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How do I declare an array of weak references in Swift?
...lace(objects.map { WeakObject(object: $0) })
}
}
Usage
var alice: NSString? = "Alice"
var bob: NSString? = "Bob"
var cathline: NSString? = "Cathline"
var persons = WeakObjectSet<NSString>()
persons.addObject(bob!)
print(persons.allObjects) // [Bob]
persons.addObject(bob!)
print(person...
What is the difference between a strongly typed language and a statically typed language?
...amic) type error.
For example, Lua, a dynamically typed language, has a string type, a number type, and a Boolean type, among others. In Lua every value belongs to exactly one type, but this is not a requirement for all dynamically typed languages. In Lua, it is permissible to concatenate two s...
Different bash prompt for different vi editing mode?
...
Bash 4.4 / Readline 7.0 will add support for user-settable mode strings.
You can try the beta versions, but they seem a bit buggy at the moment. They also don't yet support specifying where in the prompt you want the mode indicator to occur (which I think is the killer feature).
If you ...
How to set Sqlite3 to be case insensitive when string comparing?
I want to select records from sqlite3 database by string matching. But if I use '=' in the where clause, I found that sqlite3 is case sensitive. Can anyone tell me how to use string comparing case-insensitive?
...
String to Dictionary in Python
...mport json # or `import simplejson as json` if on Python < 2.6
json_string = u'{ "id":"123456789", ... }'
obj = json.loads(json_string) # obj now contains a dict of the data
share
|
impro...
How do I load a file from resource folder?
...csv", YourCallingClass.class);
Path path = Paths.get(url.toURI());
List<String> lines = Files.readAllLines(path, StandardCharsets.UTF_8);
// java.io.InputStream
InputStream inputStream = ClassLoaderUtil.getResourceAsStream("test.csv", YourCallingClass.class);
InputStreamReader streamReader...
What's the difference between array_merge and array + array?
...rged);
This outputs:
plus sign merge
array(4) {
["a"]=>
string(3) "one"
["b"]=>
string(3) "two"
["c"]=>
string(5) "three"
[3]=>
string(12) "number three"
}
array_merge function merge
array(4) {
["a"]=>
string(6) "fourth"
[...
How do I provide custom cast support for my class?
...c# but note that from that example, using the explicit method, if you do:
string name = "Test";
Role role = (Role) name;
Then everything is fine; however, if you use:
object name = "Test";
Role role = (Role) name;
You will now get an InvalidCastException because string cannot be cast to Role, ...
C# DropDownList with a Dictionary as DataSource
...eField of DropDownList using "Key" and "Value" texts :
Dictionary<string, string> list = new Dictionary<string, string>();
list.Add("item 1", "Item 1");
list.Add("item 2", "Item 2");
list.Add("item 3", "Item 3");
list.Add("item 4", "Item 4");
ddl.DataSource = l...
Escape a string for a sed replace pattern
In my bash script I have an external (received from user) string, which I should use in sed pattern.
14 Answers
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