Errata

I'd suggest the example of the generalization of indexOfAny should be changed to allIndexesOfAny, instead of lazyIndexOfAny.

The name "lazyIndexOfAny" does not reflect the fact that the function may now return a collection (Vector) instead of a single value.

Good read, btw!

I'd suggest the example of the generalization of indexOfAny should be changed to allIndexesOfAny, instead of lazyIndexOfAny.

The name "lazyIndexOfAny" does not reflect the fact that the function may now return a collection (Vector) instead of a single value.

Good read, btw!

On the first page it says:
"Even if you don?t care anything about Scala or Clojure, and are happy coding in your current language for the rest of career,..."

I think it should be:
"Even if you don?t care anything about Scala or Clojure, and are happy coding in your current language for the rest of YOUR career,..."

Jon Bently
should be
Jon Bentley

"C\++" should be "C++"

Here and elsewhere in the book a raven graphic (quothing, nevermore) appears. That graphic isn't introduced in the front matter (p. vii), which itself seems to indicate that a version of the books cover art will be used for tips.

"to make errors.I will" is missing a space after the period.

"The Indexofany() method" should be "The indexOfAny() method"

If you're going to use the equals sign to indicate what each call returns, you should use == (equality test) rather than = (assignment).

ex:
StringUtils.indexOfAny(null, *) = -1

should be

StringUtils.indexOfAny(null, *) == -1

"the problems asks for only the first match" should be "the problem asks for only the first match" (omit the S at the end of PROBLEM)

Text says:

"But langauges like Scala feature" instead of
"But languages like Scala feature"


"Language" is mispelled in several other locations in book.

" JavaScript?s if statment works" -> " JavaScript?s if statement works" (missing e)

"Writing functional code doesn?t require a *shift* to a functional programming language like Scala or Clojure but rather a *shift* in the way you approach problems."

You emphasize SHIFT... but that's not your parallel difference: consider emphasizing PROGRAMMING LANGUAGE and APPROACH.

Text says "In in imperative..."

Should say "In imperative.."

"Groovy has these features but names them more consistently with scripting languages like Ruby."

should be

"...than scripting languages..."

"The thread-last (->>)macro takes" needs space added after )

unlike other Java examples in this section, this example doesn't include the necessary import statements that would make the code executable.

"In the NumberClassifier class"... The class isn't called NumberClassifier, although the typeface used would lead you to think it was; the class is ImpNumberClassifierSimple.

unlike other Java examples in this section, this example doesn't include the necessary import statements that would make the code executable.

"the final call to unique(), which removes duplicates in the list, to
ensure that whole-number square roots (like 4) don?t appear in the list twice."

change "to ensure" to "ensures"

Or, instead of "_" you could specify that the seed value would be added to the first value of the list (in this case the seed value is 0).

The syntax coloring of the numeric literal 100_000 is incorrect.

"In Example 3-2, I create a couple of employees and determine if their salary meets the criteria."

There are multiple people with multiple salaries (your existing text suggest they share a single salary, which undermines the closure example).

Should be

"In Example 3-2, I create a couple of employees and determine if their salaries meet the criteria."

I believe the line "the idea of an implicit this context that appears as if by magic in every function"

should read (remove "this"):

"the idea of an implicit context that appears as if by magic in every function"

"own rules: language designer have access"

should be (designers - plural):

"own rules: language designers have access"

"functional programming will enter your life through the
langauge(s) you now use as they evolve."

language(s) is spelled wrong

"racge" should be "range"

Need a space between "chapters," and "but" (chapters,but)

There's a "z" at the very end of the 2nd paragraph that should be removed (data structures.z).

"introducced" should be "introduced"

"multi-methods" should be "multimethods" (no dash) to be consistent with the rest of the paragraph.

Unless you are trying to relive the 80's, you should remove the word "like" from the line "you?d like just return a keyword".

The footer on the last page reads "Chapter 0: Advance" when it should be "Chapter 6: Advance" (6 instead of 0).