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1ãƒã‚¤ãƒˆãŒ8bitã«å®šã¾ã£ãŸã®ã¯2008å¹´ - Qiita
ã¯ã˜ã‚ã« ã€2022/02/03è¿½è¨˜ã€‘ Twitterã§ã€1ãƒã‚¤ãƒˆã¯ä½•ãƒ“ãƒƒãƒˆã‹ã¨ã„ã†ã®ãŒè©±é¡Œã«ä¸Šã‚Šã€ã“ã®è¨˜äº‹ã‚‚æ€¥ã«å‚ç…§ã•ã‚Œã‚‹ã‚ˆã†ã«ãªã‚Šã¾ã—ãŸã€‚ è©±é¡Œã«ãªã‚‹ã“ã¨ã§è˜è€…ã®æ–¹ã€…ã‹ã‚‰ç§è‡ªèº«ã‚‚çŸ¥ã‚‰ãªã„çŸ¥è˜ã‚’å¾—ã‚‹ã“ã¨ãŒå‡ºæ¥ã¾ã—ãŸã€‚ æœ€çµ‚çš„ã«ã¯ã€ITmedia NEWSã®å¤§åŽŸé›„ä»‹ã•ã‚“ã®ä¸‹è¨˜ã®ç´ æ™´ã‚‰ã—ã„è¨˜äº‹ãŒç”£ã¾ã‚Œã‚‹ã“ã¨ã«ãªã£ãŸã®ã§è‰¯ã‹ã£ãŸã§ã™ã€‚ 1ãƒã‚¤ãƒˆã®å®šç¾© ãªãœã€1ãƒã‚¤ãƒˆã¯8bitã«ãªã£ãŸã®ã ã‚ã†ã¨ã„ã†ç–‘å•ã‹ã‚‰èª¿ã¹ã¯ã˜ã‚ã¾ã—ãŸã€‚ æ˜”ã¯4bitã®CPUãŒã‚ã£ãŸã‚ã‘ã ã—ã€ãã®æ™‚ã‚‚1ãƒã‚¤ãƒˆãŒ8bitãªã®ã‹4bitã§ã¯ãªã„ã®ã‹ï¼Ÿã¨ã„ã†ç–‘å•ãŒã‚ã„ãŸã‚ã‘ã§ã™ã€‚ çµè«–ã‹ã‚‰æ›¸ãã¨å½“æ™‚4bitã®CPUã®å ´åˆã€1ãƒã‚¤ãƒˆã¯4bitã ã£ãŸã‚ã‘ã§ã™ã€‚ ã¨ã¯ã„ãˆã€CPUã®å€¤ãŒãã®ã¾ã¾1ãƒã‚¤ãƒˆã«ãªã‚‹ã‚ã‘ã§ã¯ãªã„ã§ã™ï½¡ 1bit CPU ã¯ã§ãã‚‹ã®ã‹ï¼Ÿã«ã‚ˆã‚‹ã¨ é•·ã„æ´å²ã®ä¸ã§ã€CPUã®bité•·ã¯ALUé•·ã§ã‚‚ãªãã‚¢ãƒ‰ãƒ¬ã‚¹ãƒã‚¹é•·ã§ã‚‚ãª
yass 2017/08/17
byte

