diff options
Diffstat (limited to 'pod/perlfaq4.pod')
| -rw-r--r-- | pod/perlfaq4.pod | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/pod/perlfaq4.pod b/pod/perlfaq4.pod index 34b7e5b0f3..d3a7e8ccb9 100644 --- a/pod/perlfaq4.pod +++ b/pod/perlfaq4.pod @@ -271,7 +271,7 @@ C<tr///> function like so: $string = "ThisXlineXhasXsomeXx'sXinXit": $count = ($string =~ tr/X//); - print "There are $count X charcters in the string"; + print "There are $count X characters in the string"; This is fine if you are just looking for a single character. However, if you are trying to count multiple character substrings within a @@ -900,7 +900,7 @@ they end up doing is not what they do with ordinary hashes. Using C<keys %hash> in a scalar context returns the number of keys in the hash I<and> resets the iterator associated with the hash. You may need to do this if you use C<last> to exit a loop early so that when you -re-enter it, the hash iterator has been reset. +reenter it, the hash iterator has been reset. =head2 How can I get the unique keys from two hashes? @@ -955,7 +955,7 @@ Normally, merely accessing a key's value for a nonexistent key does I<not> cause that key to be forever there. This is different than awk's behavior. -=head2 How can I make the Perl equivalent of a C structure/C++ class/hash +=head2 How can I make the Perl equivalent of a C structure/C++ class/hash or array of hashes or arrays? Use references (documented in L<perlref>). Examples of complex data @@ -983,7 +983,7 @@ versus "binary" files. See L<perlfunc/"binmode">. If you're concerned about 8-bit ASCII data, then see L<perllocale>. -If you want to deal with multi-byte characters, however, there are +If you want to deal with multibyte characters, however, there are some gotchas. See the section on Regular Expressions. =head2 How do I determine whether a scalar is a number/whole/integer/float? @@ -994,7 +994,7 @@ Assuming that you don't care about IEEE notations like "NaN" or warn "has nondigits" if /\D/; warn "not a whole number" unless /^\d+$/; warn "not an integer" unless /^-?\d+$/; # reject +3 - warn "not an integer" unless /^[+-]?\d+$/; + warn "not an integer" unless /^[+-]?\d+$/; warn "not a decimal number" unless /^-?\d+\.?\d*$/; # rejects .2 warn "not a decimal number" unless /^-?(?:\d+(?:\.\d*)?|\.\d+)$/; warn "not a C float" |