In LUA get a list of random numbers between a range, but allow x set of duplicates per number

There is a ton of examples of generating random numbers in LUA that have no duplicates, and just a standard math.random(x,y) can get a set of random whole numbers in a range....

... but I am having trouble finding a set of random numbers between a range, but allowing x amount of duplicates. For my immediate needs I can allow 1 set of duplicates, but it would be great to have code where you can set "duplicate value" to anything for future projects.

Example : I want to generate a list of 10 whole numbers between 1-10... each value can be anything between 1-10, but any one number can only be generated and added to the list twice.

Example Result: 1,1,2,4,5,5,7,7,8,9

In this example result math.random() tried to spit out 3 or more of the same number, but the code makes it go back and try again if it has already produced 2 of the same number.

Thanks in advance!

edited Nov 20 '18 at 4:30

asked Nov 20 '18 at 4:23

aJynks

3001619

add a comment |

There is a ton of examples of generating random numbers in LUA that have no duplicates, and just a standard math.random(x,y) can get a set of random whole numbers in a range....

Example : I want to generate a list of 10 whole numbers between 1-10... each value can be anything between 1-10, but any one number can only be generated and added to the list twice.

Example Result: 1,1,2,4,5,5,7,7,8,9

In this example result math.random() tried to spit out 3 or more of the same number, but the code makes it go back and try again if it has already produced 2 of the same number.

Thanks in advance!

edited Nov 20 '18 at 4:30

asked Nov 20 '18 at 4:23

aJynks

3001619

add a comment |

There is a ton of examples of generating random numbers in LUA that have no duplicates, and just a standard math.random(x,y) can get a set of random whole numbers in a range....

Example : I want to generate a list of 10 whole numbers between 1-10... each value can be anything between 1-10, but any one number can only be generated and added to the list twice.

Example Result: 1,1,2,4,5,5,7,7,8,9

In this example result math.random() tried to spit out 3 or more of the same number, but the code makes it go back and try again if it has already produced 2 of the same number.

Thanks in advance!

edited Nov 20 '18 at 4:30

asked Nov 20 '18 at 4:23

aJynks

3001619

There is a ton of examples of generating random numbers in LUA that have no duplicates, and just a standard math.random(x,y) can get a set of random whole numbers in a range....

Example : I want to generate a list of 10 whole numbers between 1-10... each value can be anything between 1-10, but any one number can only be generated and added to the list twice.

Example Result: 1,1,2,4,5,5,7,7,8,9

In this example result math.random() tried to spit out 3 or more of the same number, but the code makes it go back and try again if it has already produced 2 of the same number.

Thanks in advance!

lua

edited Nov 20 '18 at 4:30

asked Nov 20 '18 at 4:23

aJynks

3001619

edited Nov 20 '18 at 4:30

asked Nov 20 '18 at 4:23

aJynks

3001619

edited Nov 20 '18 at 4:30

asked Nov 20 '18 at 4:23

aJynks

3001619

asked Nov 20 '18 at 4:23

aJynks

3001619

asked Nov 20 '18 at 4:23

aJynks

3001619

add a comment |

2 Answers
2

active

oldest

votes

You can use "merge trick":

Create "unical" array of numbers for 5 (10/number of dublicats) elements: 1,2,5,7,9

Repeate #1

Merge arrays.

You can generalize it with paramers of minValue, maxValue, totalNumber, numberOfDublicates, but will need to little more code for handling 10/3 problems and maxValue < totalNumber.

answered Nov 20 '18 at 6:46

A. Denis

32012

add a comment |

Generate a sequential list of non-random numbers between a range with
no duplicates.

Add them to a table, but add each number X amount of times, where X
is the total amount of duplicates allowed. So we know have a table x
times as long with each individual number listed X amount of times.

Shuffle the table, or generate a list of random numbers or both.

Then simply extract the numbers from the table using the generated
numbers as the numeric key value for the "duplicate" table.