bit
ãƒªãƒ³ã‚¯
jmhãƒžã‚¤ã‚¯ãƒãƒ™ãƒ³ãƒãƒžãƒ¼ã‚¯ãƒ„ãƒ¼ãƒ«ã‚’ä½¿ã£ãŸByteBufferã®ãƒã‚¤ãƒˆã‚ªãƒ¼ãƒ€ã«ã‚ˆã‚‹ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ã®é•ã„ã®æ¯”è¼ƒ - seraphyã®æ—¥è¨˜
(ãƒ’ãƒ¼ãƒ—ãŠã‚ˆã³ãƒ€ã‚¤ãƒ¬ã‚¯ãƒˆãƒãƒƒãƒ•ã‚¡ã«ã‚ˆã‚‹ByteBufferã®æ€§èƒ½å·®ã€ãŠã‚ˆã³Unsafeã¨ã®ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ã‚‚æ¯”è¼ƒã™ã‚‹ã‚ˆï¼) (ã¨ã‚Šã‚ãˆãšè¨ˆæ¸¬çµæžœã‚’å…ˆã«çŸ¥ã‚ŠãŸã„äººã¯çµè«–ã‚’è¦‹ã¦ãï¼) (ãƒ•ã‚¡ã‚¤ãƒ«ã®ã‚·ãƒ¼ã‚±ãƒ³ã‚·ãƒ£ãƒ«ãƒªãƒ¼ãƒ‰ã‚’å«ã‚€ãƒ€ã‚¤ãƒ¬ã‚¯ãƒˆãƒãƒƒãƒ•ã‚¡ã®ä½¿ã„æ–¹ã‚„ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹æ¯”è¼ƒã«ã¤ã„ã¦ã¯æ¬¡ã®æ—¥è¨˜ã«æ›¸ãã¾ã—ãŸã€‚) æ¦‚è¦ æ€ã†ã¨ã“ã‚ã‚ã£ã¦ã€ãƒ’ãƒ¼ãƒ—ä¸Šã®byte[]ã‚’ãƒ©ãƒƒãƒ—ã—ãŸByteBufferã¨ã€ãƒ€ã‚¤ãƒ¬ã‚¯ãƒˆãƒãƒƒãƒ•ã‚¡ã‚’ç¢ºä¿ã—ã¦ã„ã‚‹ByteBufferã®å ´åˆã¨ã®intåž‹ã¨ã—ã¦ã®é€£ç¶šã‚¢ã‚¯ã‚»ã‚¹ã—ãŸå ´åˆã®ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹ã®é•ã„ã«ã¤ã„ã¦èª¿ã¹ã¦ã¿ã‚‹ã“ã¨ã«ã—ãŸã€‚ ç§ã®èªè˜ã§ã¯ã€ãƒ€ã‚¤ãƒ¬ã‚¯ãƒˆãƒãƒƒãƒ•ã‚¡ã¸ã®ã‚¢ã‚¯ã‚»ã‚¹ã¯éžãƒã‚¤ãƒ†ã‚£ãƒ–å´(ã¤ã¾ã‚ŠJavaã‚³ãƒ¼ãƒ‰å´)ã‹ã‚‰ã®ã‚¢ã‚¯ã‚»ã‚¹ã§ã¯ã‚ªãƒ¼ãƒãƒ˜ãƒƒãƒ‰ãŒå¤§ãã„ãŸã‚ã€ç‰¹æ®Šãªã‚·ãƒãƒ¥ã‚¨ãƒ¼ã‚·ãƒ§ãƒ³ä»¥å¤–ã§ã¯é…ããªã£ã¦ã—ã¾ã†ãŸã‚ã€ã‚ã¾ã‚Šä½¿ã„ã©ã“ã‚ã®ãªã„æ©Ÿèƒ½ã ã¨ã„ã†ã‚‚ã®ã ã£ãŸã®ã ãŒã€ã§ã¯ã€ãã®ä½¿ã„ã©ã“ã‚ã¨ãªã‚‹ã€Œç‰¹æ®Šãª
yass 2015/12/15
ByteBuffer

Java

unsafe

offheap

byte
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Introducing Wire Protocol Buffers
Data ScienceEnhancing Data Quality Using Better Designed ETLsSharing an ETL design doc template EngineeringMaking Insights-Driven Decisions in an Ecosystem o...Our approach to securing our cloud environments
yass 2015/12/11
ProtocolBuffers

java
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Searching 1.5TB/sec: Systems Engineering Before Algorithms | Scalyr
TL;DR: Four years ago, I left Google with the idea for a new kind of server monitoring tool. The idea was to combine traditionally separate functions such as log exploration, log aggregation and analysis, metrics gathering, alerting, and dashboard generation into a single service. One tenet was that the service should be fast, giving ops teams a lightweight, interactive, â€œfunâ€ experience. This wou
yass 2015/10/04
" We store log messages in pages of 4K; each page contains some messages (in UTF-8), and some metadata for each message. The metadata is a byte-packed structure which encodes the value length, internal message ID, and various other fields.Â "

