Revisions to Calculate different speeds between min and max speed with a stepsize

Added disclaimer about negative step sizes

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edited Jul 19, 2018 at 21:26

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As of Java-9, there exists IntStream.html#iterate(seed, hasNext, next)

If you are trying to get a comma separated list of speeds, use:

String allSpeeds = IntStream.iterate(minKmh, i -> i <= maxKmh, i -> i + step)
                            .mapToObj(Integer::toString)
                            .collect( Collectors.joining( "," ) );

If you just want the integer array of speeds:

int[] speeds = IntStream.iterate(minKmh, i -> i <= maxKmh, i -> i + step).toArray();

Or, if you want the array of speeds as Strings:

String[] allSpeedsAsArray = IntStream.iterate(minKmh, i -> i <= maxKmh, i -> i + step)
                                     .mapToObj(Integer::toString)
                                     .toArray();

Finally, improving @bowman's solution, slightly:

int[] speeds = IntStream.iterate(minKmh, i -> i <= maxKmh, i -> i + step).toArray();

Although, the above solutions require step > 0 or they may not terminate, where as Bowman's solution works fine with negative step sizes.

As of Java-9, there exists IntStream.html#iterate(seed, hasNext, next)

If you are trying to get a comma separated list of speeds, use:

String allSpeeds = IntStream.iterate(minKmh, i -> i <= maxKmh, i -> i + step)
                            .mapToObj(Integer::toString)
                            .collect( Collectors.joining( "," ) );

If you just want the integer array of speeds:

int[] speeds = IntStream.iterate(minKmh, i -> i <= maxKmh, i -> i + step).toArray();

Or, if you want the array of speeds as Strings:

String[] allSpeedsAsArray = IntStream.iterate(minKmh, i -> i <= maxKmh, i -> i + step)
                                     .mapToObj(Integer::toString)
                                     .toArray();

As of Java-9, there exists IntStream.html#iterate(seed, hasNext, next)

If you are trying to get a comma separated list of speeds, use:

String allSpeeds = IntStream.iterate(minKmh, i -> i <= maxKmh, i -> i + step)
                            .mapToObj(Integer::toString)
                            .collect( Collectors.joining( "," ) );

Or, if you want the array of speeds as Strings:

String[] allSpeedsAsArray = IntStream.iterate(minKmh, i -> i <= maxKmh, i -> i + step)
                                     .mapToObj(Integer::toString)
                                     .toArray();

Finally, improving @bowman's solution, slightly:

int[] speeds = IntStream.iterate(minKmh, i -> i <= maxKmh, i -> i + step).toArray();

Although, the above solutions require step > 0 or they may not terminate, where as Bowman's solution works fine with negative step sizes.

Now with variable names from question text

Source Link

edited Jul 19, 2018 at 20:15

AJNeufeld

34k
5
39
101

As of Java-9, there exists IntStream.html#iterate(seed, hasNext, next)

If you are trying to get a comma separated list of speeds, use:

String speedsallSpeeds = IntStream.iterate(lowerminKmh, i -> i <= uppermaxKmh, i -> i + step)
                            .mapToObj(Integer::toString)
                            .collect( Collectors.joining( "," ) );

If you just want the integer array of speeds:

int[] speeds = IntStream.iterate(lowerminKmh, i -> i <= uppermaxKmh, i -> i + step).toArray();

Or, if you want the array of speeds as Strings:

String[] allSpeedsAsArray = IntStream.iterate(lowerminKmh, i -> i <= uppermaxKmh, i -> i + step)
                                     .mapToObj(Integer::toString)
                                     .toArray();

As of Java-9, there exists IntStream.html#iterate(seed, hasNext, next)

If you are trying to get a comma separated list of speeds, use:

String speeds = IntStream.iterate(lower, i -> i <= upper, i -> i + step)
                         .mapToObj(Integer::toString)
                         .collect( Collectors.joining( "," ) );

If you just want the integer array of speeds:

int[] speeds = IntStream.iterate(lower, i -> i <= upper, i -> i + step).toArray();

Or, if you want the array of speeds as Strings:

String[] allSpeedsAsArray = IntStream.iterate(lower, i -> i <= upper, i -> i + step)
                                     .mapToObj(Integer::toString)
                                     .toArray();

As of Java-9, there exists IntStream.html#iterate(seed, hasNext, next)

If you are trying to get a comma separated list of speeds, use:

String allSpeeds = IntStream.iterate(minKmh, i -> i <= maxKmh, i -> i + step)
                            .mapToObj(Integer::toString)
                            .collect( Collectors.joining( "," ) );

If you just want the integer array of speeds:

int[] speeds = IntStream.iterate(minKmh, i -> i <= maxKmh, i -> i + step).toArray();

Or, if you want the array of speeds as Strings:

String[] allSpeedsAsArray = IntStream.iterate(minKmh, i -> i <= maxKmh, i -> i + step)
                                     .mapToObj(Integer::toString)
                                     .toArray();

Included `String[]` as possible result option.

Source Link

edited Jul 19, 2018 at 20:03

AJNeufeld

34k
5
39
101

As of Java-9, there exists IntStream.html#iterate(seed, hasNext, next)

If you are trying to get a comma separated list of speeds, use:

String speeds = IntStream.iterate(lower, i -> i <= upper, i -> i + step)
                         .mapToObj(Integer::toString)
                         .collect( Collectors.joining( "," ) );

If you just want the integer array of speeds:

int[] speeds = IntStream.iterate(lower, i -> i <= upper, i -> i+stepi + step).toArray();

Or, if you want the array of speeds as Strings:

String[] allSpeedsAsArray = IntStream.iterate(lower, i -> i <= upper, i -> i + step)
                                     .mapToObj(Integer::toString)
                                     .toArray();

As of Java-9, there exists IntStream.html#iterate(seed, hasNext, next)

If you are trying to get a comma separated list of speeds, use:

String speeds = IntStream.iterate(lower, i -> i <= upper, i -> i + step)
                         .mapToObj(Integer::toString)
                         .collect( Collectors.joining( "," ) );

If you just want the integer array of speeds:

int[] speeds = IntStream.iterate(lower, i -> i <= upper, i -> i+step).toArray();

As of Java-9, there exists IntStream.html#iterate(seed, hasNext, next)

If you are trying to get a comma separated list of speeds, use:

String speeds = IntStream.iterate(lower, i -> i <= upper, i -> i + step)
                         .mapToObj(Integer::toString)
                         .collect( Collectors.joining( "," ) );

If you just want the integer array of speeds:

int[] speeds = IntStream.iterate(lower, i -> i <= upper, i -> i + step).toArray();

Or, if you want the array of speeds as Strings:

String[] allSpeedsAsArray = IntStream.iterate(lower, i -> i <= upper, i -> i + step)
                                     .mapToObj(Integer::toString)
                                     .toArray();

Source Link

created Jul 19, 2018 at 19:55

AJNeufeld

34k
5
39
101

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