It’s because you used Function instead of Sub. Since a Function returns a value, the compiler considers that the equals sign (=) is used as a comparison, not an assignment. If you change Function to Sub, the compiler would correctly consider the equals sign as an assignment: TempList.ForEach(Sub(obj) obj.Deleted = True) If you had a … Read more
In Lodash, on the other hand, returning false tells _.forEach() that this iteration will be the last. Is there a way to make the “continue” behavior also functional in Lodash? You could return true, or just a single return (which returns undefined), this value is different from needed false for “exit iteration early by explicitly … Read more
The answer the majority of the time is it does not matter. The number of items in the loop (even what one might consider a “large” number of items, say in the thousands) isn’t going to have an impact on the code. Of course, if you identify this as a bottleneck in your situation, by … Read more
The function’s only called once, to return an IEnumerator<T>; after that, the MoveNext() method and the Current property are used to iterate through the results: foreach (Foo f in GetFoos()) { // Do stuff } is somewhat equivalent to: using (IEnumerator<Foo> iterator = GetFoos().GetEnumerator()) { while (iterator.MoveNext()) { Foo f = iterator.Current; // Do stuff … Read more
If we overloaded std::begin() and std::end() for const char arrays to return one less than the size of the array, then the following code would output 4 instead of the expected 5: #include <iostream> int main() { const char s[5] = {‘h’, ‘e’, ‘l’, ‘l’, ‘o’}; int i = 0; for (auto e : s) … Read more
This will work: for (String crt : new String[]{“a”,”b”,”c”} ) { doSomething(); }
You can’t really. That’s kind of the point of range-for, is that you don’t need iterators. But you can just change your logic on how you print your comma to print it if it’s not first: bool first = true; for (auto& elem : item_vector) { if (!first) printf(“, “); // print elem first = … Read more
Enhanced for loop: for (String element : array) { // rest of code handling current element } Traditional for loop equivalent: for (int i=0; i < array.length; i++) { String element = array[i]; // rest of code handling current element } Take a look at these forums: https://blogs.oracle.com/CoreJavaTechTips/entry/using_enhanced_for_loops_with http://www.java-tips.org/java-se-tips/java.lang/the-enhanced-for-loop.html