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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 ...
程序员用数据思维教你如何追女生 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...维教你如何追女生好啦，今天这次IT内部培训，我们不讲编码技术，也不灌鸡汤要求大家加班。今天我们谈一个你们这群单身狗已经掌握却一直没怎么用的技能：追求...
好啦，今天这次IT内部培训，我们不讲编码技术，也不灌鸡...
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...
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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Best way to serialize an NSData into a hexadeximal string
I am looking for a nice-cocoa way to serialize an NSData object into a hexadecimal string. The idea is to serialize the deviceToken used for notification before sending it to my server.
...
How can I convince IE to simply display application/json rather than offer to download it?
...lication/json]
"CLSID"="{25336920-03F9-11cf-8FD0-00AA00686F13}"
"Encoding"=hex:08,00,00,00
[HKEY_CLASSES_ROOT\MIME\Database\Content Type\text/json]
"CLSID"="{25336920-03F9-11cf-8FD0-00AA00686F13}"
"Encoding"=hex:08,00,00,00
Then double-click the .reg file. Restart IE. The new behavior you get w...
Illegal mix of collations MySQL Error
...found working is to do the string compare by converting the strings into a hexadecimal representation of it's characters. On the database this is done with HEX(column). For PHP you may use this function:
public static function strToHex($string)
{
$hex = '';
for ($i=0; $i<strlen($string);...