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Grepping a huge file (80GB) any way to speed it up?
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153
Here are a few options:
1) Prefix your grep command with LC_ALL=C to use the C locale instead o...
Master-master vs master-slave database architecture?
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3
Where you need a single, updating, "truth" (as in financial systems) you need Master/Slave or indeed just Master. Where you can patch up the...
Determine if ActiveRecord Object is New
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edited Apr 11 '17 at 13:59
ndnenkov
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Scala downwards or decreasing for loop?
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230
scala> 10 to 1 by -1
res1: scala.collection.immutable.Range = Range(10, 9, 8, 7, 6, 5, 4, 3,...
Setting focus on an HTML input box on page load
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36
This line:
<input type="password" name="PasswordInput"/>
should have an id attribute, ...
.NET 4.0 build issues on CI server
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Static member initialization in a class template
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3 Answers
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MPICH vs OpenMPI
... information in the README distributed with each version (e.g. this is for 3.2.1). Note that because both Open-MPI and MPICH support the OFI (aka libfabric) networking layer, they support many of the same networks. However, libfabric is a multi-faceted API, so not every network may be supported th...
How to append rows to an R data frame
..., and then, at the end, create your data.frame.
Continuing with Julian's f3 (a preallocated data.frame) as the fastest option so far, defined as:
# pre-allocate space
f3 <- function(n){
df <- data.frame(x = numeric(n), y = character(n), stringsAsFactors = FALSE)
for(i in 1:n){
df$x[i...
Build a Basic Python Iterator
... return self.current
raise StopIteration
for c in Counter(3, 9):
print(c)
This will print:
3
4
5
6
7
8
This is easier to write using a generator, as covered in a previous answer:
def counter(low, high):
current = low
while current < high:
yield current
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