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Safe (bounds-checked) array lookup in Swift, through optional bindings?
If I have an array in Swift, and try to access an index that is out of bounds, there is an unsurprising runtime error:
19 A...
JavaScript arrays braces vs brackets
What is the difference between each of the following array definitions.
2 Answers
2
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Min/Max of dates in an array?
How can I find out the min and the max date from an array of dates? Currently, I am creating an array like this:
11 Answers...
How to make a Java Generic method static?
... snippet on how to make a java generic class to append a single item to an array. How can I make appendToArray a static method. Adding static to the method signature results in compile errors.
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How to declare a global variable in php?
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The $GLOBALS array can be used instead:
$GLOBALS['a'] = 'localhost';
function body(){
echo $GLOBALS['a'];
}
From the Manual:
An associative array containing references to all variables which are currently defined in the globa...
Why does sizeof(x++) not increment x?
... The result is an integer. If the type of the operand is a variable length array type, the operand is evaluated; otherwise, the operand is not evaluated and the result is an integer constant.
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Very large matrices using Python and NumPy
...nd. Not bad for a Python-based solution!
Accessing the data as a NumPy recarray again is as simple as:
data = table[row_from:row_to]
The HDF library takes care of reading in the relevant chunks of data and converting to NumPy.
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Modifying a subset of rows in a pandas dataframe
...c here, .loc is primarily label based, but may also be used with a boolean array.
So, what we are doing above is applying df.loc[row_index, column_index] by:
Exploiting the fact that loc can take a boolean array as a mask that tells pandas which subset of rows we want to change in row_index
Ex...
indexOf method in an object array?
What's the best method to get the index of an array which contains objects?
27 Answers
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Difference between Array and List in scala
In what cases I should use Array(Buffer) and List(Buffer). Only one difference that I know is that arrays are nonvariant and lists are covariant. But what about performance and some other characteristics?
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