How to split and keep numbers together

I am programming a math expression checker. I have this string:

Oper = "((234+332)+(cos4-sin65))"

I want to split this string by separating all "()"s and operators minus numbers or trigonometric ratios to get this result:

Oper = ['(', '(', '234', '+', '332', ')', '+', '(', 'cos4', '-', 'sin65', ')', ')']

How would the split be?

edited Nov 22 '18 at 5:11

sawa

131k29205303

asked Nov 21 '18 at 22:35

Alejandro Rodriguez

1

what is the logic of this split?

– Lenin Raj Rajasekaran
Nov 21 '18 at 22:37

The program is about math expressions checker and the idea is separate all the "()" and operators minus the numbers or trigonometric ratios

– Alejandro Rodriguez
Nov 21 '18 at 22:42

1

What's the logic of an input such as cos4 or sin65? You seem to be treating them as labels or variable names. How would one know that's not supposed to be evaluating cosine(4) and sine(65)?

– pjs
Nov 21 '18 at 23:06

It is a bad idea to use constant for something like that.

– sawa
Nov 22 '18 at 5:07

add a comment |

I am programming a math expression checker. I have this string:

Oper = "((234+332)+(cos4-sin65))"

I want to split this string by separating all "()"s and operators minus numbers or trigonometric ratios to get this result:

Oper = ['(', '(', '234', '+', '332', ')', '+', '(', 'cos4', '-', 'sin65', ')', ')']

How would the split be?

edited Nov 22 '18 at 5:11

sawa

131k29205303

asked Nov 21 '18 at 22:35

Alejandro Rodriguez

1

what is the logic of this split?

– Lenin Raj Rajasekaran
Nov 21 '18 at 22:37

The program is about math expressions checker and the idea is separate all the "()" and operators minus the numbers or trigonometric ratios

– Alejandro Rodriguez
Nov 21 '18 at 22:42

1

What's the logic of an input such as cos4 or sin65? You seem to be treating them as labels or variable names. How would one know that's not supposed to be evaluating cosine(4) and sine(65)?

– pjs
Nov 21 '18 at 23:06

It is a bad idea to use constant for something like that.

– sawa
Nov 22 '18 at 5:07

add a comment |

I am programming a math expression checker. I have this string:

Oper = "((234+332)+(cos4-sin65))"

I want to split this string by separating all "()"s and operators minus numbers or trigonometric ratios to get this result:

Oper = ['(', '(', '234', '+', '332', ')', '+', '(', 'cos4', '-', 'sin65', ')', ')']

How would the split be?

edited Nov 22 '18 at 5:11

sawa

131k29205303

asked Nov 21 '18 at 22:35

Alejandro Rodriguez

I am programming a math expression checker. I have this string:

Oper = "((234+332)+(cos4-sin65))"

I want to split this string by separating all "()"s and operators minus numbers or trigonometric ratios to get this result:

Oper = ['(', '(', '234', '+', '332', ')', '+', '(', 'cos4', '-', 'sin65', ')', ')']

How would the split be?

ruby string

edited Nov 22 '18 at 5:11

sawa

131k29205303

asked Nov 21 '18 at 22:35

Alejandro Rodriguez

edited Nov 22 '18 at 5:11

sawa

131k29205303

asked Nov 21 '18 at 22:35

Alejandro Rodriguez

edited Nov 22 '18 at 5:11

sawa

131k29205303

edited Nov 22 '18 at 5:11

sawa

131k29205303

edited Nov 22 '18 at 5:11

sawa

131k29205303

asked Nov 21 '18 at 22:35

Alejandro Rodriguez

asked Nov 21 '18 at 22:35

Alejandro Rodriguez

asked Nov 21 '18 at 22:35

Alejandro Rodriguez

1

what is the logic of this split?

– Lenin Raj Rajasekaran
Nov 21 '18 at 22:37

The program is about math expressions checker and the idea is separate all the "()" and operators minus the numbers or trigonometric ratios

– Alejandro Rodriguez
Nov 21 '18 at 22:42

1

What's the logic of an input such as cos4 or sin65? You seem to be treating them as labels or variable names. How would one know that's not supposed to be evaluating cosine(4) and sine(65)?

– pjs
Nov 21 '18 at 23:06

It is a bad idea to use constant for something like that.

– sawa
Nov 22 '18 at 5:07

add a comment |

1

what is the logic of this split?

– Lenin Raj Rajasekaran
Nov 21 '18 at 22:37

The program is about math expressions checker and the idea is separate all the "()" and operators minus the numbers or trigonometric ratios

– Alejandro Rodriguez
Nov 21 '18 at 22:42

1

What's the logic of an input such as cos4 or sin65? You seem to be treating them as labels or variable names. How would one know that's not supposed to be evaluating cosine(4) and sine(65)?

– pjs
Nov 21 '18 at 23:06

It is a bad idea to use constant for something like that.

– sawa
Nov 22 '18 at 5:07

what is the logic of this split?

– Lenin Raj Rajasekaran
Nov 21 '18 at 22:37

The program is about math expressions checker and the idea is separate all the "()" and operators minus the numbers or trigonometric ratios

– Alejandro Rodriguez
Nov 21 '18 at 22:42

What's the logic of an input such as cos4 or sin65? You seem to be treating them as labels or variable names. How would one know that's not supposed to be evaluating cosine(4) and sine(65)?

