StringContext
Related Docs:
object StringContext
| package scala
The parts that make up the interpolated string, without the expressions that get inserted by interpolation.
Test two objects for inequality.
Test two objects for inequality.
true if !(this == that), false otherwise.
Equivalent to x.hashCode except for boxed numeric types and null.
Equivalent to x.hashCode except for boxed numeric types and null.
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.
For null returns a hashcode where null.hashCode throws a
NullPointerException.
a hash value consistent with ==
The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).
The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).
the object to compare against this object for equality.
true if the receiver object is equivalent to the argument; false otherwise.
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 a ClassCastException at
runtime, while the expression List(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.
the receiver object.
ClassCastException if the receiver object is not an instance of the erasure of type T0.
Checks that the length of the given argument args is one less than the number
of parts supplied to the enclosing StringContext.
Checks that the length of the given argument args is one less than the number
of parts supplied to the enclosing StringContext.
IllegalArgumentException if this is not the case.
Create a copy of the receiver object.
Tests whether the argument (arg0) is a reference to the receiver object (this).
Tests whether the argument (arg0) is a reference to the receiver object (this).
The eq method implements an equivalence relation on
non-null instances of AnyRef, and has three additional properties:
x and y of type AnyRef, multiple invocations of
x.eq(y) consistently returns true or consistently returns false.x of type AnyRef, x.eq(null) and null.eq(x) returns false.null.eq(null) returns true. When overriding the equals or hashCode 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).
true if the argument is a reference to the receiver object; false otherwise.
The formatted string interpolator.
The formatted string interpolator.
It inserts its arguments between corresponding parts of the string context.
It also treats standard escape sequences as defined in the Scala specification.
Finally, if an interpolated expression is followed by a parts string
that starts with a formatting specifier, the expression is formatted according to that
specifier. All specifiers allowed in Java format strings are handled, and in the same
way they are treated in Java.
For example:
val height = 1.9d val name = "James" println(f"$name%s is $height%2.2f meters tall") // James is 1.90 meters tall
IllegalArgumentException
if the number of parts in the enclosing StringContext does not exceed
the number of arguments arg by exactly 1.
if a parts string contains a backslash (\) character
that does not start a valid escape sequence.
Note: The f method works by assembling a format string from all the parts strings and using
java.lang.String.format to format all arguments with that format string. The format string is
obtained by concatenating all parts strings, and performing two transformations:
parts string except the first one.
If a formatting position does not refer to a % character (which is assumed to
start a format specifier), then the string format specifier %s is inserted. 2. Any % characters not in formatting positions must begin one of the conversions
%% (the literal percent) or %n (the platform-specific line separator).
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 between finalize and non-local returns
and exceptions, are all platform dependent.
Returns string formatted according to given format string.
Returns string formatted according to given format string.
Format strings are as for String.format
(@see java.lang.String.format).
A representation that corresponds to the dynamic class of the receiver object.
A representation that corresponds to the dynamic class of the receiver object.
The nature of the representation is platform dependent.
a representation that corresponds to the dynamic class of the receiver object.
not specified by SLS as a member of AnyRef
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 return false, while the
expression List(1).isInstanceOf[List[String]] will return true.
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.
true if the receiver object is an instance of erasure of type T0; false otherwise.
Equivalent to !(this eq that).
Equivalent to !(this eq that).
true if the argument is not a reference to the receiver object; false otherwise.
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.
not specified by SLS as a member of AnyRef
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.
not specified by SLS as a member of AnyRef
The parts that make up the interpolated string, without the expressions that get inserted by interpolation.
The raw string interpolator.
The raw string interpolator.
It inserts its arguments between corresponding parts of the string context.
As opposed to the simple string interpolator s, this one does not treat
standard escape sequences as defined in the Scala specification.
For example, the raw processed string raw"a\nb" is equal to the scala string "a\\nb".
Note: Even when using the raw interpolator, Scala will preprocess unicode escapes. For example:
scala> raw"\u0023" res0: String = #
IllegalArgumentException
if the number of parts in the enclosing StringContext does not exceed
the number of arguments arg by exactly 1.
The simple string interpolator.
The simple string interpolator.
It inserts its arguments between corresponding parts of the string context. It also treats standard escape sequences as defined in the Scala specification. Here's an example of usage:
val name = "James" println(s"Hello, $name") // Hello, James
In this example, the expression $name is replaced with the toString of the
variable name.
The s interpolator can take the toString of any arbitrary expression within
a ${} block, for example:
println(s"1 + 1 = ${1 + 1}") will print the string 1 + 1 = 2.
IllegalArgumentException
if the number of parts in the enclosing StringContext does not exceed
the number of arguments arg by exactly 1.
StringContext.InvalidEscapeException
if a parts string contains a backslash (\) character
that does not start a valid escape sequence.
This class provides the basic mechanism to do String Interpolation. String Interpolation allows users to embed variable references directly in *processed* string literals. Here's an example:
Any processed string literal is rewritten as an instantiation and method call against this class. For example:
s"Hello, $name"is rewritten to be:
By default, this class provides the
raw,sandfmethods as available interpolators.To provide your own string interpolator, create an implicit class which adds a method to
StringContext. Here's an example:Here the
JsonHelperextension class implicitly adds thejsonmethod toStringContextwhich can be used forjsonstring literals.The parts that make up the interpolated string, without the expressions that get inserted by interpolation.
2.10.0