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海量数据相似度计算之simhash短文本查找 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...以JAVA 来说，存储一个simhash 需要一个原生态 lang 类型是64位 = 8 byte，如果是 Object 对象还需要额外的 8 byte，所以我们尽量节约空间使用原生态的lang类型。假设增长到最大的5000w数据， 5000w * 8byte = 400000000byte = 400000000/( 1024 * 1024) = ...
Convert a character digit to the corresponding integer in C
...strtol() works like this:
long strtol(const char *str, char **endptr, int base);
It converts *str to a long, treating it as if it were a base base number. If **endptr isn't null, it holds the first non-digit character strtol() found (but who cares about that).
...
How do I view cookies in Internet Explorer 11 using Developer Tools
...en a cookie goes missing or is corrupted.
– RhinoDevX64
Apr 11 '14 at 18:25
Agree that this is not the best approach (...
Build fat static library (device + simulator) using Xcode and SDK 4+
...within XCode
#
# Author: Adam Martin - http://twitter.com/redglassesapps
# Based on: original script from Eonil (main changes: Eonil's script WILL NOT WORK in Xcode GUI - it WILL CRASH YOUR COMPUTER)
#
set -e
set -o pipefail
#################[ Tests: helps workaround any future bugs in Xcode ]####...
Do Swift-based applications work on OS X 10.9/iOS 7 and lower?
Will Swift-based applications work on OS X 10.9 (Mavericks)/iOS 7 and lower?
19 Answers
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How do I change the text of a span element using JavaScript?
...pports either of these properties and if so, assigns the "newtext".
Live demo: here
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Python List vs. Array - when to use?
... for data that could be represented with simple C types (e.g. float or uint64_t).
The array.array type, on the other hand, is just a thin wrapper on C arrays. It can hold only homogeneous data (that is to say, all of the same type) and so it uses only sizeof(one object) * length bytes of memory. M...
How to mkdir only if a directory does not already exist?
...es with one command
mkdir -p project/{lib/ext,bin,src,doc/{html,info,pdf},demo/stat/a}
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Command line for looking at specific port
...nds up giving the following kind of output:
TCP 192.168.0.105:50466 64.34.119.101:80 ESTABLISHED
TCP 192.168.0.105:50496 64.34.119.101:80 ESTABLISHED
As you can see, this only shows the connections on port 80 for the TCP protocol.
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Remove non-utf8 characters from string
... // Encode as 11000011 10xxxxxx.
return "\xC3".chr(ord($captures[3])-64);
}
}
preg_replace_callback($regex, "utf8replacer", $text);
EDIT:
!empty(x) will match non-empty values ("0" is considered empty).
x != "" will match non-empty values, including "0".
x !== "" will match anything exce...