Why does Kotlin use global functions like arrayOfWhy can't I define a static method in a Java interface?Why does Java have transient fields?Why use getters and setters/accessors?Why are static variables considered evil?Why does this code using random strings print “hello world”?Accessing Kotlin extension functions from JavaDoes Kotlin have an identity function?Calling a class's method as default arg in constructorKotlin Function TypesHow does Kotlin dispatch the invoke operator?
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Why does Kotlin use global functions like arrayOf
Why can't I define a static method in a Java interface?Why does Java have transient fields?Why use getters and setters/accessors?Why are static variables considered evil?Why does this code using random strings print “hello world”?Accessing Kotlin extension functions from JavaDoes Kotlin have an identity function?Calling a class's method as default arg in constructorKotlin Function TypesHow does Kotlin dispatch the invoke operator?
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I'm new to Kotlin. I find this to be a weird practice.
With the case of arrayOf / mutableListOf, the instinct is to try a construct one of these types using a constructor, i.e. new Array<T>(...args). Or even a static factory method, like i.e. LocalDateTime.of(...).
Why wasn't new Array<T>() used, or at least a scoped function, i.e. Array.of. Don't these methods also clutter the global scope?
java kotlin
asked Mar 9 at 0:55
TobiqTobiq
863414
add a comment |
I'm new to Kotlin. I find this to be a weird practice.
With the case of arrayOf / mutableListOf, the instinct is to try a construct one of these types using a constructor, i.e. new Array<T>(...args). Or even a static factory method, like i.e. LocalDateTime.of(...).
Why wasn't new Array<T>() used, or at least a scoped function, i.e. Array.of. Don't these methods also clutter the global scope?
java kotlin
asked Mar 9 at 0:55
TobiqTobiq
863414
JRE doesn’t have a global scope, it will always be wrapped in a class.
– van dench
Mar 9 at 1:08
Yes, when compiled. I'm talking about the global scope in Kotlin. There are a host of things, that aren't scoped to a form of class / namespace, lying around in there.
– Tobiq
Mar 9 at 1:13
There is no global scope - everything is in a package. Some packages are imported by default (like java.lang is in Java) but that doesn't put them in a global scope.
– Erwin Bolwidt
Mar 9 at 1:37
add a comment |
I'm new to Kotlin. I find this to be a weird practice.
With the case of arrayOf / mutableListOf, the instinct is to try a construct one of these types using a constructor, i.e. new Array<T>(...args). Or even a static factory method, like i.e. LocalDateTime.of(...).
Why wasn't new Array<T>() used, or at least a scoped function, i.e. Array.of. Don't these methods also clutter the global scope?
java kotlin
asked Mar 9 at 0:55
TobiqTobiq
863414
I'm new to Kotlin. I find this to be a weird practice.
With the case of arrayOf / mutableListOf, the instinct is to try a construct one of these types using a constructor, i.e. new Array<T>(...args). Or even a static factory method, like i.e. LocalDateTime.of(...).
Why wasn't new Array<T>() used, or at least a scoped function, i.e. Array.of. Don't these methods also clutter the global scope?
java kotlin
java kotlin
asked Mar 9 at 0:55
TobiqTobiq
863414
asked Mar 9 at 0:55
TobiqTobiq
863414
asked Mar 9 at 0:55
TobiqTobiq
863414
asked Mar 9 at 0:55
TobiqTobiq
863414
asked Mar 9 at 0:55
TobiqTobiq
863414
863414
JRE doesn’t have a global scope, it will always be wrapped in a class.
– van dench
Mar 9 at 1:08
Yes, when compiled. I'm talking about the global scope in Kotlin. There are a host of things, that aren't scoped to a form of class / namespace, lying around in there.
– Tobiq
Mar 9 at 1:13
There is no global scope - everything is in a package. Some packages are imported by default (like java.lang is in Java) but that doesn't put them in a global scope.
– Erwin Bolwidt
Mar 9 at 1:37
add a comment |
JRE doesn’t have a global scope, it will always be wrapped in a class.
