split an empty string gives an element

-1

why split on an empty string gives an element?

i.e. how to get 0 in the below case:

let tags = "";

let arr = tags.split(',');

console.log(arr.length);

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

asked Jan 2 at 11:27

qadenza

2,987103762

1

it's in the function specification to return an array with the whole string if the separator is not found. You can still try to find if it exists first with indexOf and split only if it is found

– Kaddath
Jan 2 at 11:30

You need to check for empty elements if you want to do that

– Just code
Jan 2 at 11:30

@Kaddah and what logic is behind? Why result is not an empty array?

– qadenza
Jan 2 at 11:33

Try console.log(arr); and then you know why. It returns 1, because of 0: "".

– Reza Saadati
Jan 2 at 11:35

1

sometimes precision in the terms, calling things by their names can make think that we are leaving common sense. But common sense is often generalisation. Think about what is really what. An empty string is not nothing. It's a string, it's actually something. And if you don't split a cake in 2, you still have a cake. A whole yummy cake for your own..

– Kaddath
Jan 2 at 12:35

|
show 13 more comments

-1

why split on an empty string gives an element?

i.e. how to get 0 in the below case:

let tags = "";

let arr = tags.split(',');

console.log(arr.length);

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

asked Jan 2 at 11:27

qadenza

2,987103762

1

it's in the function specification to return an array with the whole string if the separator is not found. You can still try to find if it exists first with indexOf and split only if it is found

– Kaddath
Jan 2 at 11:30

You need to check for empty elements if you want to do that

– Just code
Jan 2 at 11:30

@Kaddah and what logic is behind? Why result is not an empty array?

– qadenza
Jan 2 at 11:33

Try console.log(arr); and then you know why. It returns 1, because of 0: "".

– Reza Saadati
Jan 2 at 11:35

1

sometimes precision in the terms, calling things by their names can make think that we are leaving common sense. But common sense is often generalisation. Think about what is really what. An empty string is not nothing. It's a string, it's actually something. And if you don't split a cake in 2, you still have a cake. A whole yummy cake for your own..

– Kaddath
Jan 2 at 12:35

|
show 13 more comments

-1

why split on an empty string gives an element?

i.e. how to get 0 in the below case:

let tags = "";

let arr = tags.split(',');

console.log(arr.length);

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

asked Jan 2 at 11:27

qadenza

2,987103762

why split on an empty string gives an element?

i.e. how to get 0 in the below case:

let tags = "";

let arr = tags.split(',');

console.log(arr.length);

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

let tags = "";

let arr = tags.split(',');

console.log(arr.length);

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

let tags = "";

let arr = tags.split(',');

console.log(arr.length);

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

jquery split

asked Jan 2 at 11:27

qadenza

2,987103762

asked Jan 2 at 11:27

qadenza

2,987103762

asked Jan 2 at 11:27

qadenza

2,987103762

asked Jan 2 at 11:27

qadenza

2,987103762

asked Jan 2 at 11:27

qadenza

2,987103762

1

it's in the function specification to return an array with the whole string if the separator is not found. You can still try to find if it exists first with indexOf and split only if it is found

– Kaddath
Jan 2 at 11:30

You need to check for empty elements if you want to do that

– Just code
Jan 2 at 11:30

@Kaddah and what logic is behind? Why result is not an empty array?

– qadenza
Jan 2 at 11:33

Try console.log(arr); and then you know why. It returns 1, because of 0: "".

– Reza Saadati
Jan 2 at 11:35

1

sometimes precision in the terms, calling things by their names can make think that we are leaving common sense. But common sense is often generalisation. Think about what is really what. An empty string is not nothing. It's a string, it's actually something. And if you don't split a cake in 2, you still have a cake. A whole yummy cake for your own..

– Kaddath
Jan 2 at 12:35

|
show 13 more comments

1

it's in the function specification to return an array with the whole string if the separator is not found. You can still try to find if it exists first with indexOf and split only if it is found

– Kaddath
Jan 2 at 11:30

You need to check for empty elements if you want to do that

– Just code
Jan 2 at 11:30

@Kaddah and what logic is behind? Why result is not an empty array?

– qadenza
Jan 2 at 11:33

Try console.log(arr); and then you know why. It returns 1, because of 0: "".

– Reza Saadati
Jan 2 at 11:35

1

sometimes precision in the terms, calling things by their names can make think that we are leaving common sense. But common sense is often generalisation. Think about what is really what. An empty string is not nothing. It's a string, it's actually something. And if you don't split a cake in 2, you still have a cake. A whole yummy cake for your own..

– Kaddath
Jan 2 at 12:35

it's in the function specification to return an array with the whole string if the separator is not found. You can still try to find if it exists first with indexOf and split only if it is found

– Kaddath
Jan 2 at 11:30

You need to check for empty elements if you want to do that

– Just code
Jan 2 at 11:30

@Kaddah and what logic is behind? Why result is not an empty array?

– qadenza
Jan 2 at 11:33

Try console.log(arr); and then you know why. It returns 1, because of 0: "".

– Reza Saadati
Jan 2 at 11:35

sometimes precision in the terms, calling things by their names can make think that we are leaving common sense. But common sense is often generalisation. Think about what is really what. An empty string is not nothing. It's a string, it's actually something. And if you don't split a cake in 2, you still have a cake. A whole yummy cake for your own..