– pjs
Nov 21 '18 at 23:06

It is a bad idea to use constant for something like that.

– sawa
Nov 22 '18 at 5:07

add a comment |

2 Answers
2

active

oldest

votes

"((234+332)+(cos4-sin65))".split /([[:alpha:]]*d+)*/

# => ["(", "(", "234", "+", "332", ")", "+", "(", "cos4", "-", "sin65", ")", ")"]

Splits the whole string by nothing or optional alphanumeric + digits.

answered Nov 21 '18 at 22:50

Marcin Kołodziej

4,4901315

Thanks, is what I needed

– Alejandro Rodriguez
Nov 21 '18 at 22:53

add a comment |

oper = "((234+332)+(cos4-sin65))"



oper.scan /[^[:alnum:]]|[[:alnum:]]+/

  #=> ["(", "(", "234", "+", "332", ")", "+", "(", "cos4", "-", "sin65", ")", ")"]

Scan for one non-alphanumeric character or one or more alphanumeric characters.

answered Nov 21 '18 at 23:10

Cary Swoveland

69.8k54166

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

"((234+332)+(cos4-sin65))".split /([[:alpha:]]*d+)*/

# => ["(", "(", "234", "+", "332", ")", "+", "(", "cos4", "-", "sin65", ")", ")"]

Splits the whole string by nothing or optional alphanumeric + digits.

answered Nov 21 '18 at 22:50

Marcin Kołodziej

4,4901315

Thanks, is what I needed

– Alejandro Rodriguez
Nov 21 '18 at 22:53

add a comment |

"((234+332)+(cos4-sin65))".split /([[:alpha:]]*d+)*/

# => ["(", "(", "234", "+", "332", ")", "+", "(", "cos4", "-", "sin65", ")", ")"]

Splits the whole string by nothing or optional alphanumeric + digits.

answered Nov 21 '18 at 22:50

Marcin Kołodziej

4,4901315

Thanks, is what I needed

– Alejandro Rodriguez
Nov 21 '18 at 22:53

add a comment |

"((234+332)+(cos4-sin65))".split /([[:alpha:]]*d+)*/

# => ["(", "(", "234", "+", "332", ")", "+", "(", "cos4", "-", "sin65", ")", ")"]

Splits the whole string by nothing or optional alphanumeric + digits.

answered Nov 21 '18 at 22:50

Marcin Kołodziej

4,4901315

"((234+332)+(cos4-sin65))".split /([[:alpha:]]*d+)*/

# => ["(", "(", "234", "+", "332", ")", "+", "(", "cos4", "-", "sin65", ")", ")"]

Splits the whole string by nothing or optional alphanumeric + digits.

answered Nov 21 '18 at 22:50

Marcin Kołodziej

4,4901315

answered Nov 21 '18 at 22:50

Marcin Kołodziej

4,4901315

answered Nov 21 '18 at 22:50

Marcin Kołodziej

4,4901315

answered Nov 21 '18 at 22:50

Marcin Kołodziej

4,4901315

Thanks, is what I needed

– Alejandro Rodriguez
Nov 21 '18 at 22:53

add a comment |

Thanks, is what I needed

– Alejandro Rodriguez
Nov 21 '18 at 22:53

Thanks, is what I needed

– Alejandro Rodriguez
Nov 21 '18 at 22:53

add a comment |

oper = "((234+332)+(cos4-sin65))"



oper.scan /[^[:alnum:]]|[[:alnum:]]+/

  #=> ["(", "(", "234", "+", "332", ")", "+", "(", "cos4", "-", "sin65", ")", ")"]

Scan for one non-alphanumeric character or one or more alphanumeric characters.

answered Nov 21 '18 at 23:10

Cary Swoveland

69.8k54166

add a comment |

oper = "((234+332)+(cos4-sin65))"



oper.scan /[^[:alnum:]]|[[:alnum:]]+/

  #=> ["(", "(", "234", "+", "332", ")", "+", "(", "cos4", "-", "sin65", ")", ")"]

Scan for one non-alphanumeric character or one or more alphanumeric characters.

answered Nov 21 '18 at 23:10

Cary Swoveland

69.8k54166

add a comment |

oper = "((234+332)+(cos4-sin65))"



oper.scan /[^[:alnum:]]|[[:alnum:]]+/

  #=> ["(", "(", "234", "+", "332", ")", "+", "(", "cos4", "-", "sin65", ")", ")"]

Scan for one non-alphanumeric character or one or more alphanumeric characters.

answered Nov 21 '18 at 23:10

Cary Swoveland

69.8k54166

oper = "((234+332)+(cos4-sin65))"



oper.scan /[^[:alnum:]]|[[:alnum:]]+/

  #=> ["(", "(", "234", "+", "332", ")", "+", "(", "cos4", "-", "sin65", ")", ")"]

Scan for one non-alphanumeric character or one or more alphanumeric characters.

answered Nov 21 '18 at 23:10

Cary Swoveland

69.8k54166

answered Nov 21 '18 at 23:10

Cary Swoveland

69.8k54166

answered Nov 21 '18 at 23:10

Cary Swoveland

69.8k54166

answered Nov 21 '18 at 23:10

Cary Swoveland

69.8k54166

add a comment |

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