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Hashing a dictionary?
...d make a frozenset with the dict's items and use hash():
hash(frozenset(my_dict.items()))
This is much less computationally intensive than generating the JSON string or representation of the dictionary.
UPDATE: Please see the comments below, why this approach might not produce a stable result.
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廉价共享存储解决方案1-drbd+ha+nfs - 更多技术 - 清泛网 - 专注C/C++及内核技术
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3.3.1先查看内核版本
ll -d /usr/src/kernels/2.6.32-358.el6.x86_64/
3.3.2 编译
cd /usr/local/src/ drbd-8.4.6
make KDIR=/usr/src/kernels/2.6.32-358.el6.x86_64/
3.3.3安装
make install
3.3.4加载模块
modprobe drbd
lsmod | grep drbd
drbd 376868 0
lib...
Python integer division yields float
... -, * and / to special functions, such that e.g. a + b is equivalent to
a.__add__(b)
Regarding division in Python 2, there is by default only / which maps to __div__ and the result is dependent on the input types (e.g. int, float).
Python 2.2 introduced the __future__ feature division, which cha...
BSS段、数据段、代码段、堆与栈 剖析 - C/C++ - 清泛网 - 专注C/C++及内核技术
...下其各自的.asm，发现在程序1.asm 中ar 的定义如下：
_BSS SEGMENT
?ar@@3PAHA DD 0493e0H DUP (?) ; ar
_BSS ENDS
而在程序2.asm 中，ar 被定义为：
_DATASEGMENT
?ar@@3PAHA DD 01H ; ar
DD 02H
DD 03H
ORG $+1199988
_DATAENDS
区别很明显，一个位于.bss 段...
廉价共享存储解决方案2-drbd+cman+gfs2 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... localhost.localdomain localhost6 localhost6.localdomain6
172.16.20.45 gfs_1
172.16.20.46 gfs_2
10.10.10.45 gfs_1
10.10.10.46 gfs_2
2、配置双机互信
[root@gfs_1 ~]# ssh-keygen -t rsa -P ''
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_r...
What does = +_ mean in JavaScript
I was wondering what the = +_ operator means in JavaScript. It looks like it does assignments.
12 Answers
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Split Python Flask app into multiple files
...like this:
Main.py
from flask import Flask
from AccountAPI import account_api
app = Flask(__name__)
app.register_blueprint(account_api)
@app.route("/")
def hello():
return "Hello World!"
if __name__ == "__main__":
app.run()
AccountAPI.py
from flask import Blueprint
account_api = Bl...
What is the formal difference in Scala between braces and parentheses, and when should they be used?
...e method expects a single parameter. For example:
List(1, 2, 3).reduceLeft{_ + _} // valid, single Function2[Int,Int] parameter
List{1, 2, 3}.reduceLeft(_ + _) // invalid, A* vararg parameter
However, there’s more you need to know to better grasp these rules.
Increased compile checking with pare...
AI助手生成代码编译apk报错 - AI 助手 - 清泛IT社区，为创新赋能！
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代码:D:\ChineseAppInventor\resources\app.asar.unpacked\tmp\1781143258366_6476145339306496000-0\youngandroidproject\..\build\intermediates\res\merged\layout\abc_alert_dialog_button_bar_material.xml: note: using v22 attributes; synthesizing resource appinventor.ai_18721201607.BLtalka:layout/abc_ale...
How do I detect unsigned integer multiply overflow?
...thing>;
int x = <something>;
if ((x > 0) && (a > INT_MAX - x)) /* `a + x` would overflow */;
if ((x < 0) && (a < INT_MIN - x)) /* `a + x` would underflow */;
// For subtraction
#include <limits.h>
int a = <something>;
int x = <something>;
if...