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Java: int array initializes with nonzero elements
According to the JLS, an int array should be filled by zeros just after initialization. However, I am faced with a situation where it is not. Such a behavior occurs first in JDK 7u4 and also occurs in all later updates (I use 64-bit implementation). The following code throws exception:
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Logical operators for boolean indexing in Pandas
... Python to convert (a['x']==1) and (a['y']==10) to boolean values.
NumPy arrays (of length greater than 1) and Pandas objects such as Series do not have a boolean value -- in other words, they raise
ValueError: The truth value of an array is ambiguous. Use a.empty, a.any() or a.all().
when use...
'and' (boolean) vs '&' (bitwise) - Why difference in behavior with lists vs numpy arrays?
...difference in behavior of boolean and bitwise operations on lists vs NumPy arrays?
8 Answers
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Position of least significant bit that is set
... It seems to me that both value 0x01 and 0x00 result in value 0 from the array. Apparently this trick will indicate that the lowest bit is set if 0 is passed in!
– abelenky
Sep 16 '16 at 3:16
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How can I detect if the user is on localhost in PHP?
...ddress of the client requesting is given by the web server.
$whitelist = array(
'127.0.0.1',
'::1'
);
if(!in_array($_SERVER['REMOTE_ADDR'], $whitelist)){
// not valid
}
share
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impro...
How to get index of object by its property in JavaScript?
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As the other answers suggest, looping through the array is probably the best way. But I would put it in it's own function, and make it a little more abstract:
function findWithAttr(array, attr, value) {
for(var i = 0; i < array.length; i += 1) {
if(array[i][a...
Using Default Arguments in a Function
...g($params)) {
// single argument given as string
} else if (is_array($params)) {
// params could be an array of properties like array('x' => 'x1', 'y' => 'y1')
} else if (func_num_args() == 3) {
$args = func_get_args();
// 3 parameters passed
} else...
Why is a C++ Vector called a Vector?
...d Template Library, was looking for a name to distinguish it from built-in arrays. He admits now that he made a mistake, because mathematics already uses the term 'vector' for a fixed-length sequence of numbers. C++11 compounds this mistake by introducing a class 'array' that behaves similarly to ...
How to convert an ArrayList containing Integers to primitive int array?
I'm trying to convert an ArrayList containing Integer objects to primitive int[] with the following piece of code, but it is throwing compile time error. Is it possible to convert in Java?
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Can a Byte[] Array be written to a file in C#?
I'm trying to write out a Byte[] array representing a complete file to a file.
8 Answers
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