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Java HashMap performance optimization / alternative
...around 20,000 codes for 26 million distinct objects. That is an average of 1,300 objects per hash bucket = very very bad. However if I turn the two arrays into a number in base 52 I am guaranteed to get a unique hash code for every object:
public int hashCode() {
// assume that both a an...
What is the difference between an expression and a statement in Python?
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14 Answers
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What is a “surrogate pair” in Java?
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131
The term "surrogate pair" refers to a means of encoding Unicode characters with high code-poin...
Converting camel case to underscore case in ruby
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Length of string in bash
...bytes len.\n" "${myvar}" $chrlen $bytlen
will render:
Généralités is 11 char len, but 14 bytes len.
you could even have a look at stored chars:
myvar='Généralités'
chrlen=${#myvar}
oLang=$LANG oLcAll=$LC_ALL
LANG=C LC_ALL=C
bytlen=${#myvar}
printf -v myreal "%q" "$myvar"
LANG=$oLang LC_A...
Hash collision in git
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Picking atoms on 10 Moons
An SHA-1 hash is a 40 hex character string... that's 4 bits per char...
Python String and Integer concatenation [duplicate]
...he str() function instead.
You can use :
string = 'string'
for i in range(11):
string +=`i`
print string
It will print string012345678910.
To get string0, string1 ..... string10 you can use this as @YOU suggested
>>> string = "string"
>>> [string+`i` for i in range(11)]
Upd...
Specify width in *characters*
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1em is the height of an M, rather than the width. Same holds for ex, which is the height of an x. More generally speaking, these are the heights of uppercase and lowercase letters.
Width is a totally different issue....
Cha...
Lost connection to MySQL server at 'reading initial communication packet', system error: 0
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31 Answers
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