object Process extends ProcessImpl with ProcessCreation
Methods for constructing simple commands that can then be combined.
- Source
- Process.scala
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final
def
!=(arg0: Any): Boolean
Test two objects for inequality.
Test two objects for inequality.
- returns
true
if !(this == that), false otherwise.
- Definition Classes
- AnyRef → Any
-
final
def
##(): Int
Equivalent to
x.hashCode
except for boxed numeric types andnull
.Equivalent to
x.hashCode
except for boxed numeric types andnull
. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. Fornull
returns a hashcode wherenull.hashCode
throws aNullPointerException
.- returns
a hash value consistent with ==
- Definition Classes
- AnyRef → Any
-
final
def
==(arg0: Any): Boolean
The expression
x == that
is equivalent toif (x eq null) that eq null else x.equals(that)
.The expression
x == that
is equivalent toif (x eq null) that eq null else x.equals(that)
.- returns
true
if the receiver object is equivalent to the argument;false
otherwise.
- Definition Classes
- AnyRef → Any
-
def
apply(name: String, exitValue: ⇒ Int): ProcessBuilder
Creates a scala.sys.process.ProcessBuilder from a
String
name and aBoolean
.Creates a scala.sys.process.ProcessBuilder from a
String
name and aBoolean
. This can be used to force an exit value, with the name being used fortoString
.- Definition Classes
- ProcessCreation
-
def
apply(value: Boolean): ProcessBuilder
Creates a scala.sys.process.ProcessBuilder from a
Boolean
.Creates a scala.sys.process.ProcessBuilder from a
Boolean
. This can be to force an exit value.- Definition Classes
- ProcessCreation
-
def
apply(url: URL): URLBuilder
Creates a scala.sys.process.ProcessBuilder from a
java.net.URL
.Creates a scala.sys.process.ProcessBuilder from a
java.net.URL
. ThisProcessBuilder
can then be used as aSource
, so that one can pipe things from it.- Definition Classes
- ProcessCreation
-
def
apply(file: File): FileBuilder
Creates a scala.sys.process.ProcessBuilder from a
java.io.File
.Creates a scala.sys.process.ProcessBuilder from a
java.io.File
. ThisProcessBuilder
can then be used as aSource
or aSink
, so one can pipe things from and to it.- Definition Classes
- ProcessCreation
-
def
apply(builder: JProcessBuilder): ProcessBuilder
Creates a scala.sys.process.ProcessBuilder from a
java.lang.ProcessBuilder
.Creates a scala.sys.process.ProcessBuilder from a
java.lang.ProcessBuilder
.- Definition Classes
- ProcessCreation
apply((new java.lang.ProcessBuilder("ls", "-l")) directory new java.io.File(System.getProperty("user.home")))
Example: -
def
apply(command: Seq[String], cwd: Option[File], extraEnv: (String, String)*): ProcessBuilder
Creates a scala.sys.process.ProcessBuilder with working dir optionally set to
File
and extra environment variables.Creates a scala.sys.process.ProcessBuilder with working dir optionally set to
File
and extra environment variables.- Definition Classes
- ProcessCreation
apply("java" :: javaArgs, params.get("cwd"), "CLASSPATH" -> "library.jar")
Example: -
def
apply(command: String, cwd: Option[File], extraEnv: (String, String)*): ProcessBuilder
Creates a scala.sys.process.ProcessBuilder with working dir optionally set to
File
and extra environment variables.Creates a scala.sys.process.ProcessBuilder with working dir optionally set to
File
and extra environment variables.- Definition Classes
- ProcessCreation
apply("java", params.get("cwd"), "CLASSPATH" -> "library.jar")
Example: -
def
apply(command: Seq[String], cwd: File, extraEnv: (String, String)*): ProcessBuilder
Creates a scala.sys.process.ProcessBuilder with working dir set to
File
and extra environment variables.Creates a scala.sys.process.ProcessBuilder with working dir set to
File
and extra environment variables.- Definition Classes
- ProcessCreation
apply("java" :: javaArgs, new java.io.File("/opt/app"), "CLASSPATH" -> "library.jar")
Example: -
def
apply(command: String, cwd: File, extraEnv: (String, String)*): ProcessBuilder
Creates a scala.sys.process.ProcessBuilder with working dir set to
File
and extra environment variables.Creates a scala.sys.process.ProcessBuilder with working dir set to
File
and extra environment variables.- Definition Classes
- ProcessCreation
