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| class Memento : | |
| __mem__ = {} | |
| def __init__(self, f) : | |
| self.f = f | |
| def __call__(self, arg) : | |
| if arg not in self.__mem__ : | |
| self.__mem__[arg] = self.f(arg) | |
| return self.__mem__[arg] |
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| while true; do echo -n "◐\r"; sleep .1; echo -n "◓\r"; sleep .1; echo -n "◑\r"; sleep .1; echo -n "◒\r"; sleep .1; done | |
| while true; do echo -n "◜\r"; sleep .1; echo -n "◠\r"; sleep .1; echo -n "◝\r"; sleep .1; echo -n "◞\r"; sleep .1; echo -n "◡\r"; sleep .1; echo -n "◟\r"; sleep .1; done | |
| while true; do a=$a" "; echo -n "\r" $a "✈ "; sleep .1; done | |
| while true; do a=$a" "; echo -n "\r" $a "\xcf\x80\xce\xbf\xcf\x8d\xcf\x84\xcf\x83\xce\xb1 "; sleep .1; done |
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| class Node : | |
| def __init__( self, data ) : | |
| self.data = data | |
| self.next = None | |
| self.prev = None | |
| class LinkedList : | |
| def __init__( self ) : | |
| self.head = None |
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| def intersection( *A ) : | |
| res = [] | |
| while True : | |
| # check if the heads are the same | |
| all_same = True | |
| for i in range(1, len(A)) : | |
| if len(A[i]) > 0 and len(A[i-1]) > 0 and A[i-1][0] == A[i][0] : | |
| pass | |
| else : | |
| all_same = False |
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| ''' | |
| convert a number (given in string format) from a base f to base t | |
| ''' | |
| import string | |
| def convertbase( n, f, t ) : | |
| digits = list(string.digits+string.uppercase) | |
| rev_digits = {} |
ptigas
/ latency.txt
Created
May 31, 2012 13:14
— forked from jboner/latency.txt
Latency numbers every programmer should know
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| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns | |
| Compress 1K bytes with Zippy 3,000 ns | |
| Send 2K bytes over 1 Gbps network 20,000 ns | |
| Read 1 MB sequentially from memory 250,000 ns | |
| Round trip within same datacenter 500,000 ns | |
| Disk seek 10,000,000 ns |
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| # -*- encoding: utf-8 -*- | |
| def latex_decode( s ) : | |
| ''' | |
| A simple function which taks a latex escaping command | |
| and returns the appropriate unicode character according | |
| to this table (via wikipedia): | |
| LaTeX command Sample Description | |
| \`{o} ò grave accent |
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| Django==1.4 | |
| South==0.7.6 | |
| django-dbsettings==0.2 | |
| django-grappelli==2.3.8 | |
| pyechonest==4.2.21 | |
| simplejson==2.6.0 |
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| import json | |
| class API : | |
| ERROR = -1 | |
| OK = 0 | |
| class APIResponse(API) : | |
| def __init__(self, code, data) : | |
| self.code = code | |
| self.data = data |
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| <html> | |
| <head> | |
| </head> | |
| <body> | |
| </body> | |
| </html> |