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Is Integer Immutable
... not change.
final Integer a = 3;
final Integer b = 3;
a += b; // compile error, the variable `a` is immutable, too.
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How can I get the last 7 characters of a PHP string?
...e return the provided string.
or do this if you need to return message or error if length is less then 7
$newstring = (strlen($dynamicstring)>7)?substr($dynamicstring, -7):"message";
substr documentation
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How to delete a whole folder and content?
...ble NPE here : fileOrDirectory.listFiles() may return null if there is I/O error when reading the files. This is stated clearly in the documentation : developer.android.com/reference/java/io/File.html#listFiles()
– Brian Yencho
Mar 6 '18 at 15:51
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What is the difference between an ordered and a sorted collection?
...t way to sort it.
As it happens in jvm memory, it can throw Out of Memory error.
2. Order collection
Order collection is sorting a collection by specifying the order-by clause in query for sorting this collection when retrieval.
If your collection is very large, it will be more efficient...
Creating a “logical exclusive or” operator in Java
...ated.
This is especially useful if the second operand would results in an error.
e.g.
if (set == null || set.isEmpty())
// or
if (list != null && list.size() > 0)
However with XOR, you always have to evaluate the second operand to get the result so the only meaningful operation is ^.
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What's the difference between & and && in MATLAB?
...ntees a condition without which the second expression may cause a run-time error. e.g. d != 0 && 1/d vs d !=0 & 1/d - the first guarantees no division by zero, the second doesn't.
– Fraser
Nov 14 '16 at 17:06
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Client on node: Uncaught ReferenceError: require is not defined
...er process sits in an HTML file between script tags and generates the same error.
The line
const {ipcRenderer} = require('electron')
throws the Uncaught ReferenceError: require is not defined
I was able to work around that by specifying node integration as true when the browser window (where th...
Simple way to encode a string according to a password?
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@smehmood I'm getting the following error 'str' object cannot be interpreted as an integer
– Rohit Khatri
Nov 16 '16 at 12:23
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Cartesian product of x and y array points into single array of 2D points
...rrays, name_func)
# `cartesian_product_recursive` throws an
# unexpected error when used on more than
# two input arrays, so for now I've removed
# it from these tests.
def test_cartesian(*in_arrays):
test(in_arrays, name_func[2:4] + name_func[-1:])
x10 = [numpy.arange(10)]
x50 = [numpy.aran...
How do I move a file with Ruby?
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File rename won't work across partitions, and throws the error "Invalid cross-device link". FileUtils is a better choice in those cases, but for a simple move in the same partition, rename works.
– d3vkit
Jan 25 '13 at 4:06
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