Identifier expected error with multi line string

Question

I'm working with node , trying to build jupyter notebooks programatically. I'm trying to create a function that will build a notebook 'code' type cell. After working in the repl I have:

function codeCell(arr =>  
  `{
  cell_type: 'code',
  execution_count: null,
  metadata: { tags: [] },
  outputs: [],
  source: [${arr}]
}`
);

As you can see in the screenshot I'm getting an identifier expected error. What am I doing wrong?

It looks like your IDE doesn't recognize ES6 features like arrow functions and template literals. Make sure you've configured the proper JavaScript version. — Barmar
– Barmar, Commented Mar 31, 2022 at 18:01
@Barmar , Thank you. I'm using vscdode and made some changes following code.visualstudio.com/docs/nodejs/… — user1592380
– user1592380, Commented Mar 31, 2022 at 18:57

juzraai · Accepted Answer · 2022-03-31 18:22:32Z

3

function codeCell(arr =>

You started defining an arrow function inside the argument list of a function definition, which is invalid syntax.

Either write

function codeCell(arr) {
  return `{
    cell_type: 'code',
    execution_count: null,
    metadata: { tags: [] },
    outputs: [],
    source: [${arr}]
  }`;
}

Or if you want to use the arrow function syntax:

const codeCell = (arr) => `{
  cell_type: 'code',
  execution_count: null,
  metadata: { tags: [] },
  outputs: [],
  source: [${arr}]
}`;

answered Mar 31, 2022 at 18:22

juzraai

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