– van dench
Mar 9 at 1:08
Yes, when compiled. I'm talking about the global scope in Kotlin. There are a host of things, that aren't scoped to a form of class / namespace, lying around in there.
– Tobiq
Mar 9 at 1:13
There is no global scope - everything is in a package. Some packages are imported by default (like java.lang is in Java) but that doesn't put them in a global scope.
– Erwin Bolwidt
Mar 9 at 1:37
JRE doesn’t have a global scope, it will always be wrapped in a class.
– van dench
Mar 9 at 1:08
JRE doesn’t have a global scope, it will always be wrapped in a class.
– van dench
Mar 9 at 1:08
Yes, when compiled. I'm talking about the global scope in Kotlin. There are a host of things, that aren't scoped to a form of class / namespace, lying around in there.
– Tobiq
Mar 9 at 1:13
Yes, when compiled. I'm talking about the global scope in Kotlin. There are a host of things, that aren't scoped to a form of class / namespace, lying around in there.
– Tobiq
Mar 9 at 1:13
There is no global scope - everything is in a package. Some packages are imported by default (like java.lang is in Java) but that doesn't put them in a global scope.
– Erwin Bolwidt
Mar 9 at 1:37
There is no global scope - everything is in a package. Some packages are imported by default (like java.lang is in Java) but that doesn't put them in a global scope.
– Erwin Bolwidt
Mar 9 at 1:37
add a comment |
2 Answers
2
active
oldest
votes
arrayOf and mutableListOf are not in "global scope" (that's not even something that exists). They're in the kotlin and kotlin.collections packages, respectively.
It just so happens that kotlin.* and kotlin.collections.* are default imports of any kotlin file, so you don't have to make that import yourself. See Default Imports.
This is similar to Java where java.lang.* is imported by default and you don't need to specify it.
Also, you can't "construct" arrayOf and mutableListOf because they're not types; they're methods - and the fact the they start with a lowercase letter is the standard way to indicate that - types start with uppercase letters.
Kotlin allows methods at package level outside a class (although when compiled for the JVM, they will be inside a class), but that's not very different from an import static in Java with which you can access a static method from a class without the classname as a prefix.
answered Mar 9 at 1:23
Erwin BolwidtErwin Bolwidt
24.5k123860
add a comment |
- Kotlin does not use the
newkeyword. - It makes it clear if the Array is Mutable or not.
- There are javascript and native libraries that will map the call to other implementations.
answered Mar 9 at 1:12
Steven SpunginSteven Spungin
8,11132634
Point 2 doesn't make sense. MutableArray.of is clearly a mutable array.
– Tobiq
Mar 9 at 1:14
With point 3, the same can happen with a factory method
– Tobiq
Mar 9 at 1:15
@Tobiq Doesn't Kotlin havearrayOfandmutableArrayOf?
– Steven Spungin
Mar 9 at 1:16
@Tobiq with point 3, the other libs don't have an Array class. Actually , I would have hoped for the [...] shorthand like Groovy uses. JetBrains at least added that syntax to annotations a few versions ago.
– Steven Spungin
Mar 9 at 1:21
add a comment |
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arrayOf and mutableListOf are not in "global scope" (that's not even something that exists). They're in the kotlin and kotlin.collections packages, respectively.
It just so happens that kotlin.* and kotlin.collections.* are default imports of any kotlin file, so you don't have to make that import yourself. See Default Imports.
This is similar to Java where java.lang.* is imported by default and you don't need to specify it.
Also, you can't "construct" arrayOf and mutableListOf because they're not types; they're methods - and the fact the they start with a lowercase letter is the standard way to indicate that - types start with uppercase letters.
Kotlin allows methods at package level outside a class (although when compiled for the JVM, they will be inside a class), but that's not very different from an import static in Java with which you can access a static method from a class without the classname as a prefix.
answered Mar 9 at 1:23
Erwin BolwidtErwin Bolwidt
24.5k123860
add a comment |
arrayOf and mutableListOf are not in "global scope" (that's not even something that exists). They're in the kotlin and kotlin.collections packages, respectively.
