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What is a “callable”?
...0;
if (PyInstance_Check(x)) {
PyObject *call = PyObject_GetAttrString(x, "__call__");
if (call == NULL) {
PyErr_Clear();
return 0;
}
/* Could test recursively but don't, for fear of endless
recursion if some joker sets self.__cal...
RegEx backreferences in IntelliJ
...ables with dollar-curly wrappers, ie, '+ var +' to ${var} in some template strings and couldn't figure out why intellij wouldn't finish the replacement. turns out $ needs to be escaped in the replacement.
– worc
Oct 18 '17 at 21:39
...
What are all the uses of an underscore in Scala?
...ame: => Int): () => Int = callByName _
Default initializer
var x: String = _ // unloved syntax may be eliminated
There may be others I have forgotten!
Example showing why foo(_) and foo _ are different:
This example comes from 0__:
trait PlaceholderExample {
def process[A](f: A =...
Regular expression to return text between parenthesis
...ans you will get whatever in 's' :\. It will be good if you check that the string has parenthesis first.
– Omar
May 26 '16 at 1:21
...
WiX tricks and tips
...sy way to include the product version in the welcome dialog title by using Strings.wxl for localization. (Credit: saschabeaumont. Added as this great tip is hidden in a comment)
<WixLocalization Culture="en-US" xmlns="http://schemas.microsoft.com/wix/2006/localization">
<String Id="Wel...
recursion versus iteration
...i ++)
sum += i;
return sum;
}
public static void main(String args[]) {
Scanner stdin = new Scanner(System.in);
System.out.print("Please enter a number: ");
int n = stdin.nextInt();
System.out.println("The " + n + "-th triangular number is: " +
...
Display current date and time without punctuation
... or newer):
${parameter@operator} - P operator
The expansion is a string that is the result of expanding the value of parameter as if it were a prompt string.
$ show_time() { local format='\D{%Y%m%d%H%M%S}'; echo "${format@P}"; }
$ show_time
20180724003251
...
Why are dates calculated from January 1st, 1970?
...ongly suggest instead serializing date-time values as unambiguous ISO 8601 strings for data interchange rather than an integer count-since-epoch: YYYY-MM-DDTHH:MM:SS.SSSZ such as 2014-10-14T16:32:41.018Z.
Count Of What Since Epoch
Another issue with count-since-epoch time tracking is the time unit, ...
Url.Action parameters?
...ntroller action passing the two parameters:
public ActionResult GetByList(string name, string contact)
{
...
}
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URL rewriting with PHP
... Instead of hard-coding it, you could just use regex to ignore the string completely. In other words, the only thing that counts is the ID part. Going to picture.php/invalid-text/51 would also redirect to the same location. You could also add a check to see if the string is correct and if no...