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In Ruby on Rails, what's the difference between DateTime, Timestamp, Time and Date?
...ith Rails and everything to do with whatever database you're using.
Using MySQL as an example (if for no other reason because it's most popular), you have DATE, DATETIME, TIME and TIMESTAMP column data types; just as you have CHAR, VARCHAR, FLOAT and INTEGER.
So, you ask, what's the difference? We...
scp (secure copy) to ec2 instance without password
... arguments in the wrong order. This works:
scp -i mykey.pem somefile.txt root@my.ec2.id.amazonaws.com:/
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PowerShell Script to Find and Replace for all Files with a Specific Extension
... the equivalent for Set-Content for it to handle files that weren't at the root.
– Matt Whitfield
Sep 28 '19 at 9:41
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How do I get IntelliJ IDEA to display directories?
...r reason why directories may not show up correctly. Make sure the "Content Root" is correct.
Click on the project
Select "File"->"Project Structure"
Select "modules" from the left column, and select a module.
On the sources tab you will see the current "Content Root" along with a button to ad...
千亿时代 网游走到十字路口 - 资讯 - 清泛网 - 专注C/C++及内核技术
...能再缓的端游还能挺多久？手游作为游戏增长最大驱动力如何面临资本降温和淘汰加速的考验？电视游戏（包括主机游戏等）能不能接过力促增长的枪？虚拟现实是噱头还是真正的行业未来？这是个十字路口。
结构性调整
China...
How to ignore xargs commands if stdin input is empty?
...t;#args>, -i, and -I <string>:
ls /empty_dir/ | xargs -n10 chown root # chown executed every 10 args or fewer
ls /empty_dir/ | xargs -L10 chown root # chown executed every 10 lines or fewer
ls /empty_dir/ | xargs -i cp {} {}.bak # every {} is replaced with the args from one input line
ls /...
Permission denied (publickey) when SSH Access to Amazon EC2 instance [closed]
...r admin on some Debians, according to Bogdan Kulbida's answer)(can also be root, fedora, see below)
Trying to connect the wrong host. Is that the right host you are trying to log in to?
Note that 1. will also happen if you have messed up the /home/<username>/.ssh/authorized_keys file on you...
Include headers when using SELECT INTO OUTFILE?
Is it possible to include the headers somehow when using the MySQL INTO OUTFILE ?
18 Answers
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What column type/length should I use for storing a Bcrypt hashed password in a Database?
...spectively.
As you use the 2a format, you’ll need 60 bytes. And thus for MySQL I’ll recommend to use the CHAR(60) BINARYor BINARY(60) (see The _bin and binary Collations for information about the difference).
CHAR is not binary safe and equality does not depend solely on the byte value but on th...
Automatically add all files in a folder to a target using CMake?
...ook at this script
param (
[Parameter(Mandatory=$True)]
[string]$root
)
if (-not (Test-Path -Path $root)) {
throw "Error directory does not exist"
}
#get the full path of the root
$rootDir = get-item -Path $root
$fp=$rootDir.FullName;
$files = Get-ChildItem -Path $root -Recurse -...