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Difference between string and text in rails?
...ule of thumb, use :string for short text input (username, email, password, titles, etc.) and use :text for longer expected input such as descriptions, comment content, etc.
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Create table (structure) from existing table
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If you want to copy the entire structure, you need to generate a Create Script of the table. You can use that script to create a new table with the same structure. You can then also dump the data into the new table if you need to.
If you are using Enterprise Manager, just right-click the table ...
Query EC2 tags from within instance
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The following bash script returns the Name of your current ec2 instance (the value of the "Name" tag). Modify TAG_NAME to your specific case.
TAG_NAME="Name"
INSTANCE_ID="`wget -qO- http://instance-data/latest/meta-data/instance-id`"
REGION="`...
How to perform a real time search and filter on a HTML table
...nges to work with <thead> and <tbody> tags? I've included the script and html from the jsfiddle link, changing the #id, but I get no filtering.
– JoshP
May 31 '13 at 20:22
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Why does Eclipse automatically add appcompat v7 library support whenever I create a new project?
...orderInCategory="100"
android:showAsAction="never"
android:title="@string/action_settings"/>
</menu>
Finally change your MainActivity.java like these:
import android.app.Activity;
import android.os.Bundle;
public class MainActivity extends Activity {
@Override
...
Is there a command like “watch” or “inotifywait” on the Mac?
I want to watch a folder on my Mac (Snow Leopard) and then execute a script (giving it the filename of what was just moved into a folder (as a parameter... x.sh "filename")).
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How to implement the Android ActionBar back button?
....example.myfirstapp.DisplayMessageActivity"
android:label="@string/title_activity_display_message"
android:parentActivityName="com.example.myfirstapp.MainActivity" >
<!-- The meta-data element is needed for versions lower than 4.1 -->
<meta-data
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How is an overloaded method chosen when a parameter is the literal null value?
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To answer the question in the title: null is neither a String nor an Object, but a reference to either can be assigned to null.
I'm actually surprised this code even compiles. I tried something similar previously and I got a compiler error saying that t...
Remove tracking branches no longer on remote
... 57379e4 [origin/bug/1234: gone] Fixed bug
So you can write a simple script to remove local branches that have gone remotes:
git fetch -p && for branch in $(git branch -vv | grep ': gone]' | awk '{print $1}'); do git branch -D $branch; done
Note that the above uses the "porcelain" c...
How could the UNIX sort command sort a very large file?
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WARNING: This script starts one shell per chunk, for really large files, this could be hundreds.
Here is a script I wrote for this purpose. On a 4 processor machine it improved the sort performance by 100% !
#! /bin/ksh
MAX_LINES_PER_...