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Compare two Byte Arrays? (Java)
I have a byte array with a ~known binary sequence in it. I need to confirm that the binary sequence is what it's supposed to be. I have tried .equals in addition to == , but neither worked.
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Understanding slice notation
... start through stop-1
a[start:] # items start through the rest of the array
a[:stop] # items from the beginning through stop-1
a[:] # a copy of the whole array
There is also the step value, which can be used with any of the above:
a[start:stop:step] # start through not past s...
What does int argc, char *argv[] mean?
... virtually all implementations will prepend the name of the program to the array.
The variables are named argc (argument count) and argv (argument vector) by convention, but they can be given any valid identifier: int main(int num_args, char** arg_strings) is equally valid.
They can also be omitte...
C: differences between char pointer and array [duplicate]
...ssentially, the former:
char amessage[] = "now is the time";
Defines an array whose members live in the current scope's stack space, whereas:
char *pmessage = "now is the time";
Defines a pointer that lives in the current scope's stack space, but that references memory elsewhere (in this one, ...
Given a class, see if instance has method (Ruby)
... because instance_methods changed between Ruby 1.8 and 1.9. 1.8 returns an array of strings and 1.9 returns an array of symbols. method_defined? takes a symbol in both 1.8 and 1.9.
– Jason
May 2 '12 at 17:03
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Finding the max value of an attribute in an array of objects
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To find the maximum y value of the objects in array:
Math.max.apply(Math, array.map(function(o) { return o.y; }))
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Doctrine - How to print out the real sql, not just the prepared statement?
...dQueryTypes;
public function __construct(AbstractPlatform $dbPlatform, array $loggedQueryTypes=array()){
$this->dbPlatform=$dbPlatform;
$this->loggedQueryTypes=$loggedQueryTypes;
}
/**
* {@inheritdoc}
*/
public function startQuery($sql, array $params =...
Selecting multiple columns in a pandas dataframe
...also get columns. For example, df.ix[0:2, 0:2] gets the upper left 2x2 sub-array just like it does for a NumPy matrix (depending on your column names of course). You can even use the slice syntax on string names of the columns, like df.ix[0, 'Col1':'Col5']. That gets all columns that happen to be or...
How do I check if a given string is a legal/valid file name under Windows?
...expression.
UPD2: Note that according to the Remarks section in MSDN "The array returned from this method is not guaranteed to contain the complete set of characters that are invalid in file and directory names." The answer provided by sixlettervaliables goes into more details.
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How might I find the largest number contained in a JavaScript array?
I have a simple JavaScript Array object containing a few numbers.
28 Answers
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