Have a look at the python documentation for filter(function, iterable) (from here): Construct an iterator from those elements of iterable for which function returns true. So in order to get a list back you have to use list class: shesaid = list(filter(greetings(), [“hello”, “goodbye”])) But this probably isn’t what you wanted, because it tries to … Read more
This is a new feature of JavaScript 1.7 called Destructuring assignment: Destructuring assignment makes it possible to extract data from arrays or objects using a syntax that mirrors the construction of array and object literals. The object and array literal expressions provide an easy way to create ad-hoc packages of data. Once you’ve created these … Read more
There is a great answer on the Struggling Through Problems Blog This is taken from there, with very minor modifications. USING THE FOLLOWING THREE FUNCTIONS (Plus one for allowing for lists of different sizes) # Generic form ‘%=%’ = function(l, r, …) UseMethod(‘%=%’) # Binary Operator ‘%=%.lbunch’ = function(l, r, …) { Envir = as.environment(-1) … Read more
Use the mapfile command: mapfile -t myArray < file.txt The error is using for — the idiomatic way to loop over lines of a file is: while IFS= read -r line; do echo “>>$line<<“; done < file.txt See BashFAQ/005 for more details.
You are not comparing for equality. You are assigning. Python allows you to assign to multiple targets: foo, bar = 1, 2 assigns the two values to foo and bar, respectively. All you need is a sequence or iterable on the right-hand side, and a list or tuple of names on the left. When you … Read more
Use: h.className = h.className + (h.className ? ‘ error’ : ‘error’) You want the operator to work for h.className. Better be specific about it. Of course, no harm should come from h.className += ‘ error’, but that’s another matter. Also, note that + has precedence over the ternary operator: JavaScript Operator Precedence
Try this: this.approved_by = IsNullOrEmpty(planRec.approved_by) ? “” : planRec.approved_by.toString(); You can also use the null-coalescing operator as other have said – since no one has given an example that works with your code here is one: this.approved_by = planRec.approved_by ?? planRec.approved_by.toString(); But this example only works since a possible value for this.approved_by is the same … Read more
From here: The operators <- and = assign into the environment in which they are evaluated. The operator <- can be used anywhere, whereas the operator = is only allowed at the top level (e.g., in the complete expression typed at the command prompt) or as one of the subexpressions in a braced list of … Read more
$var_a = $var_b = $same_var = $var_d = $some_var=”A”;
The assignment expression operator := added in Python 3.8 supports assignment inside of lambda expressions. This operator can only appear within a parenthesized (…), bracketed […], or braced {…} expression for syntactic reasons. For example, we will be able to write the following: import sys say_hello = lambda: ( message := “Hello world”, sys.stdout.write(message + … Read more