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Android and setting alpha for (image) view alpha
Is there really no XML attribute counterpart to setAlpha(int) ?
9 Answers
9
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Declaring and initializing variables within Java switches
...in other cases - it leads to highly confusing code, as you've seen. When I introduce local variables in switch statements (which I try to do rarely - cases should be very short, ideally) I usually prefer to introduce a new scope:
case 1: {
int value = 1;
...
break;
}
case 2: {
int v...
How to reverse a singly linked list using only two pointers?
...f there exists some logic to reverse a singly-linked list using only two pointers.
33 Answers
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Why are preprocessor macros evil and what are the alternatives?
... != 0) res = x/y;
and then
if (something) safe_divide(b, a, x);
else printf("Something is not set...");
It actually becomes completely the wrong thing....
Replacement: real functions.
3) Macros have no namespace
If we have a macro:
#define begin() x = 0
and we have some code in C++ tha...
Iterate two Lists or Arrays with one ForEach statement in C#
...lt;string> names = new string[] { "one", "two", "three" };
IList<int> ids = new int[] { 1, 2, 3, 4 };
foreach (KeyValuePair<string, int> keyValuePair in ParallelEnumerate(names, ids))
{
Console.WriteLine(keyValuePair.Key ?? "<null>" + " - " + keyValuePair.Va...
Android 4.1: How to check notifications are disabled for the application?
... String pkg = context.getApplicationContext().getPackageName();
int uid = appInfo.uid;
Class appOpsClass = null; /* Context.APP_OPS_MANAGER */
try {
appOpsClass = Class.forName(AppOpsManager.class.getName());
Method checkOpNoThrowMethod = appOps...
How does delete[] know it's an array?
...er doesn't know it's an array, it's trusting the programmer. Deleting a pointer to a single int with delete [] would result in undefined behavior. Your second main() example is unsafe, even if it doesn't immediately crash.
The compiler does have to keep track of how many objects need to be delete...
Creating an index on a table variable
... that first.
SQL Server 2014
In addition to the methods of adding constraint based indexes discussed below SQL Server 2014 also allows non unique indexes to be specified directly with inline syntax on table variable declarations.
Example syntax for that is below.
/*SQL Server 2014+ compatible i...
What is the yield keyword used for in C#?
...e function returns an object that implements the IEnumerable<object> interface. If a calling function starts foreaching over this object, the function is called again until it "yields". This is syntactic sugar introduced in C# 2.0. In earlier versions you had to create your own IEnumerable and...
How to correctly iterate through getElementsByClassName
...owser support is patchy, but if you're transpiling then for ... of will be converted, but NodeList.forEach wouldn't.
– Mr5o1
Oct 22 '17 at 1:16
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