grep

search

byte
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ãƒã‚¤ãƒŠãƒªãƒ‡ãƒ¼ã‚¿ã‚’æ‰±ã†ï¼ˆbitæ“ä½œã‚’å«ã‚€ï¼‰ãƒ©ã‚¤ãƒ–ãƒ©ãƒªPreon - torutkã®ãƒ–ãƒã‚°
ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã§å–ã‚Šæ‰±ã†ãƒ‡ãƒ¼ã‚¿å½¢å¼ã«ã¯ã€ãƒã‚¤ãƒŠãƒªå½¢å¼ã®ã‚‚ã®ãŒå¤šãã€ã•ã‚‰ã«ãƒ“ãƒƒãƒˆå˜ä½ã«å‰²ã‚Šä»˜ã‘ã‚‰ã‚Œã¦ã„ã‚‹ã‚‚ã®ãŒã‚ã‚Šã¾ã™ã€‚ ä¾‹ãˆã°ã€æ™‚åˆ»åŒæœŸã§ãŠãªã˜ã¿ã®NTPã§ã¯ã€RFC2030ã§è¦å®šã•ã‚Œã¦ã„ã‚‹ãƒ•ã‚©ãƒ¼ãƒžãƒƒãƒˆãŒã‚ã‚Šã¾ã™ã€‚ å…ˆé éƒ¨åˆ†ã‚’æŠœç²‹ã—ãŸã®ãŒæ¬¡ã§ã™ã€‚ 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |LI | VN |Mode | Stratum | Poll | Precision | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Root Delay | +-+-+-+-+-+-+-
yass 2013/11/26
" ByteBufferã‚’ãƒ©ãƒƒãƒ—ã—ã¦bitåˆ‡ã‚Šå‡ºã—ã§ãã‚‹ã‚ˆã†ã«ä½¿ç”¨ã‹ã¨è€ƒãˆã€BitBufferã‚’ä½œã‚ã†ã¨ã—ã¾ã—ãŸãŒã€ä¸–ã®ä¸ã«ã¯æ—¢ã«åŒã˜ã“ã¨ã‚’è§£æ±ºã—ã¦ã„ã‚‹ã‹ã‚‚ã¨æŽ¢ã—ã¦ã¿ãŸã‚‰ã€Preonãªã‚‹ãƒ©ã‚¤ãƒ–ãƒ©ãƒªãŒè¦‹ã¤ã‹ã‚Šã¾ã—ãŸã€‚"

bit

java

byte

ByteBuffer

serialization

preon
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wiki.nginx.org Managed WordPress Site â€“ Just another WordPress site
yass 2013/10/26
" This module can be thought out as a reverse byte-range request header. It's main utility is to allow Nginx to slice a big file in small pieces (byte-ranges) while permitting to use on-the-fly gzip compression. "

nginx

http

range

byte
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Variable-length quantity - Wikipedia
This article is about codes that are a variable number of bytes. For a more general category of variable-bit-length codes, see variable-length code. A variable-length quantity (VLQ) is a universal code that uses an arbitrary number of binary octets (eight-bit bytes) to represent an arbitrarily large integer. A VLQ is essentially a base-128 representation of an unsigned integer with the addition of
yass 2013/10/26
VLQ

integer

byte

vbyte
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How to grab an arbitrary chunk from a file on Unix/Linux
yass 2013/10/19
" $ echo "hello world 1234567890" | tail -c+9 | head -c6 "