It just so happens that kotlin.* and kotlin.collections.* are default imports of any kotlin file, so you don't have to make that import yourself. See Default Imports.
This is similar to Java where java.lang.* is imported by default and you don't need to specify it.
Also, you can't "construct" arrayOf and mutableListOf because they're not types; they're methods - and the fact the they start with a lowercase letter is the standard way to indicate that - types start with uppercase letters.
Kotlin allows methods at package level outside a class (although when compiled for the JVM, they will be inside a class), but that's not very different from an import static in Java with which you can access a static method from a class without the classname as a prefix.
answered Mar 9 at 1:23
Erwin BolwidtErwin Bolwidt
24.5k123860
add a comment |
arrayOf and mutableListOf are not in "global scope" (that's not even something that exists). They're in the kotlin and kotlin.collections packages, respectively.
It just so happens that kotlin.* and kotlin.collections.* are default imports of any kotlin file, so you don't have to make that import yourself. See Default Imports.
This is similar to Java where java.lang.* is imported by default and you don't need to specify it.
Also, you can't "construct" arrayOf and mutableListOf because they're not types; they're methods - and the fact the they start with a lowercase letter is the standard way to indicate that - types start with uppercase letters.
Kotlin allows methods at package level outside a class (although when compiled for the JVM, they will be inside a class), but that's not very different from an import static in Java with which you can access a static method from a class without the classname as a prefix.
answered Mar 9 at 1:23
Erwin BolwidtErwin Bolwidt
24.5k123860
arrayOf and mutableListOf are not in "global scope" (that's not even something that exists). They're in the kotlin and kotlin.collections packages, respectively.
It just so happens that kotlin.* and kotlin.collections.* are default imports of any kotlin file, so you don't have to make that import yourself. See Default Imports.
This is similar to Java where java.lang.* is imported by default and you don't need to specify it.
Also, you can't "construct" arrayOf and mutableListOf because they're not types; they're methods - and the fact the they start with a lowercase letter is the standard way to indicate that - types start with uppercase letters.
Kotlin allows methods at package level outside a class (although when compiled for the JVM, they will be inside a class), but that's not very different from an import static in Java with which you can access a static method from a class without the classname as a prefix.
answered Mar 9 at 1:23
Erwin BolwidtErwin Bolwidt
24.5k123860
answered Mar 9 at 1:23
Erwin BolwidtErwin Bolwidt
24.5k123860
answered Mar 9 at 1:23
Erwin BolwidtErwin Bolwidt
24.5k123860
answered Mar 9 at 1:23
Erwin BolwidtErwin Bolwidt
24.5k123860
24.5k123860
add a comment |
add a comment |
- Kotlin does not use the
newkeyword. - It makes it clear if the Array is Mutable or not.
- There are javascript and native libraries that will map the call to other implementations.
answered Mar 9 at 1:12
Steven SpunginSteven Spungin
8,11132634
Point 2 doesn't make sense. MutableArray.of is clearly a mutable array.
– Tobiq
Mar 9 at 1:14
With point 3, the same can happen with a factory method
– Tobiq
Mar 9 at 1:15
@Tobiq Doesn't Kotlin havearrayOfandmutableArrayOf?
– Steven Spungin
Mar 9 at 1:16
@Tobiq with point 3, the other libs don't have an Array class. Actually , I would have hoped for the [...] shorthand like Groovy uses. JetBrains at least added that syntax to annotations a few versions ago.
– Steven Spungin
Mar 9 at 1:21
add a comment |
- Kotlin does not use the
newkeyword. - It makes it clear if the Array is Mutable or not.
- There are javascript and native libraries that will map the call to other implementations.
answered Mar 9 at 1:12
Steven SpunginSteven Spungin
8,11132634
Point 2 doesn't make sense. MutableArray.of is clearly a mutable array.
– Tobiq
Mar 9 at 1:14
With point 3, the same can happen with a factory method
– Tobiq
Mar 9 at 1:15
@Tobiq Doesn't Kotlin havearrayOfandmutableArrayOf?
