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Using awk to remove the Byte-order mark
...t not UTF-16 files without a BOM) to UTF-8 without a BOM:
$ printf '\ufeffä\n'|iconv -f utf-8 -t utf-16be>bom-utf16be
$ printf '\ufeffä\n'|iconv -f utf-8 -t utf-16le>bom-utf16le
$ printf '\ufeffä\n'>bom-utf8
$ printf 'ä\n'|iconv -f utf-8 -t utf-16be>utf16be
$ printf 'ä\n'|iconv -f ...
Regex to match only letters
...r letters than A–Z, you can either add them to the character set: [a-zA-ZäöüßÄÖÜ]. Or you use predefined character classes like the Unicode character property class \p{L} that describes the Unicode characters that are letters.
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When is TCP option SO_LINGER (0) required?
...TIME_WAIT state, tying up all the available resources on a server.
When a TCP connection is closed cleanly, the end that initiated the close ("active close") ends up with the connection sitting in TIME_WAIT for several minutes. So if your protocol is one where the server initiates the connection c...
Why is SCTP not much used/known
...Stevens and I found that there is a third transport layer standard besides TCP and UDP: SCTP .
11 Answers
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How to escape double quotes in a title attribute
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&#177 | plus or minus sign ±
&#179 | superscript 3 ³
&#187 | double greater-than sign »
&#189 | fraction 1/2 ½
&#191 | inverted question mark ¿
&#8220 | left double quote “
&#8212 | dash —
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What is the theoretical maximum number of open TCP connections that a modern Linux box can have
...ng infinite performance from hardware, can a Linux box support >65536 open TCP connections?
3 Answers
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CDN（内容分发网络）技术原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...服务。同时，它还与分布在世界各地的所有CDNC节点保持通信，搜集各节点的通信状态，确保不将用户的请求分配到不可用的CDN节点上，实际上是通过DNS做全局负载均衡。
对于普通的Internet用户来讲，每个CDN节点就相当于一个放...
马化腾给创业者的3点建议：行业跨界领域最有机会诞生创新 - 资讯 - 清泛网 ...
...业者提出了多项建议。
“腾讯的历史也是这样，当年做通信的没有我懂互联网，做互联网的没有我懂通信，所以我做起了当时的QQ，包括现在的微信。”马化腾说，“这就是抓到了一个跨界的点。”
除了关注跨界领域，马化腾...
How many spaces will Java String.trim() remove?
...red Feb 4 '10 at 10:31
Juha SyrjäläJuha Syrjälä
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YouTube iframe API: how do I control an iframe player that's already in the HTML?
...beIframeAPIReady() function is not invoked.
– Humppakäräjät
Feb 4 '15 at 18:21
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