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Fastest way to determine if an integer's square root is an integer
...quare root routine. For example, look at the last digit of your number in hex by doing a bit-wise "and." Perfect squares can only end in 0, 1, 4, or 9 in base 16, So for 75% of your inputs (assuming they are uniformly distributed) you can avoid a call to the square root in exchange for some very ...
国务院常务会议“大数据” - 资讯 - 清泛网 - 专注C/C++及内核技术
国务院常务会议“大数据”国务院总理李克强7月28日主持召开国务院常务会议。《第一财经日报》记者统计,新一届政府就任至今,国务院常务会议已经召开近百次。 这...国务院总理李克强7月28日主持召开国务院常务会议。...
使用 C++ 处理 JSON 数据交换格式 - C/C++ - 清泛网 - 专注C/C++及内核技术
使用 C++ 处理 JSON 数据交换格式使用C++处理JSON数据交换格式一、摘要JSON的全称为:JavaScriptObject Notation,顾名思义,JSON是用于标记Javascript对象的,JSON官方的...一、摘要
JSON 的全称为:JavaScript Object Notation,顾名思义,JSON 是...
lua和c/c++互相调用实例分析 - C/C++ - 清泛网 - 专注C/C++及内核技术
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int luaL_loadfile(lua_State *L, const char *filename);
lua和c/c++的数据交互通过"栈"进行 ,操作数据时,首先将数据拷贝到"栈"上,然后获取数据,栈中的每个数据通过索引值进行定位,索引值为正时表示相对于栈底的偏移索引,索引值为...
Uber5岁了,一次性告诉你它的商业之道 - 资讯 - 清泛网 - 专注C/C++及内核技术
...,人人机会均等。这或许正是Uber的写照。它试图依靠大数据作为联系者,使每个普通人既成为消费者,又成为服务提供者,在提供服务与需求服务之间,建立一个无缝、高效的运转渠道。正如它的创始人特拉维斯·卡兰尼克(Travi...
Is there “0b” or something similar to represent a binary number in Javascript
I know that 0x is a prefix for hexadecimal numbers in Javascript. For example, 0xFF stands for the number 255.
10 Answe...
How to change line color in EditText
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@ASN opacity is added in hex color i the first two characters 00-FF so for instance: #A1FAFAFA
– aimiliano
Sep 18 '18 at 14:03
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All falsey values in JavaScript
... values in JavaScript
false
Zero of Number type: 0 and also -0, 0.0, and hex form 0x0 (thanks RBT)
Zero of BigInt type: 0n and -0n (new in 2020, thanks GetMeARemoteJob)
"", '' and `` - strings of length 0
null
undefined
NaN
document.all (in HTML browsers only)
This is a weird one. document.all ...
动态追踪(Dynamic Tracing)技术漫谈 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...多层次,包括操作系统内核然后上面是各种系统软件,像数据库和 Web 服务器,再往上有脚本语言或者其他高级语言的虚拟机、解释器及即时(JIT)编译器,顶上则是应用层面的各种业务逻辑的抽象层次和很多复杂的代码逻辑。
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What is the >>>= operator in C?
...gt;>= a[ !!0X.1P1 ] )
The literal 0xFULL is the same as 0xF (which is hex for 15); the ULL just specifies that it's an unsigned long long literal. In any case, as a boolean it's true, so 0xFULL ? '\0' : -1 evaluates to '\0', which is a character literal whose numerical value is simply 0.
Mean...
