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Get hours difference between two dates in Moment Js
... the OP aware of a typo that most IDE's would reveal to you anyway ( imgur.com/a/ikyayIL ). SO rep is first in best dressed while others work for scraps smh. Oh you fixed a typo.. here's 4.7k rep
– zanderwar
Jul 4 '19 at 3:19
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Copying PostgreSQL database to another server
...l to remote and the second one is from remote to local. More -> https://www.postgresql.org/docs/9.6/app-pgdump.html
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Is multiplication and division using shift operators in C actually faster?
...difficult to do meaningfully, but we can look at a few facts. From http://www.penguin.cz/~literakl/intel/s.html#SAL and http://www.penguin.cz/~literakl/intel/i.html#IMUL we get an idea of x86 clock cycles needed for arithmetic shift and multiplication. Say we stick to "486" (the newest one list...
What is the overhead of creating a new HttpClient per call in a WebAPI client?
...eck out the WebAPI Guidance page for documentation and example at
https://www.asp.net/web-api/overview/advanced/calling-a-web-api-from-a-net-client
Pay special attention to this call-out:
HttpClient is intended to be instantiated once and re-used throughout the life of an application. Especial...
keytool error :java.io.IoException:Incorrect AVA format
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Probably you entered illegal character(something like ,(comma)) in a field for Name, Organization or somewhere else.
Of course if you really want some charachter can be escaped with \ sign
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Tool to read and display Java .class versions
...ou know of a tool that will search for .class files and then display their compiled versions?
9 Answers
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find() with nil when there are no records
... This has changed in rails 4, see this answer stackoverflow.com/a/26885027/1438478 for the new way to find an item by a specific attribute.
– Fralcon
Mar 26 '15 at 20:58
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Summarizing multiple columns with dplyr? [duplicate]
...38 2.873786
#> 3: 3 2.854701 2.948718 2.951567 3.062678
Let's try to compare performance.
library(dplyr)
library(purrrlyr)
library(data.table)
library(bench)
set.seed(123)
n <- 10000
df <- data.frame(
a = sample(1:5, n, replace = TRUE),
b = sample(1:5, n, replace = TRUE),
c = sam...
How to get last items of a list in Python?
...th=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4...
scp with port number specified
...n a few times, setup/create a ~/.ssh/config file with an entry like:
Host www.myserver.com
Port 80
or
Host myserver myserver80 short any.name.u.want yes_anything well-within-reason
HostName www.myserver.com
Port 80
User username
Then you can use:
scp username@www.myserver.com:...