Good nodes on various topics:

Closures / Higher order functions

• How A Function Becomes Higher Order
• Closure on Closures
• Re: understanding closures

PerlMonks CSS (based on Re: Perl-blue theme (Aristotle/Demerphq Blue)

body {
    color: #000;
    background-color: #eee;
    font-size: smaller;
    font-family: Verdana, Arial, Lucida, Helvetica, sans-serif;
}

td, th {
    color: #000;
    font-size: smaller;
    font-family: Verdana, Arial, Lucida, Helvetica, sans-serif;
}
/* white page content */
td.main_content { background-color: #fff; }

a:link {
    color: #036;
}

a:visited {
    color: #06c;
}

a.nnt-link:visited { color: #60f;}

span.user-243505 {display:none; } /* hide im2 in OU list */

/* highlight specific users in OU */
.user-3607 a:link, .user-3607 a:visited,
.user-22609 a:link, .user-22609 a:visited,
.user-25047 a:link, .user-25047 a:visited,
.user-108447 a:link, .user-108447 a:visited,
.user-221638 a:link, .user-22168 a:visited,
.user-272750 a:link, .user-272750 a:visited,
.user-299049 a:link, .user-299049 a:visited,
{color: #A00;}


h3.other, 
h3.superdoc, 
h3.categorized_answer, 
h3.categorized_question 
{
    font-size: 28px;
    font-family: Georgia, serif;
    padding: 10px;
}

pre, 
tt { font-family: "Bitstream Vera Sans Mono", monospace; }

tt { font-size: 14px; }

textarea { height: 25em; }

input, 
select {
    margin: 3px;
    font-size: 9pt;
    font-family: "Bitstream Vera Sans", Verdana, Arial, Lucida, Helvet
+ica, sans-serif;
}

table[bgcolor="#000066"] {
    border: solid 1px black;
    background-color: #069;
}

td.section_title {
    color: #fff;
    background-color: #069;
    font-size: 26px;
    font-family: Georgia, serif;
    font-weight: bold;
}
tr.titlebar, td.titlebar, table.titlebar {
    background-color: #069;
    font-size: 26px;
    font-family: Georgia, serif;
}
table.nodelet_container {
    background-color: #069;
}
tbody.nodelet th, th.nodehead {
    color: #fff;
    background-color: #069;
    padding-right: 0.5em;
    text-align: right;
}
tr.add-root-blurb {
    background-color: #069;
}  
tbody.nodelet td, td.nodebody {
    background-color: #eee;
}
#approval_nodelet input[type="text"] {
    background: #fcc;
}
textarea[name="note_doctext"], input[name="note_title"] {
    font-family: monospace;
    width: 80%;
}
.spacer[height~="75"], a[href="http://pair.com"] {
    display: none;
}
h2, h3 { margin-bottom: 5px; }
h3 { padding-left: 6px; }

/*li { list-style-type: none; } */
li div { margin-left: 2em; }
q { display: block; }
cite:before { content: "\2014\A0" }
#quotes + * li { padding: 0.5em; }

p.domain_link { text-align: center; }
span.currentdomain { font-weight: bold; }
span.node_id { font-weight: bold; }
span.even {text-align: center; }
tr.nodelet_head_row {font-size: 8pt; }

/* 
   i have pmdev/synch/adim nodelets on, this makes them look like a si
+ngle
   nodelet or merged together 
*/
#nodelet_head_row_Synch_Nodelet { display: none; }
#nodelet_head_row_Admin_Nodelet { display: none; }

/* make sure none of the above cause trouble for the RAT */
#nodethreads li {width: 100%;}
#nodethreads ul {
  list-style: none;
  margin-left: 0;
  padding-left: 1em;
  text-indent: 0em;
  white-space:normal;
}
#nodethreads ul ul {border :0;}

p.nnt-p-title { width: 70%; } 
p.nnt-author { width: 28%; }       

.code
{
      /*display: block;*/
      color: #8f0;
      background-color: #333;
      border-left: solid #888 5px;
      padding-right: 10px;
      padding-left: 10px;
      padding-top: 5px;
      /*font-size: 8pt;*/
      /*width: 93%;*/
      margin-right: 0px;
      margin-left: auto;
      font-family: monospace;
      
      white-space: pre;
      white-space: -pre-wrap;
      
}

.codetext {
          font-size: 10pt;
}

.embed-code-dl a {
      color: #ccc;
}

textarea {
      width: 90%;
      height: 300px;
}

/* make the pair banner go away, i like em, but im here too often */
#monkbar tr {display: none;}
#monkbar tr.titlebar {display: block; }

/* make sure that site code displays larger */
.listcode,.diff_strings { font-size: larger; }

/* make user settings easier to use */
table.user-settings,
.user-settings textarea { 
     width: 100%; 
}
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