Supply mandatory argument along with varying arguments to the function

Question

Supply mandatory argument along with varying arguments to the function

I have a function that requires one parameter and a dynamic set of additional parameters. I am passing an array of blobs to the function. Below is a simplified version of the function:

function test(directory, blob0, blob1) {
  for (var argumentIndex = 1; argumentIndex < arguments.length; argumentIndex++) {
    var bytes = arguments[argumentIndex].getBytes();
    //perform some operations
  }
}

Since I am using the rhino runtime, I cannot take advantage of the spread operator. The closest solution I have found is to use the apply function, but I am unsure how to include the required parameter (directory) along with the blob parameters in the test function above.

var blobs = [];
blobs[0] = getBlob();
blobs[1] = getBlob();
blobs[2] = getBlob();  

test.apply(null,blobs)  //required parameter (directory) is not being set

javascript google-apps-script

Answer 1

Answer №1

Utilize an array of blobs to represent the expanded values of blob0, blob1, blob2 within the function
```
test(directory, blob0, blob1, blob2)
```
.
Include the parameter directory in the function
```
test(directory, blob0, blob1, blob2)
```
by adding it explicitly.

If my interpretation is accurate, consider the following solution as one of many potential options:

This approach employs the usage of bind.

Modified script:

// A sample getBlob() function which returns a blob.
function getBlob() {return Utilities.newBlob("sample", MimeType.PLAIN_TEXT)}

function test(directory, blob0, blob1, blob2) {
  Logger.log("%s, %s, %s, %s", directory, blob0, blob1, blob2) // <--- directory, Blob, Blob, Blob

  for (var argumentIndex = 1; argumentIndex < arguments.length; argumentIndex++) {
    var bytes = arguments[argumentIndex].getBytes();
    // Perform certain actions
  }
}

// Execute this function.
function myFunction() {
  var directory = "directory";

  var blobs = [];
  blobs[0] = getBlob();
  blobs[1] = getBlob();
  blobs[2] = getBlob();

  test.bind(this, directory).apply(null, blobs);
}

In this revised script, directory is incorporated through the use of bind.
Upon running myFunction(), you will observe directory, Blob, Blob, Blob being logged at
```
Logger.log("%s, %s, %s, %s", directory, blob0, blob1, blob2)
```
within the
```
test(directory, blob0, blob1, blob2)
```
function.

References:

Function.prototype.bind()
Is JavaScript function.bind() supported in google sheets?
- I believe this thread could be beneficial for your query.

If I have misunderstood your inquiry and deviated from your desired course of action, please accept my apologies.

Answer 2

Utilize an array of blobs to represent the expanded values of blob0, blob1, blob2 within the function
```
test(directory, blob0, blob1, blob2)
```
.
Include the parameter directory in the function
```
test(directory, blob0, blob1, blob2)
```
by adding it explicitly.

If my interpretation is accurate, consider the following solution as one of many potential options:

This approach employs the usage of bind.

Modified script:

// A sample getBlob() function which returns a blob.
function getBlob() {return Utilities.newBlob("sample", MimeType.PLAIN_TEXT)}

function test(directory, blob0, blob1, blob2) {
  Logger.log("%s, %s, %s, %s", directory, blob0, blob1, blob2) // <--- directory, Blob, Blob, Blob

  for (var argumentIndex = 1; argumentIndex < arguments.length; argumentIndex++) {
    var bytes = arguments[argumentIndex].getBytes();
    // Perform certain actions
  }
}

// Execute this function.
function myFunction() {
  var directory = "directory";

  var blobs = [];
  blobs[0] = getBlob();
  blobs[1] = getBlob();
  blobs[2] = getBlob();

  test.bind(this, directory).apply(null, blobs);
}

In this revised script, directory is incorporated through the use of bind.
Upon running myFunction(), you will observe directory, Blob, Blob, Blob being logged at
```
Logger.log("%s, %s, %s, %s", directory, blob0, blob1, blob2)
```
within the
```
test(directory, blob0, blob1, blob2)
```
function.

References:

Function.prototype.bind()
Is JavaScript function.bind() supported in google sheets?
- I believe this thread could be beneficial for your query.

If I have misunderstood your inquiry and deviated from your desired course of action, please accept my apologies.

Answer 3

Answer №2

To insert an element at the beginning of an array, you can use the `unshift()` function.

var blobs = [];
blobs[0] = getBlob();
blobs[1] = getBlob();
blobs[2] = getBlob();

blobs.unshift(directory)

test.apply(null,blobs)

Answer 4

To insert an element at the beginning of an array, you can use the `unshift()` function.

var blobs = [];
blobs[0] = getBlob();
blobs[1] = getBlob();
blobs[2] = getBlob();

blobs.unshift(directory)

test.apply(null,blobs)

Supply mandatory argument along with varying arguments to the function

Answer №1

Modified script:

References:

Answer №2

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