apply("java", new java.io.File("/opt/app"), "CLASSPATH" -> "library.jar")
Example: -
def
apply(command: String, arguments: Seq[String]): ProcessBuilder
Creates a scala.sys.process.ProcessBuilder from a command represented by a
String
, and a sequence ofString
representing the arguments.Creates a scala.sys.process.ProcessBuilder from a command represented by a
String
, and a sequence ofString
representing the arguments.- Definition Classes
- ProcessCreation
apply("cat", files)
Example: -
def
apply(command: Seq[String]): ProcessBuilder
Creates a scala.sys.process.ProcessBuilder from a sequence of
String
, where the head is the command and each element of the tail is a parameter.Creates a scala.sys.process.ProcessBuilder from a sequence of
String
, where the head is the command and each element of the tail is a parameter.- Definition Classes
- ProcessCreation
apply("cat" :: files)
Example: -
def
apply(command: String): ProcessBuilder
Creates a scala.sys.process.ProcessBuilder from a
String
, including the parameters.Creates a scala.sys.process.ProcessBuilder from a
String
, including the parameters.- Definition Classes
- ProcessCreation
apply("cat file.txt")
Example: -
def
applySeq[T](builders: Seq[T])(implicit convert: (T) ⇒ Source): Seq[Source]
Creates a sequence of scala.sys.process.ProcessBuilder.Source from a sequence of something else for which there's an implicit conversion to
Source
.Creates a sequence of scala.sys.process.ProcessBuilder.Source from a sequence of something else for which there's an implicit conversion to
Source
.- Definition Classes
- ProcessCreation
-
final
def
asInstanceOf[T0]: T0
Cast the receiver object to be of type
T0
.Cast the receiver object to be of type
T0
.Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression
1.asInstanceOf[String]
will throw aClassCastException
at runtime, while the expressionList(1).asInstanceOf[List[String]]
will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested type.- returns
the receiver object.
- Definition Classes
- Any
- Exceptions thrown
ClassCastException
if the receiver object is not an instance of the erasure of typeT0
.
-
def
cat(files: Seq[Source]): ProcessBuilder
Creates a scala.sys.process.ProcessBuilder from a non-empty sequence of scala.sys.process.ProcessBuilder.Source, which can then be piped to something else.
Creates a scala.sys.process.ProcessBuilder from a non-empty sequence of scala.sys.process.ProcessBuilder.Source, which can then be piped to something else.
This will concatenate the output of all sources.
- Definition Classes
- ProcessCreation
-
def
cat(file: Source, files: Source*): ProcessBuilder
Creates a scala.sys.process.ProcessBuilder from one or more scala.sys.process.ProcessBuilder.Source, which can then be piped to something else.
Creates a scala.sys.process.ProcessBuilder from one or more scala.sys.process.ProcessBuilder.Source, which can then be piped to something else.
This will concatenate the output of all sources. For example:
import scala.sys.process._ import scala.sys.process.Process.cat import java.net.URL import java.io.File val spde = new URL("http://technically.us/spde.html") val dispatch = new URL("http://dispatch.databinder.net/Dispatch.html") val build = new File("project/build.properties") cat(spde, dispatch, build) #| "grep -i scala" !
- Definition Classes
- ProcessCreation
-
def
clone(): AnyRef
Create a copy of the receiver object.
-
final
def
eq(arg0: AnyRef): Boolean
Tests whether the argument (
that
) is a reference to the receiver object (this
).Tests whether the argument (
that
) is a reference to the receiver object (this
).The
eq
method implements an equivalence relation on non-null instances ofAnyRef
, and has three additional properties:- It is consistent: for any non-null instances
x
andy
of typeAnyRef
, multiple invocations ofx.eq(y)
consistently returnstrue
or consistently returnsfalse
. - For any non-null instance
x
of typeAnyRef
,x.eq(null)
andnull.eq(x)
returnsfalse
. null.eq(null)
returnstrue
.
When overriding the
equals
orhashCode
methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2
), they should be equal to each other (o1 == o2
) and they should hash to the same value (o1.hashCode == o2.hashCode
).- returns
true
if the argument is a reference to the receiver object;false
otherwise.
