function for strings. And I was thinking it might be a good idea to sum up the unicode values for the first five characters in the string (assuming it has five, otherwise stop where it ends). Would that be a good idea, or is it a bad one?
...
Is pass-by-value a reasonable default in C++11?
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