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Rails: Missing host to link to! Please provide :host parameter or set default_url_options[:host]
...g.action_mailer.default_url_options = { :host => "dev.yourhost.com" }
test.rb
config.action_mailer.default_url_options = { :host => "test.yourhost.com" }
production.rb
config.action_mailer.default_url_options = { :host => "www.yourhost.com" }
...
Why does javascript map function return undefined?
...an implement like a below logic.
Suppose you want an array of values.
let test = [ {name:'test',lastname:'kumar',age:30},
{name:'test',lastname:'kumar',age:30},
{name:'test3',lastname:'kumar',age:47},
{name:'test',lastname:'kumar',age:28},
{name:'...
搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...集测试文件夹
#存放整个mongodb文件
mkdir -p /data/mongodbtest/replset
#存放mongodb数据文件
mkdir -p /data/mongodbtest/replset/data
#进入mongodb文件夹
cd /data/mongodbtest
3、下载mongodb的安装程序包
wget http://fastdl.mongodb.org/linux/mongodb-li...
Write a number with two decimal places SQL server
...
This is how the kids are doing it today:
DECLARE @test DECIMAL(18,6) = 123.456789
SELECT FORMAT(@test, '##.##')
123.46
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Bash: Syntax error: redirection unexpected
...t in a variable. then use heredoc. for example:
nc -l -p 80 <<< "tested like a charm";
can be written like:
nc -l -p 80 <<EOF
tested like a charm
EOF
and like this (this is what you want):
text="tested like a charm"
nc -l -p 80 <<EOF
$text
EOF
Practical example in busyb...
Copy values from one column to another in the same table
...
Short answer for the code in question is:
UPDATE `table` SET test=number
Here table is the table name and it's surrounded by grave accent (aka back-ticks `) as this is MySQL convention to escape keywords (and TABLE is a keyword in that case).
BEWARE, that this is pretty dangerous qu...
Check whether a path is valid in Python without creating a file at the path's target
I have a path (including directory and file name).
I need to test if the file-name is a valid, e.g. if the file-system will allow me to create a file with such a name.
The file-name has some unicode characters in it.
...
How do you avoid over-populating the PATH Environment Variable in Windows?
...y would be expanded prior to being stored. This may be true and I have not tested for it. Another option though is to use 8dot3 forms for longer directory names, for example C:\Program Files is typically equivalent to C:\PROGRA~1. You can use dir /x to see the shorter names.
EDIT 3: This simple tes...
Enabling WiFi on Android Emulator
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I want to test VNC server on emulator and vnc server app requires Wifi or USB to get connect to network? then what is the best solution ?
– mfq
Sep 12 '13 at 14:18
...
Regular expression to match any character being repeated more than 10 times
...
The regex you need is /(.)\1{9,}/.
Test:
#!perl
use warnings;
use strict;
my $regex = qr/(.)\1{9,}/;
print "NO" if "abcdefghijklmno" =~ $regex;
print "YES" if "------------------------" =~ $regex;
print "YES" if "========================" =~ $regex;
Here th...