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联网 App 第 4 课：图片上传，压缩后用 Web 客户端传到服务器、列表直接显...
...数据库存的是文本，想存图片只能把图片转成很长的 Base64 文字，体积还会再大三分之一，读写都慢，很多服务对单个值也有大小限制。
更好的分工是：
手机 ──图片文件──▶ 服务端 /upload ──返回──▶ 图片地址 http://...
How to import a module given the full path?
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@SridharRatnakumar the value of the first argument of imp.load_source only sets the .__name__ of the returned module. it doesn't effect loa...
How can you iterate over the elements of an std::tuple?
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Under GCC 8.1/mingw-64, I get two warnings for the use of boost::fusion::for_each with std lambda expressions: boost/mpl/assert.hpp:188:21: warning: unnecessary parentheses in declaration of 'assert_arg' [-Wparentheses] failed ************ (Pr...
Random data in Unit Tests?
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Robert GouldRobert Gould
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How to configure postgresql for the first time?
...safe and not recommended.
This worked for me in the standard Ubuntu 14.04 64 bits installation.
I followed the instructions, with small modifications, that I found in http://suite.opengeo.org/4.1/dataadmin/pgGettingStarted/firstconnect.html
Install postgreSQL (if not already in your machine):
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Python dictionary from an object's fields
...7
dF.dF.
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Get MD5 hash of big files in Python
...es advantage of the fact that MD5 has 128-byte digest blocks (8192 is 128×64). Since you're not reading the entire file into memory, this won't use much more than 8192 bytes of memory.
In Python 3.8+ you can do
import hashlib
with open("your_filename.txt", "rb") as f:
file_hash = hashlib.md5(...
How can I set the request header for curl?
... Mads MobækMads Mobæk
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How to “comment-out” (add comment) in a batch/cmd?
...hough they used if if instead of goto stackoverflow.com/q/9074476/995714 ss64.com/vb/syntax-hybrid.html stackoverflow.com/a/34512715/995714
– phuclv
Jan 8 '17 at 6:45
add a co...
JavaScript check if variable exists (is defined/initialized)
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Samuel Liew♦Samuel Liew
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