dd

offset

tail

head

byte
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[Java]Byteåž‹ã‹ã‚‰Intåž‹ã¸ã®å¤‰æ›ã‚’æœ¬æ°—ã§è€ƒãˆã‚‹ | Creative Gear
Javaã§Byteåž‹å¤‰æ•°ã‚’Intåž‹ã«ã‚ãƒ£ã‚¹ãƒˆã™ã‚‹éš›ã«ã¯ã€æ°—ã‚’ä»˜ã‘ãªã‘ã‚Œã°ãªã‚‰ãªã„ã“ã¨ãŒã‚ã‚Šã¾ã™ã€‚ å‰å›žã®ã‚¨ãƒ³ãƒˆãƒªãƒ¼ã§ã€Byteåž‹é…åˆ—ã‚’16é€²æ•°æ–‡å—åˆ—ã«å¤‰æ›ã™ã‚‹ãƒ¡ã‚½ãƒƒãƒ‰ã‚’ä½œã‚Šã¾ã—ãŸãŒã€ãã®æ™‚ã«Byteåž‹ã‚’Intåž‹ã¸å¤‰æ›ã™ã‚‹ã«ã¯ã€ãŸã å˜ã«ã‚ãƒ£ã‚¹ãƒˆå¤‰æ›ã™ã‚‹ã®ã§ã¯ãªãã€ã€Œ0xFFã€ã§ANDãƒ“ãƒƒãƒˆæ¼”ç®—ã—ãªã‘ã‚Œã°å€¤ãŒãŠã‹ã—ããªã‚‹ã¨ã„ã†äº‹ã‚’æ›¸ãã¾ã—ãŸã€‚ ã©ã†ã„ã†äº‹ã‹ã¨ã„ã†ã¨â€¦ [java] byte a = (byte)0xC8 //10é€²æ•°ã§ã¯200ã®ã¯ãš int b = (int)a; Sytem.out.println(b); [/java] ã“ã®å®Ÿè¡Œçµæžœã¯ã€ã€Œ200ã€ã§ã¯ãªãã€ã€Œ-56ã€ãŒè¡¨ç¤ºã•ã‚Œã¾ã™ã€‚ ãã‚Œã‚’ã€ [java] byte a = (byte)0xC8 //10é€²æ•°ã§ã¯200ã®ã¯ãš int b = a & 0xff; Sytem.out.println(b); [/
yass 2013/09/18
" Byteåž‹(8ãƒ“ãƒƒãƒˆ)ã‹ã‚‰Intåž‹(32ãƒ“ãƒƒãƒˆ)ã«æ‹¡å¼µã™ã‚‹æ™‚ã«ã€è¶³ã‚Šãªã„éƒ¨åˆ†ã®24ãƒ“ãƒƒãƒˆåˆ†ã¯ã€ãƒ—ãƒ©ã‚¹ãƒžã‚¤ãƒŠã‚¹ã®ç¬¦å·ã‚’å¤‰ãˆãªã„ã‚ˆã†ã«åŸ‹ã‚ã‚‹ / 0xFFã‚‚16é€²æ•°è¡¨è¨˜ã®Intåž‹ã¨ã—ã¦æ‰±ã‚ã‚Œã¾ã™"

java

byte

integer

cast
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Confusion with megabytes, 1 megabyte is 1 million bytes or 1024 * 1024 (1048576) bytes?
yass 2013/05/26
unit

byte

bit

bps
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2é€²æŽ¥é è¾ž - Wikipedia
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yass 2013/05/25
unit

byte

bit

math
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ICU-docs - International Components for Unicode Docs
yass 2013/03/02
java

byte

array
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Using a byte array as Map key
yass 2013/03/02
java

byte
ãƒªãƒ³ã‚¯
PackBits (Apache Sanselan 0.97-incubator API)
yass 2012/11/10
java

comparison

byte

packbits

RLE
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Convert a byte array to integer in Java and vice versa
Just browsing Stack Overflow? Help us improve your experience. Sign up for research
yass 2012/09/23
java

integer

byte

convert
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How to get 0-padded binary representation of an integer in java?
for example, for 1, 2, 128, 256 the output can be (16 digits): 0000000000000001 0000000000000010 0000000010000000 0000000100000000 I tried String.format("%16s", Integer.toBinaryString(1)); it puts spaces for left-padding: ` 1' How to put 0s for padding. I couldn't find it in Formatter. Is there another way to do it? P.S. this post describes how to format integers with left 0-padding, but it is not
yass 2012/09/23
java

