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Rails DB Migration - How To Drop a Table?
... information about how to accomplish different tasks in a migration here:
http://api.rubyonrails.org/classes/ActiveRecord/Migration.html
More specifically, you can see how to drop a table using the following approach:
drop_table :table_name
...
load scripts asynchronously
...ew adsense ad unit code I noticed the attribute and a search lead me here: http://davidwalsh.name/html5-async
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Getting only response header from HTTP POST using curl
One can request only the headers using HTTP HEAD, as option -I in curl(1) .
8 Answers
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How to find out which processes are using swap space in Linux?
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The best script I found is on this page : http://northernmost.org/blog/find-out-what-is-using-your-swap/
Here's one variant of the script and no root needed:
#!/bin/bash
# Get current swap usage for all running processes
# Erik Ljungstrom 27/05/2011
# Modified by ...
How to find memory leak in a C++ code/project?
...he leak yet allowed - I'm usually seeking it with deleaker (check it here: http://deleaker.com).
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T-SQL Cast versus Convert
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Convert has a style parameter for date to string conversions.
http://msdn.microsoft.com/en-us/library/ms187928.aspx
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How to calculate time elapsed in bash script?
...{a[@]}"
The use of long number of seconds is valid and documented here:
https://www.gnu.org/software/coreutils/manual/html_node/Examples-of-date.html#Examples-of-date
Busybox date
A tool used in smaller devices (a very small executable to install): Busybox.
Either make a link to busybox call...
How does SIGINT relate to the other termination signals such as SIGTERM, SIGQUIT and SIGKILL?
...trl + C.
POSIX 7
POSIX 7 documents the signals with the signal.h header: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/signal.h.html
This page also has the following table of interest which mentions some of the things we had already seen in man 7 signal:
Signal Default Action De...
How do I set a ViewModel on a window in XAML using DataContext property?
...n App.xaml:
<Application
x:Class="BuildAssistantUI.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:BuildAssistantUI.ViewModels"
StartupUri="MainWindow.xaml"
>
&...
NGINX to reverse proxy websockets AND enable SSL (wss://)?
...release 1.3.13. Example of use:
location /websocket/ {
proxy_pass http://backend_host;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_read_timeout 86400;
}
You can also check the nginx changelog and the WebSock...