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In vim, how do I get a file to open at the same line number I closed it at last time?
...
" reopening a file
if has("autocmd")
au BufReadPost * if line("'\"") > 0 && line("'\"") <= line("$")
\| exe "normal! g'\"" | endif
endif
If this doesn't work, a common problem is not having ownership of your ~/.viminfo file. If this is the case, th...
How to get the last character of a string in a shell?
...
Per @perreal, quoting variables is important, but because I read this post like 5 times before finding a simpler approach to the question at hand in the comments...
str='abcd/'
echo "${str: -1}"
Output: /
str='abcd*'
echo "${str: -1}"
Output: *
Thanks to everyone who participat...
String output: format or concat in C#?
...ook: " + (cElapsedMilliseconds) + "ms - " + (cElapsedTicks) + " ticks");
Thread.Sleep(4000);
Those are my results:
1000000 x result = string.Format("{0} {1}", p.FirstName, p.LastName); took: 618ms - 2213706 ticks
1000000 x result = (p.FirstName + " " + p.LastName); took: 166ms - 595610 ticks...
Can dplyr package be used for conditional mutating?
...s it can evaluate both 'yes' and 'no' cases, and nesting can get harder to read/maintain IMHO.
Here's a benchmark on relatively bigger data:
# R version 3.1.0
require(data.table) ## 1.9.2
require(dplyr)
DT <- setDT(lapply(1:6, function(x) sample(7, 1e7, TRUE)))
setnames(DT, letters[1:6])
# &...
Python subprocess.Popen “OSError: [Errno 12] Cannot allocate memory”
...erent instance on the same server as you running amock.
Memory-wise, we already know that subprocess.Popen uses fork/clone under the hood, meaning that every time you call it you're requesting once more as much memory as Python is already eating up, i.e. in the hundreds of additional MB, all in ord...
How many threads is too many?
I am writing a server, and I send each action of into a separate thread when the request is received. I do this because almost every request makes a database query. I am using a threadpool library to cut down on construction/destruction of threads.
...
How to securely save username/password (local)?
...n a file or registry key with permissions set so only the current user can read it. To get access to the original data, use ProtectedData.Unprotect():
byte[] plaintext= ProtectedData.Unprotect(ciphertext, entropy,
DataProtectionScope.CurrentUser);
Note that there are additional security consi...
MongoDB with redis
... it hits the cache server, it looks at all the keys it has and says oh I already found that blogpost, it doesn’t reach out to mongo, it just takes the result of the query and sends it directly to mongoose.
We are not doing complex query logic, no indices, nothing like that. Its as fast as possibl...
Constructor function vs Factory functions
...
As you already mentioned that some people try to use factory functions just because they don't intend to leave bugs where people forget to use new with the constructor function; I thought it's where one might need to see a how to repl...
How to select the row with the maximum value in each group
...ve the data available both inside and outside the group data.frame. If you read the data in with read.table or something, you would need to use with because those column names would not be available outside the data.frame.
– MrFlick
Jul 4 '14 at 15:56
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