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Technically, why are processes in Erlang more efficient than OS threads?
...use today have the same safety properties (ECMAScript, Java, C♯, VB.NET, PHP, Perl, Python, Ruby, Clojure, Scala, Kotlin, Groovy, Ceylon, F♯, OCaml, the "Objective" part of "Objective-C", the "++" part of "C++"). If it weren't for legacy C code, and legacy features of C++ and Objective-C, we wou...
What is a reasonable code coverage % for unit tests (and why)? [closed]
...ible exception; of course you can't do that. You SHOULD aim to test every block of code that handles exceptions. For example, if you have a requirement that when block X throws an exception, the exception is logged in the database, the green stripe at the bottom of the screen turns red, and an ema...
What are the precise rules for when you can omit parenthesis, dots, braces, = (functions), etc.?
...ss-by-name parameter, which results in a String (that is, it can be a code block which returns a string) as opposed to function parameters,
def myOp(functionParam: () => String)
which says myOp takes a function which has zero parameters and returns a String.
(Mind you, pass-by-name parameters...
How to handle Back button with in the dialog?
...vent.getAction() == KeyEvent.ACTION_UP to the answer. Without it, the code block will be executed twice. (Key DOWN and key UP). In this example it is not so important, but for other actions than finish(), it might be very important.
– Udo Klimaschewski
Nov 3 '1...
What is the dual table in Oracle?
...IO was usually logical IO (not involving physical disk access) as the disk blocks were usually already cached in memory. This resulted in a large amount of logical IO against the DUAL table.
Later versions of the Oracle database have been optimized and the database no longer performs physical or lo...
How to list out all the subviews in a uiviewcontroller in iOS?
...on:
@implementation UIView (childViews)
- (NSArray*) allSubviews {
__block NSArray* allSubviews = [NSArray arrayWithObject:self];
[self.subviews enumerateObjectsUsingBlock:^( UIView* view, NSUInteger idx, BOOL*stop) {
allSubviews = [allSubviews arrayByAddingObjectsFromArray:[view ...
How can I list the contents of a directory in Python?
Can’t be hard, but I’m having a mental block.
8 Answers
8
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What is Gradle in Android Studio?
...
PHING of PHP
– Yousha Aleayoub
Jul 25 '18 at 17:34
16
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How to show the loading indicator in the top status bar
... Thanks @Schrockwell, I further improved it by using synchronized blocks - I saw a race condition where the activity was not decreased properly.
– Resh32
Dec 19 '12 at 8:50
...
How can prepared statements protect from SQL injection attacks?
...nd even alter it, as every SQL injection example shows it (all examples in PHP/Mysql):
$expected_data = 1;
$query = "SELECT * FROM users where id=$expected_data";
will produce a regular query
SELECT * FROM users where id=1
while this code
$spoiled_data = "1; DROP TABLE users;"
$query ...