- Definition Classes
- AnyRef
- It is consistent: for any non-null instances
-
def
equals(arg0: Any): Boolean
The equality method for reference types.
-
def
finalize(): Unit
Called by the garbage collector on the receiver object when there are no more references to the object.
Called by the garbage collector on the receiver object when there are no more references to the object.
The details of when and if the
finalize
method is invoked, as well as the interaction betweenfinalize
and non-local returns and exceptions, are all platform dependent. -
final
def
getClass(): Class[_]
Returns the runtime class representation of the object.
Returns the runtime class representation of the object.
- returns
a class object corresponding to the runtime type of the receiver.
- Definition Classes
- AnyRef → Any
-
def
hashCode(): Int
The hashCode method for reference types.
-
final
def
isInstanceOf[T0]: Boolean
Test whether the dynamic type of the receiver object is
T0
.Test whether the dynamic type of the receiver object is
T0
.Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression
1.isInstanceOf[String]
will returnfalse
, while the expressionList(1).isInstanceOf[List[String]]
will returntrue
. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the specified type.- returns
true
if the receiver object is an instance of erasure of typeT0
;false
otherwise.
- Definition Classes
- Any
-
final
def
ne(arg0: AnyRef): Boolean
Equivalent to
!(this eq that)
.Equivalent to
!(this eq that)
.- returns
true
if the argument is not a reference to the receiver object;false
otherwise.
- Definition Classes
- AnyRef
-
final
def
notify(): Unit
Wakes up a single thread that is waiting on the receiver object's monitor.
Wakes up a single thread that is waiting on the receiver object's monitor.
- Definition Classes
- AnyRef
- Note
not specified by SLS as a member of AnyRef
-
final
def
notifyAll(): Unit
Wakes up all threads that are waiting on the receiver object's monitor.
Wakes up all threads that are waiting on the receiver object's monitor.
- Definition Classes
- AnyRef
- Note
not specified by SLS as a member of AnyRef
-
final
def
synchronized[T0](arg0: ⇒ T0): T0
- Definition Classes
- AnyRef
-
def
toString(): String
Creates a String representation of this object.
Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.
- returns
a String representation of the object.
- Definition Classes
- AnyRef → Any
-
final
def
wait(): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
-
final
def
wait(arg0: Long, arg1: Int): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
-
final
def
wait(arg0: Long): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
This is the documentation for the Scala standard library.
Package structure
The scala package contains core types like
Int
,Float
,Array
orOption
which are accessible in all Scala compilation units without explicit qualification or imports.Notable packages include:
scala.collection
and its sub-packages contain Scala's collections frameworkscala.collection.immutable
- Immutable, sequential data-structures such asVector
,List
,Range
,HashMap
orHashSet
scala.collection.mutable
- Mutable, sequential data-structures such asArrayBuffer
,StringBuilder
,HashMap
orHashSet
scala.collection.concurrent
- Mutable, concurrent data-structures such asTrieMap
scala.collection.parallel.immutable
- Immutable, parallel data-structures such asParVector
,ParRange
,ParHashMap
orParHashSet
scala.collection.parallel.mutable
- Mutable, parallel data-structures such asParArray
,ParHashMap
,ParTrieMap
orParHashSet
scala.concurrent
- Primitives for concurrent programming such asFutures
andPromises
scala.io
- Input and output operationsscala.math
- Basic math functions and additional numeric types likeBigInt
andBigDecimal
scala.sys
- Interaction with other processes and the operating systemscala.util.matching
- Regular expressionsOther packages exist. See the complete list on the right.
Additional parts of the standard library are shipped as separate libraries. These include:
scala.reflect
- Scala's reflection API (scala-reflect.jar)scala.xml
- XML parsing, manipulation, and serialization (scala-xml.jar)scala.swing
- A convenient wrapper around Java's GUI framework called Swing (scala-swing.jar)scala.util.parsing
- Parser combinators (scala-parser-combinators.jar)Automatic imports
Identifiers in the scala package and the
scala.Predef
object are always in scope by default.Some of these identifiers are type aliases provided as shortcuts to commonly used classes. For example,
List
is an alias forscala.collection.immutable.List
.Other aliases refer to classes provided by the underlying platform. For example, on the JVM,
String
is an alias forjava.lang.String
.