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How can I get the sha1 hash of a string in node.js?
...var shasum = crypto.createHash('sha1')
shasum.update('foo')
shasum.digest('hex') // => "0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33"
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Understanding Python's “is” operator
...ider this:
>>> a = [1,2,3]
>>> b = [1,2,3]
>>> hex(id(a))
'0x1079b1440'
>>> hex(id(b))
'0x107960878'
>>> a is b
False
>>> a == b
True
>>>
The above example shows you that the identity (can also be the memory address in Cpython) is dif...
Named colors in matplotlib
...e are ten distinct colors:
HTML
You can also plot colors by their HTML hex code:
plt.plot([1,2], lw=4, c='#8f9805')
This is more similar to specifying and RGB tuple rather than a named color (apart from the fact that the hex code is passed as a string), and I will not include an image of the ...
BLE协议—广播和扫描 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...户可以直接用扫描和广播进行数据的传输（数据量不大，功耗要求较高的情况下），也可以在广播和扫描的基础上进行连接后点对点通信。广播访问地址广播包：广播包Access Address 固定为0x8E89BED6，广播包只能在广播信道（channel...
Create a hexadecimal colour based on a string with JavaScript
... string (will usually be a single word) and from that somehow generate a hexadecimal value between #000000 and #FFFFFF , so I can use it as a colour for a HTML element.
...
PHP function to generate v4 UUID
...4 UUID in PHP. This is the closest I've been able to come. My knowledge in hex, decimal, binary, PHP's bitwise operators and the like is nearly non existant. This function generates a valid v4 UUID up until one area. A v4 UUID should be in the form of:
...
How to create default value for function argument in Clojure
...imal "10")
;10
You could also create a "local default" using let:
(let [hex (partial string->integer 16)]
(* (hex "FF") (hex "AA")))
;43350
The partial function approach has one key advantage over the others: the consumer of the function can still decide what the default value will be rath...
App Inventor 2 拓展参考文档 · App Inventor 2 中文网
...I2UDP 拓展 - UDP广播通信协议
【蓝牙】BlueToothLE 拓展：低功耗蓝牙(BLE) Iot 专题
【WIFI】TaifunWiFi 拓展：手机WiFi连接管理
【FTP】App Inventor 2 FTP 上传下载全方案总结
【MD5、密码安全】Encrypt.Security 安全性扩展：MD5哈希，SHA1和S...
How do I use Node.js Crypto to create a HMAC-SHA1 hash?
... key = 'abcdeg'
crypto.createHmac('sha1', key)
.update(text)
.digest('hex')
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App Inventor 2 拓展参考文档 · App Inventor 2 中文网
...I2UDP 拓展 - UDP广播通信协议
【蓝牙】BlueToothLE 拓展：低功耗蓝牙(BLE) Iot 专题
【WIFI】TaifunWiFi 拓展：手机WiFi连接管理
【FTP】App Inventor 2 FTP 上传下载全方案总结
【MD5、密码安全】Encrypt.Security 安全性扩展：MD5哈希，SHA1和S...