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Cron job every three days
...ated by requiring the introduction of the concept of when such patterns "reset". For example, is the pattern reset when the time is changed (i.e. the crontab entry is revised)? Look to your favorite calendar app to see how complicated it can get to express Repeating patterns of scheduled events, a...
Delete all files in directory (but not directory) - one liner solution
I want to delete all files inside ABC directory.
11 Answers
11
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Best/Most Comprehensive API for Stocks/Financial Data [closed]
...I'm not too picky about how it's exposed (SOAP, REST, some proprietary XML setup, etc.), as long as it's got some decent documentation.
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Undefined behavior and sequence points
... Steve Summit:
Sequence point is a point in time at which the dust has settled and all side effects which have been seen so far are guaranteed to be complete.
What are the common sequence points listed in the C++ Standard ?
Those are:
at the end of the evaluation of full expression (§1.9...
Initialising an array of fixed size in python [duplicate]
I would like to know how i can initialise an array(or list), yet to be populated with values, to have a defined size.
11 An...
how to listen to N channels? (dynamic select statement)
... only thing the more complicated reflect code has going for it is that the setup is faster (with GOMAXPROCS=1) since it doesn't need a bunch of goroutines. In every other case a simple goroutine merging channel blows away the reflect solution (by ~2 orders of magnitude).
– Dave...
A definitive guide to API-breaking changes in .NET
I would like to gather as much information as possible regarding API versioning in .NET/CLR, and specifically how API changes do or do not break client applications. First, let's define some terms:
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How to run a single test from a rails test suite?
How can I run a single test from a rails test suite?
12 Answers
12
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Which one will execute faster, if (flag==0) or if (0==flag)?
Interview question: Which one will execute faster, if (flag==0) or if (0==flag) ? Why?
16 Answers
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Linear Regression and group by in R
...regression coefficient r^2:
## make fake data
library(data.table)
set.seed(1)
dat <- data.table(x=runif(100), y=runif(100), grp=rep(1:2,50))
##calculate the regression coefficient r^2
dat[,summary(lm(y~x))$r.squared,by=grp]
grp V1
1: 1 0.01465726
2: 2 ...