body{ color:#444; font-family:Georgia, Palatino, 'Palatino Linotype', Times, 'Times New Roman', "Hiragino Sans GB", "STXihei", "微软雅黑", serif; font-size:12px; line-height:1.5em; background:#fefefe; width: 45em; margin: 10px auto; padding: 1em; outline: 1300px solid #FAFAFA; }

a{ color: #0645ad; text-decoration:none;} a:visited{ color: #0b0080; } a:hover{ color: #06e; } a:active{ color:#faa700; } a:focus{ outline: thin dotted; } a:hover, a:active{ outline: 0; }

span.backtick { border:1px solid #EAEAEA; border-radius:3px; background:#F8F8F8; padding:0 3px 0 3px; }

::-moz-selection{background:rgba(255,255,0,0.3);color:#000} ::selection{background:rgba(255,255,0,0.3);color:#000}

a::-moz-selection{background:rgba(255,255,0,0.3);color:#0645ad} a::selection{background:rgba(255,255,0,0.3);color:#0645ad}

p{ margin:1em 0; }

img{ max-width:100%; }

h1,h2,h3,h4,h5,h6{ font-weight:normal; color:#111; line-height:1em; } h4,h5,h6{ font-weight: bold; } h1{ font-size:2.5em; } h2{ font-size:2em; border-bottom:1px solid silver; padding-bottom: 5px; } h3{ font-size:1.5em; } h4{ font-size:1.2em; } h5{ font-size:1em; } h6{ font-size:0.9em; }

blockquote{ color:#666666; margin:0; padding-left: 3em; border-left: 0.5em #EEE solid; } hr { display: block; height: 2px; border: 0; border-top: 1px solid #aaa;border-bottom: 1px solid #eee; margin: 1em 0; padding: 0; }

pre , code, kbd, samp { color: #000; font-family: monospace; font-size: 0.88em; border-radius:3px; background-color: #F8F8F8; border: 1px solid #CCC; } pre { white-space: pre; white-space: pre-wrap; word-wrap: break-word; padding: 5px 12px;} pre code { border: 0px !important; padding: 0;} code { padding: 0 3px 0 3px; }

b, strong { font-weight: bold; }

dfn { font-style: italic; }

ins { background: #ff9; color: #000; text-decoration: none; }

mark { background: #ff0; color: #000; font-style: italic; font-weight: bold; }

sub, sup { font-size: 75%; line-height: 0; position: relative; vertical-align: baseline; } sup { top: -0.5em; } sub { bottom: -0.25em; }

ul, ol { margin: 1em 0; padding: 0 0 0 2em; } li p:last-child { margin:0 } dd { margin: 0 0 0 2em; }

img { border: 0; -ms-interpolation-mode: bicubic; vertical-align: middle; }

table { border-collapse: collapse; border-spacing: 0; } td { vertical-align: top; }

@media only screen and (min-width: 480px) { body{font-size:14px;} }

@media only screen and (min-width: 768px) { body{font-size:16px;} }

@media print {

• { background: transparent !important; color: black !important; filter:none !important; -ms-filter: none !important; } body{font-size:12pt; max-width:100%; outline:none;} a, a:visited { text-decoration: underline; } hr { height: 1px; border:0; border-bottom:1px solid black; } a[href]:after { content: " (" attr(href) ")"; } abbr[title]:after { content: " (" attr(title) ")"; } .ir a:after, a[href^="javascript:"]:after, a[href^="#"]:after { content: ""; } pre, blockquote { border: 1px solid #999; padding-right: 1em; page-break-inside: avoid; } tr, img { page-break-inside: avoid; } img { max-width: 100% !important; } @page :left { margin: 15mm 20mm 15mm 10mm; } @page :right { margin: 15mm 10mm 15mm 20mm; } p, h2, h3 { orphans: 3; widows: 3; } h2, h3 { page-break-after: avoid; } } README

idx = bSearch.equality data, 300 if idx?

prints 24 300

console.log idx, data[ idx ] else console.log 'not found'

compare = ( value ) -> return 0 if probe - delta <= value <= probe + delta return -1 if probe - delta < value return +1

[ lo_idx, hi_idx ] = bSearch.interval data, compare if lo_idx?

prints [ 20, 27 ] [ 210, 378 ]

console.log [ lo_idx, hi_idx, ], [ data[ lo_idx ], data[ hi_idx ], ] else console.log 'not found'