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Difference between ProcessBuilder and Runtime.exec()
...
The various overloads of Runtime.getRuntime().exec(...) take either an array of strings or a single string. The single-string overloads of exec() will tokenise the string into an array of arguments, before passing the string array onto one of the exec() overloads that takes a string array. The...
Why isn't vector a STL container?
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Does this apply for C++11 std::array<bool> ?
– Sergio Basurco
Dec 4 '15 at 8:06
4
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Easy way to see saved NSUserDefaults?
...retrieving the complete dictionary representation of user defaults:
print(Array(UserDefaults.standard.dictionaryRepresentation()))
For retrieving the keys:
// Using dump since the keys are an array of strings.
dump(Array(UserDefaults.standard.dictionaryRepresentation().keys))
For retrieving th...
Why is the gets function so dangerous that it should not be used?
... characters specified by n
from the stream pointed to by stdin, into the array pointed to by s. No additional
characters are read after a new-line character (which is discarded) or after end-of-file.
The discarded new-line character does not count towards number of characters read. A
null ch...
Are delphi variables initialized with a value by default?
...r
directly or indirectly contain fields (for records) or elements (for
arrays) that are reference-counted like: string, variant, interface
or dynamic array or static array containing such types.
Notes:
record itself is not enough to become reference-counted
I have not tried this with gene...
Is there a 'foreach' function in Python 3?
...ns "for" statement.
These are more or less equivalent:
// PHP:
foreach ($array as $val) {
print($val);
}
// C#
foreach (String val in array) {
console.writeline(val);
}
// Python
for val in array:
print(val)
So, yes, there is a "foreach" in python. It's called "for".
What you're d...
Advantages of Binary Search Trees over Hash Tables
...f a hash function has a range R(h) = 0...100, then you need to allocate an array of 100 (pointers-to) elements, even if you are just hashing 20 elements. If you were to use a binary search tree to store the same information, you would only allocate as much space as you needed, as well as some metada...
Python string.join(list) on object array rather than string array
...fstackoverflow.com%2fquestions%2f497765%2fpython-string-joinlist-on-object-array-rather-than-string-array%23new-answer', 'question_page');
}
);
Post as a guest
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Possible heap pollution via varargs parameter
...not a supertype of the object they point to.
List<A> listOfAs = new ArrayList<>();
List<B> listOfBs = (List<B>)(Object)listOfAs; // points to a list of As
This can lead to "unexplainable" ClassCastExceptions.
// if the heap never gets polluted, this should never throw a C...
Add object to ArrayList at specified index
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You can use Array of objects and convert it to ArrayList-
Object[] array= new Object[10];
array[0]="1";
array[3]= "3";
array[2]="2";
array[7]="7";
List<Object> list= Arrays.asList(array);
ArrayList will be- [1, null, 2, 3, null...