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When to make a type non-movable in C++11?
...gave a good example of a type which shouldn't be movable: std::mutex.
The OS's native mutex type (e.g. pthread_mutex_t on POSIX platforms) might not be "location invariant" meaning the object's address is part of its value. For example, the OS might keep a list of pointers to all initialized mutex ...
Why does running the Flask dev server run itself twice?
...use_reloader to False you'll see the behaviour go away, but then you also lose the reloading functionality:
app.run(port=4004, debug=config.DEBUG, host='0.0.0.0', use_reloader=False)
You can disable the reloader when using the flask run command too:
FLASK_DEBUG=1 flask run --no-reload
You can ...
Check to see if python script is running
...cleanly, and check for it when you start up.
#/usr/bin/env python
import os
import sys
pid = str(os.getpid())
pidfile = "/tmp/mydaemon.pid"
if os.path.isfile(pidfile):
print "%s already exists, exiting" % pidfile
sys.exit()
file(pidfile, 'w').write(pid)
try:
# Do some actual work her...
How to manually create icns files using iconutil?
...ary/mac/documentation/GraphicsAnimation/…
– Peter Hosey
Sep 7 '12 at 6:44
@Anne: except the iconutil command is only...
How is mime type of an uploaded file determined by browser?
...st to catch types that we can
// deduce but that we also want to allow the OS to override.
The hard-coded lists come a bit earlier in the file: https://cs.chromium.org/chromium/src/net/base/mime_util.cc?l=170 (kPrimaryMappings and kSecondaryMappings).
An example: when uploading a CSV file from a Wi...
App Inventor 2 Encrypt.Security 安全性扩展：MD5哈希，SHA1和SHA256哈希...
...A私钥和RSA公钥。
方法
BASE64Encode
此方法用于BASE64编码一个字符串。输入 plaintext
BASE64Decode
此方法用于BASE64解码字符串。输入 ciphertext
GenerateRsaKeyPair
此方法用于生成一对RSA加密/解密密钥（including a private key and a public key...
Apache Prefork vs Worker MPM
...ne and only one MPM must be loaded into the server at any time. MPMs are chosen during configuration and compiled into the server by using the argument --with-mpm=NAME with the configure script where NAME is the name of the desired MPM.
Apache will use a default MPM for each operating system unless...
After Installing Java JDK 7 For Mac OS X - mvn -version still shows java version 1.6.0_31
Oracle released Java JDK 7 on April 26 for Mac OS X. I followed the install instructions and when I do java -version in a terminal window I get:
...
Copying text outside of Vim with set mouse=a enabled
...ou do that (you may also want to :set paste to avoid unexpected effects).
OS X (mac):
hold alt/option while selecting (source)
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Unicode and UTF-8 - 综合 - 清泛IT论坛，有思想、有深度
...和ucs-4 编码方式，其中,bmp是Basic Multilingual Plane的简写。
一个字符的Unicode编码(码点)是唯一确定的，但由于不同系统平台实现方式的不同（如字节序的不同)，或基于传输或节省存储空间等各种因素考虑，Unicode的实现方式各不相...