LINQ equivalent of foreach for IEnumerable
There is no ForEach extension for IEnumerable; only for List<T>. So you could do Alternatively, write your own ForEach extension method:
foreach
LINQ equivalent of foreach for IEnumerable
Short circuit Array.forEach like calling break
There’s no built-in ability to break in forEach. To interrupt execution you would have to throw an exception of some sort. eg. Run code snippetExpand snippet JavaScript exceptions aren’t terribly pretty. A traditional for loop might be more appropriate if you really need to break inside it. Use Array#some Instead, use Array#some: Run code snippetExpand snippet This works because some returns true as soon as any of the … Read more
Form submission: PHP S_SESSION statements within a foreach loop
Let’s suppose I have the following PHP code which attempts to read from an array called $arr which takes on the values {fullname, studentnumber, email}. Upon submission of my HTML form, this PHP code will execute the foreach loop, and store the values posted to the page in the $_SESSION array. The above code doesn’t work as intended. If I … Read more
Is there a ‘foreach’ function in Python 3?
Every occurence of “foreach” I’ve seen (PHP, C#, …) does basically the same as pythons “for” statement. These are more or less equivalent: So, yes, there is a “foreach” in python. It’s called “for”. What you’re describing is an “array map” function. This could be done with list comprehensions in python:
Python foreach equivalent
Sure. A for loop.
Python foreach equivalent
Sure. A for loop.
How to avoid java.util.ConcurrentModificationException when iterating through and removing elements from an ArrayList
Two options: Create a list of values you wish to remove, adding to that list within the loop, then call originalList.removeAll(valuesToRemove) at the end Use the remove() method on the iterator itself. Note that this means you can’t use the enhanced for loop. As an example of the second option, removing any strings with a … Read more
How does the Java ‘for each’ loop work?
Note that if you need to use i.remove(); in your loop, or access the actual iterator in some way, you cannot use the for ( : ) idiom, since the actual iterator is merely inferred. As was noted by Denis Bueno, this code works for any object that implements the Iterable interface. Note that if … Read more
Difference between “as $key => $value” and “as $value” in PHP foreach
Well, the $key => $value in the foreach loop refers to the key-value pairs in associative arrays, where the key serves as the index to determine the value instead of a number like 0,1,2,… In PHP, associative arrays look like this: In the PHP code: $featured is the associative array being looped through, and as … Read more
How does the Java ‘for each’ loop work?
Note that if you need to use i.remove(); in your loop, or access the actual iterator in some way, you cannot use the for ( : ) idiom, since the actual iterator is merely inferred. As was noted by Denis Bueno, this code works for any object that implements the Iterable interface. Note that if … Read more