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What is the advantage to using bloom filters?
... bits, for small integers, to an
arbitrary number of bits, such as for
strings (tries are an exception, since
they can share storage between
elements with equal prefixes). Linked
structures incur an additional linear
space overhead for pointers. A Bloom
filter with 1% error and an opti...
ADB not recognising Nexus 4 under Windows 7
...d 'Update Driver'
Selected 'Have Disk' and pointed it to [android-sdk-dir]\extras\google
Watched an 'ADB' driver install.
Opened Eclipse to successfully run on my Nexus 4.
Good luck!
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impro...
reference assignment is atomic so why is Interlocked.Exchange(ref Object, Object) needed?
...ces:
"Reads and writes of the following
data types are atomic: bool, char,
byte, sbyte, short, ushort, uint, int,
float, and reference types."
So, you can write to the volatile reference without risk of getting a corrupted value.
You should of course be careful with how you decide which...
MySQL root password change
...
> UPDATE mysql.user SET authentication_string=PASSWORD('MyNewPass') WHERE user='root'; >FLUSH PRIVILEGES; In MySQL version 5.7.x there is no more password field in the mysql table. It was replaced with authentication_string.
– Robert Antho...
Obtaining a powerset of a set in Java
...
Isn't complexity (n*2^n)? Because binary string is of length n, and in each iteration of the main loop we iterate the entire binary string.
– Maggie
Sep 17 '13 at 5:53
...
Changing variable names in Vim
...nvar()
expand("<cword>") gets the word under the cursor. The search string uses % for file-scope, and the \(\W\) patterns look for non-word characters at the boundary of the word to replace, and save them in variables \1 and \2 so as to be re-inserted in the replacement pattern.
...
What does the “Just” syntax mean in Haskell?
...r integer functions that are meant to return Natural numbers (for example, String.indexOf - when a substring is not found, the returned index is commonly designed to be negative)
return a special value (pointer): NULL or some such
silently return without doing anything: for example, lend could be wr...
Pretty printing JSON from Jackson 2.2's ObjectMapper
... of org.fasterxml.jackson.databind.ObjectMapper and would like to get a String with pretty JSON. All of the results of my Google searches have come up with Jackson 1.x ways of doing this and I can't seem to find the proper, non-deprecated way of doing this with 2.2. Even though I don't believe t...
How to split a string in Java
I have a string, "004-034556" , that I want to split into two strings:
35 Answers
35
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How to append rows to an R data frame
...<- function(n){
df <- data.frame(x = numeric(n), y = character(n), stringsAsFactors = FALSE)
for(i in 1:n){
df$x[i] <- i
df$y[i] <- toString(i)
}
df
}
Here's a similar approach, but one where the data.frame is created as the last step.
# Use preallocated vectors
f4 <...