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What is getattr() exactly and how do I use it?
...in advance which attribute you want (it comes from a string). Very useful for meta-programming.
you want to provide a default value. object.y will raise an AttributeError if there's no y. But getattr(object, 'y', 5) will return 5.
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_=> what does this underscore mean in Lambda expressions?
...ut and from there, it spills over into other programming languages. It is, for example, also used in Ruby to mean the same thing as in this example, even though _ has absolutely no special significance in Ruby.
– Jörg W Mittag
May 6 '10 at 5:33
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Setting up two different static directories in node.js Express framework
...ic" and "homepage": "/public2" to the respective react app's package.json. For more info on using two react apps see my answer here stackoverflow.com/a/48569896/4746648
– Danny Harding
Feb 1 '18 at 21:52
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What is the best way to stop people hacking the PHP-based highscore table of a Flash game
...net games and contests. Your Flash code works with users to decide a score for a game. But users aren't trusted, and the Flash code runs on the user's computer. You're SOL. There is nothing you can do to prevent an attacker from forging high scores:
Flash is even easier to reverse engineer than yo...
Find all packages installed with easy_install/pip?
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list and freeze output different formats (as of the time of writing). The freeze output can be used to recreate environments: docs.python-guide.org/en/latest/dev/virtualenvs/#other-notes
– Tom Saleeba
Feb 19 '16 at 1:47...
Most efficient way to determine if a Lua table is empty (contains no entries)?
...correct code is
if next(myTable) == nil then
-- myTable is empty
end
For maximum efficiency you'll want to bind next to a local variable, e.g.,
...
local next = next
...
... if next(...) ...
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What does 'COLLATE SQL_Latin1_General_CP1_CI_AS' do?
...the server treat strings using charset latin 1, basically ascii
CP1 stands for Code Page 1252
CI case insensitive comparisons so 'ABC' would equal 'abc'
AS accent sensitive, so 'ü' does not equal 'u'
P.S. For more detailed information be sure to read @solomon-rutzky's answer.
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history.replaceState() example?
Can any one give a working example for history.replaceState? This is what w3.org says:
8 Answers
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搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...nfig/data --port 21000 --logpath /data/mongodbtest/config/log/config.log --fork
7、在每一台服务器分别启动mongos服务器。
/data/mongodbtest/mongodb-linux-x86_64-2.4.8/bin/mongos --configdb 192.168.0.136:21000,192.168.0.137:21000,192.168.0.138:21000 --port 20000 --logp...
Python threading.timer - repeat function every 'n' seconds
... Then it will finish it's sleep and stop afterwards. There is no way to forcibly suspend a thread in python. This is a design decision made by the python developers. However the net result will be the same. You thread will still run (sleep) for a short while, but it will not perform your function...