@stdlib/array/base/cuevery-by/README.md

Arrays.

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# cueveryBy

> Cumulatively test whether every array element in a provided array passes a test implemented by a predicate function.

<section class="usage">

## Usage

```javascript
var cueveryBy = require( '@stdlib/array/base/cuevery-by' );
```

#### cueveryBy( x, predicate\[, thisArg ] )

Cumulatively tests whether every array element in a provided array passes a test implemented by a predicate function.

```javascript
function fcn( value) {
    return ( value > 0 );
}

var x = [ 1, 1, 0, 0, 0 ];

var y = cueveryBy( x, fcn );
// returns [ true, true, false, false, false ]
```

The invoked `predicate` function is provided three arguments:

-   **value**: collection element.
-   **index**: collection index.
-   **collection**: input collection.

To set the function execution context, provide a `thisArg`.

```javascript
function fcn( v ) {
    this.count += 1;
    return ( v > 0 );
}

var x = [ 1, 1, 0, 0, 0 ];

var context = {
    'count': 0
};

var bool = cueveryBy( x, fcn, context );
// returns [ true, true, false, false, false ]

var count = context.count;
// returns 3
```

#### cueveryBy.assign( x, out, stride, offset, predicate\[, thisArg ] )

Cumulatively tests whether every array element in a provided array passes a test implemented by a predicate function and assigns the results to a provided output array.

```javascript
function fcn( v ) {
    return ( v > 0 );
}

var x = [ 1, 1, 0, 0, 0 ];
var y = [ false, null, false, null, false, null, false, null, false, null ];

var out = cueveryBy.assign( x, y, 2, 0, fcn );
// returns [ true, null, true, null, false, null, false, null, false, null ]

var bool = ( out === y );
// returns true
```

</section>

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<section class="notes">

</section>

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<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var bernoulli = require( '@stdlib/random/array/bernoulli' );
var cueveryBy = require( '@stdlib/array/base/cuevery-by' );

function fcn( value ) {
    return ( value > 0 );
}

// Create an array of random values:
var x = bernoulli( 10, 0.8 );
console.log( x );

// Cumulatively tests whether every array element passes a test:
var y = cueveryBy( x, fcn );
console.log( y );
```

</section>

<!-- /.examples -->

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<section class="related">

</section>

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