Try (original) (raw)
We need a whole WithFilter class to honor the "doesn't create a new collection" contract even though it seems unlikely to matter much in a collection with max size 1.
We need a whole WithFilter class to honor the "doesn't create a new collection" contract even though it seems unlikely to matter much in a collection with max size 1.
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Supertypes
Applies the given partial function to the value from this Success or returns this if this is a Failure.
Applies the given partial function to the value from this Success or returns this if this is a Failure.
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Inverts this Try.
Inverts this Try. If this is a Failure, returns its exception wrapped in a Success. If this is a Success, returns a Failure containing an UnsupportedOperationException.
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Converts this to a Failure if the predicate is not satisfied.
Converts this to a Failure if the predicate is not satisfied.
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Returns the given function applied to the value from this Success or returns this if this is a Failure.
Returns the given function applied to the value from this Success or returns this if this is a Failure.
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Transforms a nested Try, ie, a Try of type Try[Try[T]], into an un-nested Try, ie, a Try of type Try[T].
Transforms a nested Try, ie, a Try of type Try[Try[T]], into an un-nested Try, ie, a Try of type Try[T].
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Applies fa if this is a Failure or fb if this is a Success.
Applies fa if this is a Failure or fb if this is a Success. If fb is initially applied and throws an exception, then fa is applied with this exception.
Value parameters
fa
the function to apply if this is a Failure
fb
the function to apply if this is a Success
Attributes
Returns
the results of applying the function
Example
val result: Try[Int] = Try { string.toInt }
log(result.fold(
ex => "Operation failed with " + ex,
v => "Operation produced value: " + v
))
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Applies the given function f if this is a Success, otherwise returns Unit if this is a Failure.
Applies the given function f if this is a Success, otherwise returns Unit if this is a Failure.
Note: If f throws, then this method may throw an exception.
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Returns the value from this Success or throws the exception if this is a Failure.
Returns the value from this Success or throws the exception if this is a Failure.
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Returns the value from this Success or the given default argument if this is a Failure.
Returns the value from this Success or the given default argument if this is a Failure.
Note:: This will throw an exception if it is not a success and default throws an exception.
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Returns true if the Try is a Failure, false otherwise.
Returns true if the Try is a Failure, false otherwise.
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Returns true if the Try is a Success, false otherwise.
Returns true if the Try is a Success, false otherwise.
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Maps the given function to the value from this Success or returns this if this is a Failure.
Maps the given function to the value from this Success or returns this if this is a Failure.
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Returns this Try if it's a Success or the given default argument if this is a Failure.
Returns this Try if it's a Success or the given default argument if this is a Failure.
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Applies the given function f if this is a Failure, otherwise returns this if this is a Success.
Applies the given function f if this is a Failure, otherwise returns this if this is a Success. This is like map for the exception.
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Applies the given function f if this is a Failure, otherwise returns this if this is a Success.
Applies the given function f if this is a Failure, otherwise returns this if this is a Success. This is like flatMap for the exception.
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Returns Left with Throwable if this is a Failure, otherwise returns Right with Success value.
Returns Left with Throwable if this is a Failure, otherwise returns Right with Success value.
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Returns None if this is a Failure or a Some containing the value if this is a Success.
Returns None if this is a Failure or a Some containing the value if this is a Success.
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Completes this Try by applying the function f to this if this is of type Failure, or conversely, by applying s if this is a Success.
Completes this Try by applying the function f to this if this is of type Failure, or conversely, by applying s if this is a Success.
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Creates a non-strict filter, which eventually converts this to a Failure if the predicate is not satisfied.
Creates a non-strict filter, which eventually converts this to a Failure if the predicate is not satisfied.
Note: unlike filter, withFilter does not create a new Try. Instead, it restricts the domain of subsequent map, flatMap, foreach, and withFilter operations.
As Try is a one-element collection, this may be a bit overkill, but it's consistent with withFilter on Option and the other collections.
Value parameters
p
the predicate used to test elements.
Attributes
Returns
an object of class WithFilter, which supports map, flatMap, foreach, and withFilter operations. All these operations apply to those elements of this Try which satisfy the predicate p.
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The name of the nth element of this product, 0-based.
The name of the nth element of this product, 0-based. In the default implementation, an empty string.
Value parameters
n
the index of the element name to return
Attributes
Returns
the name of the specified element
Throws
Inherited from:
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An iterator over the names of all the elements of this product.
An iterator over the names of all the elements of this product.
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Inherited from:
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An iterator over all the elements of this product.
An iterator over all the elements of this product.
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Returns
in the default implementation, an Iterator[Any]
Inherited from:
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A string used in the toString methods of derived classes.
A string used in the toString methods of derived classes. Implementations may override this method to prepend a string prefix to the result of toString methods.
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Returns
in the default implementation, the empty string
Inherited from:
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Checks whether this instance can possibly equal that.
Checks whether this instance can possibly equal that.
A method that should be called from every well-designed equals method that is open to be overridden in a subclass. See Programming in Scala, Chapter 28 for discussion and design.
Value parameters
that
the value being probed for possible equality
Attributes
Returns
true if this instance can possibly equal that, otherwise false
Inherited from:
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The size of this product.
The size of this product.
Attributes
Returns
for a product A(x1, ..., xk), returns k
Inherited from:
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The nth element of this product, 0-based.
The nth element of this product, 0-based. In other words, for a product A(x1, ..., xk), returns x(n+1) where 0 <= n < k.
Value parameters
n
the index of the element to return
Attributes
Returns
the element n elements after the first element
Throws
Inherited from:
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