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Are there strongly-typed collections in Objective-C?
...<NSString*>* arr = @[@"str"];
NSString* string = [arr objectAtIndex:0];
NSNumber* number = [arr objectAtIndex:0]; // Warning: Incompatible pointer types initializing 'NSNumber *' with an expression of type 'NSString *'
And in Swift code, they will produce a compiler error:
var str: String ...
How to create a bash script to check the SSH connection?
...h -q user@downhost exit
$ echo $?
255
$ ssh -q user@uphost exit
$ echo $?
0
EDIT: Another approach would be to use nmap (you won't need to have keys or login-stuff):
$ a=`nmap uphost -PN -p ssh | grep open`
$ b=`nmap downhost -PN -p ssh | grep open`
$ echo $a
22/tcp open ssh
$ echo $b
(empty st...
Safely turning a JSON string into an object
...
1990
JSON.parse(jsonString) is a pure JavaScript approach so long as you can guarantee a reasonably m...
Delete files older than 3 months old in a directory using .NET
...
answered Feb 8 '10 at 14:57
Steve DannerSteve Danner
20.3k77 gold badges3333 silver badges4848 bronze badges
...
How to reverse a string in Go?
...e.
func Reverse(s string) string {
runes := []rune(s)
for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
runes[i], runes[j] = runes[j], runes[i]
}
return string(runes)
}
share
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...
Counting the occurrences / frequency of array elements
...oo(arr) {
var a = [], b = [], prev;
arr.sort();
for ( var i = 0; i < arr.length; i++ ) {
if ( arr[i] !== prev ) {
a.push(arr[i]);
b.push(1);
} else {
b[b.length-1]++;
}
prev = arr[i];
}
return [a, b];
}
Li...
Convert int to string?
... |
edited Mar 14 at 1:20
answered Jun 21 '10 at 3:15
Ant...
JavaScript: remove event listener
... variable needs to be outside the handler to increment.
var click_count = 0;
function myClick(event) {
click_count++;
if(click_count == 50) {
// to remove
canvas.removeEventListener('click', myClick);
}
}
// to add
canvas.addEventListener('click', myClick);
EDIT: You...
Print a string as hex bytes?
...: Hello world !! and I want to print it using Python as 48:65:6c:6c:6f:20:77:6f:72:6c:64:20:21:21 .
13 Answers
...
Adding Only Untracked Files
... |
edited Aug 17 '17 at 20:29
Joel M.
22811 gold badge22 silver badges1212 bronze badges
answered Sep 1...