formart

binary

integer

byte
ãƒªãƒ³ã‚¯
niw.at â€” Base128
æœ€è¿‘ãŠéŠã³ã§ JavaScript ã‚’æ›¸ã„ã¦ã„ã‚‹ã¨æ°—ãŒã¤ã„ãŸã‚‰ C++ ã‚’æ›¸ã„ã¦ã‚‹ã®ã¯ãªãœã‹ç–‘å•ã«æ€ã£ã¦ã„ãŸã®ã§ã™ãŒã€ãã‚Œã¯ Node.js ã®æ‹¡å¼µãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã‚’ä½œã£ã¦ã„ãŸã‹ã‚‰ãªã®ã§ã—ãŸã€‚ ã¨ã„ã†ã‚ã‘ã§ã€ã—ã‚‡ã†ã‚‚ãªã„ã‚‚ã®ãŒã§ããŸã®ã§å…¬é–‹ã—ã¾ã™ã€‚ã¤ã„ã« npm ãƒ‡ãƒ“ãƒ¥ãƒ¼â˜… Base64 ã¨ã¯ Base64 ã¨ã¯ã€ã‚ªãƒªã‚¸ãƒŠãƒ«ã®ãƒã‚¤ãƒŠãƒªã‚’ 64 æ–‡å—ã®å¯è¦– ASCII æ–‡å—ã€ã¤ã¾ã‚Šå¤§æ–‡å—å°æ–‡å—è‹±å—52æ–‡å—ã¨æ•°å—10æ–‡å—ã¨ã‚ã¨ + ã¨ / (ä½™ç™½ã‚’åŸ‹ã‚ã‚‹ã®ã« = ã‚‚) ã‚’ä½¿ã£ã¦è¡¨ç¾ã™ã‚‹æ–¹å¼ã§ã€ä¾‹ãˆã°ã€ã‚ªãƒªã‚¸ãƒŠãƒ«ã® 3 ã‚ªã‚¯ãƒ†ãƒƒãƒˆã®ãƒ‡ãƒ¼ã‚¿ (24bit) ã¯ 4/3 å€ã•ã‚Œã¦ 4 ã‚ªã‚¯ãƒ†ãƒƒãƒˆ (32bit) ã«ãªã‚Šã¾ã™ã€‚ çµæžœã€ãƒã‚¤ãƒŠãƒªãƒ‡ãƒ¼ã‚¿ãŒã‚¯ãƒªãƒ¼ãƒ³ãª ASCII æ–‡å—ã§è¡¨ç¾ã§ãã‚‹ã®ã§å¯æ¬æ€§ãŒå¢—ã—ãŸã‚Šã—ã¾ã™ã€‚ å®Ÿéš›ã€ãã†ã¯ã„ã£ã¦ã‚‚ + ã¨ / ãŒã‚ã‚‹ã®ã§ã€URL ã«å…¥ã£ã¦ã‚‹ã¨ãƒ€ãƒ–ãƒ«ã‚¨ã‚¹ã‚±ãƒ¼ãƒ—ã•ã‚ŒãŸã‚Š
yass 2012/09/14
base64

encode

byte

JavaScript
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http://web.cecs.pdx.edu/~harry/compilers/ASCIIChart.pdf
yass 2012/08/28
byte

encoding

chart

ascii
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Character encoding, Unicode, UTF-8 (and a bit of chauvinism) explained for the masses
yass 2012/03/05
utf-8

unicode

bit

byte
ãƒªãƒ³ã‚¯
Javaã®hello worldã®èªã¿æ–¹ | mwSoft
å‰æ›¸ã ãŠé¦´æŸ“ã¿ã€hello worldã®ã‚½ãƒ¼ã‚¹ã€‚ class Hello { public static void main(String[] args) { System.out.println("hello world"); } } ã“ã®ã‚³ãƒ¼ãƒ‰ã¯ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ã•ã‚Œã‚‹ã¨ã€ã“ã‚“ãªãƒã‚¤ãƒˆã‚³ãƒ¼ãƒ‰ã«ãªã‚Šã¾ã™ã€‚ ca fe ba be 00 00 00 32 00 22 07 00 02 01 00 05 48 65 6c 6c 6f 07 00 04 01 00 10 6a 61 76 61 2f 6c 61 6e 67 2f 4f 62 6a 65 63 74 01 00 06 3c 69 6e 69 74 3e 01 00 03 28 29 56 01 00 04 43 6f 64 65 0a 00 03 00 09 0c 00 05 00 06 01 00 0f 4c 69 6e 65 4e
yass 2011/08/15
java

class

jvm

binary

byte
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