Reference Wrapper is a Dart package which simulates pass by reference feature using Wrapper class which holds the value.
Usage
Use this package if you are calling a function that needs to modify its arguments
There are two ways to read / write the value
var x = Ref<num?>(null);
var read1 = x.ref; // first way to read
var read2 = x(); // second way to read
x.ref = 10; // first way to write
x(10); // second way to write
Example
void twice(Ref<num> x, Ref<num> y) {
x.ref *= 2;
y.ref *= 2;
}
void test() {
var x = Ref<num>(5);
var y = Ref<num>(7);
twice(x, y);
print(x.ref); // 10
print(y.ref); // 14
}
Advanced Example
void twice(Ref<num> x, Ref<num> y) {
x(x() * 2);
y(y() * 2);
}
void test() {
var x = Ref<num>(5);
var y = Ref<num>(7);
twice(x, y);
print(x()); // 10
print(y()); // 14
}
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