– Steven Spungin
Mar 9 at 1:16
@Tobiq with point 3, the other libs don't have an Array class. Actually , I would have hoped for the [...] shorthand like Groovy uses. JetBrains at least added that syntax to annotations a few versions ago.
– Steven Spungin
Mar 9 at 1:21
add a comment |
- Kotlin does not use the
newkeyword. - It makes it clear if the Array is Mutable or not.
- There are javascript and native libraries that will map the call to other implementations.
answered Mar 9 at 1:12
Steven SpunginSteven Spungin
8,11132634
- Kotlin does not use the
newkeyword. - It makes it clear if the Array is Mutable or not.
- There are javascript and native libraries that will map the call to other implementations.
answered Mar 9 at 1:12
Steven SpunginSteven Spungin
8,11132634
answered Mar 9 at 1:12
Steven SpunginSteven Spungin
8,11132634
answered Mar 9 at 1:12
Steven SpunginSteven Spungin
8,11132634
answered Mar 9 at 1:12
Steven SpunginSteven Spungin
8,11132634
8,11132634
Point 2 doesn't make sense. MutableArray.of is clearly a mutable array.
– Tobiq
Mar 9 at 1:14
With point 3, the same can happen with a factory method
– Tobiq
Mar 9 at 1:15
@Tobiq Doesn't Kotlin havearrayOfandmutableArrayOf?
– Steven Spungin
Mar 9 at 1:16
@Tobiq with point 3, the other libs don't have an Array class. Actually , I would have hoped for the [...] shorthand like Groovy uses. JetBrains at least added that syntax to annotations a few versions ago.
– Steven Spungin
Mar 9 at 1:21
add a comment |
Point 2 doesn't make sense. MutableArray.of is clearly a mutable array.
– Tobiq
Mar 9 at 1:14
With point 3, the same can happen with a factory method
– Tobiq
Mar 9 at 1:15
@Tobiq Doesn't Kotlin havearrayOfandmutableArrayOf?
– Steven Spungin
Mar 9 at 1:16
@Tobiq with point 3, the other libs don't have an Array class. Actually , I would have hoped for the [...] shorthand like Groovy uses. JetBrains at least added that syntax to annotations a few versions ago.
– Steven Spungin
Mar 9 at 1:21
Point 2 doesn't make sense. MutableArray.of is clearly a mutable array.
– Tobiq
Mar 9 at 1:14
Point 2 doesn't make sense. MutableArray.of is clearly a mutable array.
– Tobiq
Mar 9 at 1:14
With point 3, the same can happen with a factory method
– Tobiq
Mar 9 at 1:15
With point 3, the same can happen with a factory method
– Tobiq
Mar 9 at 1:15
@Tobiq Doesn't Kotlin have
arrayOf and mutableArrayOf?– Steven Spungin
Mar 9 at 1:16
@Tobiq Doesn't Kotlin have
arrayOf and mutableArrayOf?– Steven Spungin
Mar 9 at 1:16
@Tobiq with point 3, the other libs don't have an Array class. Actually , I would have hoped for the [...] shorthand like Groovy uses. JetBrains at least added that syntax to annotations a few versions ago.
– Steven Spungin
Mar 9 at 1:21
@Tobiq with point 3, the other libs don't have an Array class. Actually , I would have hoped for the [...] shorthand like Groovy uses. JetBrains at least added that syntax to annotations a few versions ago.
– Steven Spungin
Mar 9 at 1:21
add a comment |
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JRE doesn’t have a global scope, it will always be wrapped in a class.
– van dench
Mar 9 at 1:08
Yes, when compiled. I'm talking about the global scope in Kotlin. There are a host of things, that aren't scoped to a form of class / namespace, lying around in there.
– Tobiq
Mar 9 at 1:13
There is no global scope - everything is in a package. Some packages are imported by default (like java.lang is in Java) but that doesn't put them in a global scope.
– Erwin Bolwidt
Mar 9 at 1:37