Quick Start --- Usage --- License
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Dreaming of a simple way to convert
byte[]toint[]?How about that:
int[] example = IntArrays.from(new byte[] { 1, 2, 3 });-
You need to concatenate two
chararrays?Nothing easier than that!
char[] pt1 = new char[] { 'h', 'e', 'l' };
char[] pt2 = new char[] { 'l', 'o' };
char[] result = CharArrays.concatAll(pt1, pt2);-
String.join()doesn't work for yourintarray?It might not, but the following code sure does!
int[] input = new int[] { 3, 2, 1 };
String result = IntArrays.join(";", input);Primitives is everything you'll ever need to work with primitive types!
- Download the binary jar file from the latest release on GitHub
- Additionally download the source and/or javadoc jar if needed
- Add the binary jar to your projects classpath
- Available Classes
- Conversions
- Random
- Array Concatenation
- Array Joining
- Array Contains
- Array Distinct
- Array Sequence Searching
- Array Sequence Counting
- Array Inserting
- Array Appending
- Min / Max
- Average
- Sum
- String Reversing
- String Formatting
- String Repeating
BoolsBytesCharsDoublesFloatsIntsLongsShortsStrings
BoolArraysByteArraysCharArraysDoubleArraysFloatArraysIntArraysLongArraysShortArrays
In the following example an int value is converted to short using Shorts, all other conversions work exactly the same way.
int i = 1;
short s = Shorts.from(i);Conversions from boolean return a value of 1 for true and a value of 0 for false. When converting to boolean a value of 1 returns true, any other value will result in false. The same applies to boolean[] conversions.
The next small code snippet shows how to generate a pseudorandom int value using Ints, random generation for other primitive types work the same way.
int i = Ints.random();The difference when generating an array of random values, for example a byte array, is that the size of the array needs to be specified.
byte[] ba = ByteArrays.random(5);To concate two or more boolean arrays using BoolArrays you can refer to the following piece of code. Array concatenations of other types follow the same pattern.
boolean[] ba1 = new boolean[] { true, false };
boolean[] ba2 = new boolean[] { false, false };
boolean[] merge = BoolArrays.concatAll(ba1, ba2);The following code shows how to easily convert an int array to a beautiful String, the same way String.join() works for CharSequence items. This can also be used for arrays of all other types.
int[] ia = new int[] { 1, 4, 5 };
String str = IntArrays.join("; ", ia);You can check if a short array contains a certain value like this:
short[] sa = new short[] { 1, 2, 3 };
boolean contains = ShortArrays.contains(sa, Shorts.from(2));The same pattern can be applied to all the other types.
To get only the unique values in a long array, you can use the following code which also applies to all other types.
long[] la = new long[] { 5, 3, 4, 5, 4, 5 };
long[] uniques = LongArrays.distinct(la);The above snippet would result in an array containing { 5, 3, 4 }.
If you want to find the first occurrence of 1 followed by 2 inside an int array you can just use this snippet:
int[] ia = new int[] { 5, 3, 1, 2, 4, 5, 4, 5 };
int index = IntArrays.findSequence(ia, 1, 2);Finding out how often 1 followed by 2 occurs inside a short array is really simple.
short[] sa = new short[] { 5, 3, 1, 2, 4, 1, 2, 4, 5 };
int count = ShortArrays.countSequence(sa, (short) 1, (short) 2);To insert a char array into another the following code is used.
char[] ca1 = new char[] { 'a', 'd' };
char[] ca2 = new char[] { 'b', 'c' };
char[] abcd = CharArrays.insert(ca1, ca2, 1);Appending values to the end of a long array has never been easier!
long[] la = new long[] { 1, 2, 3 };
long[] longer = LongArrays.append(la, 4, 5);You can simply get the smallest short value with the following code.
short[] sa = new short[] { 1, 2, 3 };
short smallest = ShortArrays.min(sa);To get the highest value you'd just replace min with max.
Calculating an average float value has never been as easy!
float average = FloatArrays.avg(1f, 7f, 7f);Summing up a big array of double values can be done like in the next snippet
double[] da = new double[] { 1.4, 2, 3 };
double sum = DoubleArrays.sum(da);Strings allows you to reverse strings without a big impact on memory usage.
String s = "Hello!";
String reverse = Strings.reverse(s);The snippet above would result in "!olleH".
A simple way to format strings without a big memory impact or complicated syntax is Strings.simpleFormat.
String world = "World";
char sign = '!';
String greeting = Strings.simpleFormat("Hello {}{}", world, sign);This would obviously result in "Hello World!".
simpleFormatis approximately 5 times faster thanString.format(which to be fair also has a lot more features).
A more in depth test showed that in fact when dealing with a lot of elements (10000+)
String.formatis the faster implementation.
To repeat a string multiple times simply do the following:
String str = "ab";
String letters = Strings.repeat(4, str);This would result in "abababab" (the string "ab" repeated 4 times).
MIT License
Copyright (c) 2016 Deletescape Media
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.