– Kaddath
Jan 2 at 12:35

|
show 13 more comments

3 Answers
3

active

oldest

votes

You can simply remove the empty string elements form arr using filter

let tags = "";

let arr = tags.split(',').filter(x => x);

console.log(arr.length);

answered Jan 2 at 11:44

Ahsan Ali

2,5401823

add a comment |

   let tags = "";

   let arr = tags.split(',').filter(x => x);

   console.log(arr.length);

   else 

   {



   var result=console.log(arr.length);

   }

edited Jan 2 at 11:46

answered Jan 2 at 11:41

joslin selva c

113

add a comment |

This is just the nature of the split function as per the ECMAScript specification. Here is the relevant excerpt from the spec:

If the this object is (or converts to) the empty String, the result
depends on whether separator can match the empty String. If it can,
the result array contains no elements. Otherwise, the result array
contains one element, which is the empty String.

A simple workaround for the behavior you're looking for would be something like:

let arr = !tags ?  : tags.split(',');

edited Jan 2 at 11:46

answered Jan 2 at 11:38

cody

8,23631226

add a comment |

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3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

You can simply remove the empty string elements form arr using filter

let tags = "";

let arr = tags.split(',').filter(x => x);

console.log(arr.length);

answered Jan 2 at 11:44

Ahsan Ali

2,5401823

add a comment |

You can simply remove the empty string elements form arr using filter

let tags = "";

let arr = tags.split(',').filter(x => x);

console.log(arr.length);

answered Jan 2 at 11:44

Ahsan Ali

2,5401823

add a comment |

You can simply remove the empty string elements form arr using filter

let tags = "";

let arr = tags.split(',').filter(x => x);

console.log(arr.length);

answered Jan 2 at 11:44

Ahsan Ali

2,5401823

You can simply remove the empty string elements form arr using filter

let tags = "";

let arr = tags.split(',').filter(x => x);

console.log(arr.length);

let tags = "";

let arr = tags.split(',').filter(x => x);

console.log(arr.length);

let tags = "";

let arr = tags.split(',').filter(x => x);

console.log(arr.length);

answered Jan 2 at 11:44

Ahsan Ali

2,5401823

answered Jan 2 at 11:44

Ahsan Ali

2,5401823

answered Jan 2 at 11:44

Ahsan Ali

2,5401823

answered Jan 2 at 11:44

Ahsan Ali

2,5401823

add a comment |

   let tags = "";

   let arr = tags.split(',').filter(x => x);

   console.log(arr.length);

   else 

   {



   var result=console.log(arr.length);

   }

edited Jan 2 at 11:46

answered Jan 2 at 11:41

joslin selva c

113

add a comment |

   let tags = "";

   let arr = tags.split(',').filter(x => x);

   console.log(arr.length);

   else 

   {



   var result=console.log(arr.length);

   }

edited Jan 2 at 11:46

answered Jan 2 at 11:41

joslin selva c

113

add a comment |

   let tags = "";

   let arr = tags.split(',').filter(x => x);

   console.log(arr.length);

   else 

   {



   var result=console.log(arr.length);

   }

edited Jan 2 at 11:46

answered Jan 2 at 11:41

joslin selva c

113

   let tags = "";

   let arr = tags.split(',').filter(x => x);

   console.log(arr.length);

   else 

   {



   var result=console.log(arr.length);

   }

edited Jan 2 at 11:46

answered Jan 2 at 11:41

joslin selva c

113

edited Jan 2 at 11:46

answered Jan 2 at 11:41

joslin selva c

113

answered Jan 2 at 11:41

joslin selva c

113

answered Jan 2 at 11:41

joslin selva c

113

add a comment |

This is just the nature of the split function as per the ECMAScript specification. Here is the relevant excerpt from the spec:

If the this object is (or converts to) the empty String, the result
depends on whether separator can match the empty String. If it can,
the result array contains no elements. Otherwise, the result array
contains one element, which is the empty String.

A simple workaround for the behavior you're looking for would be something like:

let arr = !tags ?  : tags.split(',');

edited Jan 2 at 11:46

answered Jan 2 at 11:38

cody

8,23631226

add a comment |

This is just the nature of the split function as per the ECMAScript specification. Here is the relevant excerpt from the spec:

If the this object is (or converts to) the empty String, the result
depends on whether separator can match the empty String. If it can,
the result array contains no elements. Otherwise, the result array
contains one element, which is the empty String.

A simple workaround for the behavior you're looking for would be something like:

let arr = !tags ?  : tags.split(',');

edited Jan 2 at 11:46

answered Jan 2 at 11:38

cody

8,23631226

add a comment |

This is just the nature of the split function as per the ECMAScript specification. Here is the relevant excerpt from the spec:

If the this object is (or converts to) the empty String, the result
depends on whether separator can match the empty String. If it can,
the result array contains no elements. Otherwise, the result array
contains one element, which is the empty String.

A simple workaround for the behavior you're looking for would be something like:

let arr = !tags ?  : tags.split(',');

edited Jan 2 at 11:46

answered Jan 2 at 11:38

cody

8,23631226

This is just the nature of the split function as per the ECMAScript specification. Here is the relevant excerpt from the spec:

If the this object is (or converts to) the empty String, the result
depends on whether separator can match the empty String. If it can,
the result array contains no elements. Otherwise, the result array
contains one element, which is the empty String.

A simple workaround for the behavior you're looking for would be something like:

let arr = !tags ?  : tags.split(',');

edited Jan 2 at 11:46

answered Jan 2 at 11:38

cody

8,23631226

edited Jan 2 at 11:46

answered Jan 2 at 11:38

cody

8,23631226

answered Jan 2 at 11:38

cody

8,23631226

answered Jan 2 at 11:38

cody

8,23631226

add a comment |

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