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Lua简明教程 - 脚本技术 - 清泛IT论坛，有思想、有深度
...Student : ".. self.year.." : " .. self.name
end复制代码
模块我们可以直接使用require(“model_name”)来载入别的lua文件，文件的后缀是.lua。载入的时候就直接执行那个文件了。比如：我们有一个hello.lua的文件：print("Hello, World!...
淘宝大秒系统设计详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...点key（Tengine和Tair缓存等中间件产品本身已经有热点统计模块）。
建立一个热点上报和可以按照需求订阅的热点服务的下发规范，主要目的是通过交易链路上各个系统（详情、购物车、交易、优惠、库存、物流）访问的时间...
How to get a random number in Ruby
...
If you're not only seeking for a number but also hex or uuid it's worth mentioning that the SecureRandom module found its way from ActiveSupport to the ruby core in 1.9.2+. So without the need for a full blown framework:
require 'securerandom'
p SecureRandom.random_number...
What does (x ^ 0x1) != 0 mean?
...
^ is the bitwise XOR operation
0x1 is 1 in hex notation
x ^ 0x1 will invert the last bit of x (refer to the XOR truth table in the link above if that's not clear to you).
So, the condition (0 != ( x ^ 0x1 )) will be true if x is greater than 1 or if the last bit of ...
Parsing HTML into NSAttributedText - how to set font?
...ability to set text color, just add color to style attribute with value in hex string format color: #000000. See this link for converting UIColor to hex string: gist.github.com/yannickl/16f0ed38f0698d9a8ae7
– Miroslav Hrivik
Aug 16 '17 at 14:19
...
Find CRLF in Notepad++
...ither Ctrl+M, $ nor \r\n are matched.
The same wiki also mentions the Hex editor alternative:
Type the new string at the beginning of the document.
Then select to view the document in Hex mode.
Select one of the new lines and hit Ctrl+H.
While you have the Replace dialog box up...
What does the git index contain EXACTLY?
...e we haven't modified the file
The first bytes are seconds since EPOCH in hex:
date --date="@$(printf "%x" "540976e6")"
Gives:
Fri Sep 5 10:40:06 CEST 2014
Which is when I made this example.
The second 4 bytes are nanoseconds.
UID and GID are 00 00 03 e8, 1000 in hex: a common value for sin...
How do I print a double value with full precision using cout?
...ctual double (with NO ROUND OFF ERROR) is to print out the binary bits (or hex nybbles).
One way of doing that is using a union to type-pun the double to a integer and then printing the integer, since integers do not suffer from truncation or round-off issues. (Type punning like this is not supporte...
When to use -retainCount?
...umber like 1152921504606846975 looks very mysterious until you write it in hex and get 0xfffffffffffffff. And 9223372036854775807 is 0x7fffffffffffffff in hex. And it really is not so surprising that someone would choose to use values like these as flags, given that it would take almost 3000 years ...
How to generate a git patch for a specific commit?
...ied.
The "base commit" is shown as "base-commit: " followed by the 40-hex of
the commit object name.
A "prerequisite patch" is shown as "prerequisite-patch-id: " followed by the 40-hex "patch id", which can be obtained by passing the patch through the "git patch-id --stable" command.
Gi...