You can store anything at those key values so this works for
anything.. not just numbers.

answered Nov 20 '18 at 21:40

aJynks

3001619

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

You can use "merge trick":

Create "unical" array of numbers for 5 (10/number of dublicats) elements: 1,2,5,7,9

Repeate #1

Merge arrays.

You can generalize it with paramers of minValue, maxValue, totalNumber, numberOfDublicates, but will need to little more code for handling 10/3 problems and maxValue < totalNumber.

answered Nov 20 '18 at 6:46

A. Denis

32012

add a comment |

You can use "merge trick":

Create "unical" array of numbers for 5 (10/number of dublicats) elements: 1,2,5,7,9

Repeate #1

Merge arrays.

You can generalize it with paramers of minValue, maxValue, totalNumber, numberOfDublicates, but will need to little more code for handling 10/3 problems and maxValue < totalNumber.

answered Nov 20 '18 at 6:46

A. Denis

32012

add a comment |

You can use "merge trick":

Create "unical" array of numbers for 5 (10/number of dublicats) elements: 1,2,5,7,9

Repeate #1

Merge arrays.

You can generalize it with paramers of minValue, maxValue, totalNumber, numberOfDublicates, but will need to little more code for handling 10/3 problems and maxValue < totalNumber.

answered Nov 20 '18 at 6:46

A. Denis

32012

You can use "merge trick":

Create "unical" array of numbers for 5 (10/number of dublicats) elements: 1,2,5,7,9

Repeate #1

Merge arrays.

You can generalize it with paramers of minValue, maxValue, totalNumber, numberOfDublicates, but will need to little more code for handling 10/3 problems and maxValue < totalNumber.

answered Nov 20 '18 at 6:46

A. Denis

32012

answered Nov 20 '18 at 6:46

A. Denis

32012

answered Nov 20 '18 at 6:46

A. Denis

32012

answered Nov 20 '18 at 6:46

A. Denis

32012

add a comment |

Generate a sequential list of non-random numbers between a range with
no duplicates.

Add them to a table, but add each number X amount of times, where X
is the total amount of duplicates allowed. So we know have a table x
times as long with each individual number listed X amount of times.

Shuffle the table, or generate a list of random numbers or both.

Then simply extract the numbers from the table using the generated
numbers as the numeric key value for the "duplicate" table.

You can store anything at those key values so this works for
anything.. not just numbers.

answered Nov 20 '18 at 21:40

aJynks

3001619

add a comment |

Generate a sequential list of non-random numbers between a range with
no duplicates.

Add them to a table, but add each number X amount of times, where X
is the total amount of duplicates allowed. So we know have a table x
times as long with each individual number listed X amount of times.

Shuffle the table, or generate a list of random numbers or both.

Then simply extract the numbers from the table using the generated
numbers as the numeric key value for the "duplicate" table.

You can store anything at those key values so this works for
anything.. not just numbers.

answered Nov 20 '18 at 21:40

aJynks

3001619

add a comment |

Generate a sequential list of non-random numbers between a range with
no duplicates.

Add them to a table, but add each number X amount of times, where X
is the total amount of duplicates allowed. So we know have a table x
times as long with each individual number listed X amount of times.

Shuffle the table, or generate a list of random numbers or both.

Then simply extract the numbers from the table using the generated
numbers as the numeric key value for the "duplicate" table.

You can store anything at those key values so this works for
anything.. not just numbers.

answered Nov 20 '18 at 21:40

aJynks

3001619

Generate a sequential list of non-random numbers between a range with
no duplicates.

Add them to a table, but add each number X amount of times, where X
is the total amount of duplicates allowed. So we know have a table x
times as long with each individual number listed X amount of times.

Shuffle the table, or generate a list of random numbers or both.

Then simply extract the numbers from the table using the generated
numbers as the numeric key value for the "duplicate" table.

You can store anything at those key values so this works for
anything.. not just numbers.

answered Nov 20 '18 at 21:40

aJynks

3001619

answered Nov 20 '18 at 21:40

aJynks

3001619

answered Nov 20 '18 at 21:40

aJynks

3001619

answered Nov 20 '18 at 21:40

aJynks

3001619

add a comment |

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