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Deleting all records in a database table
...ll.
Post.delete_all
or with a criteria
Post.delete_all "person_id = 5 AND (category = 'Something' OR category = 'Else')"
See here for more information.
The records are deleted without loading them first which makes it very fast but will break functionality like counter cache that depends on ...
How to get the body's content of an iframe in Javascript?
...s just one line of native JavaScript.
For me it's the best, easy readable and even afaik the shortest way to get the iframes content.
First get your iframe
var iframe = document.getElementById('id_description_iframe');
// or
var iframe = document.querySelector('#id_description_iframe');
And th...
In Gradle, is there a better way to get Environment Variables?
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In android gradle 0.4.0 you can just do:
println System.env.HOME
classpath com.android.tools.build:gradle-experimental:0.4.0
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Efficient SQL test query or validation query that will work across all (or most) databases
...RE 1=0" - otherwise the call might be very slow. By the way, both SELECT 1 and SELECT 1 FROM DUAL also work with H2.
– Thomas Mueller
Sep 9 '10 at 14:01
2
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Can you use a trailing comma in a JSON object?
...ed to worry about all browsers.
In general I try turn the problem around, and add the comma before the actual value, so you end up with code that looks like this:
s.append("[");
for (i = 0; i < 5; ++i) {
if (i) s.append(","); // add the comma only if this isn't the first entry
s.appendF("\"...
Find all controls in WPF Window by type
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Note: If you're trying to get this to work and finding that your Window (for instance) has 0 visual children, try running this method in the Loaded event handler. If you run it in the constructor (even after InitializeComponent()), the visual children aren't loaded y...
Android: How do I get string from resources using its name?
I would like to have 2 languages for the UI and separate string values for them in my resource file res\values\strings.xml :
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git push local branch with same name as remote tag
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The following command should work.
git push origin refs/heads/product-0.2:refs/heads/product-0.2
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How can you determine how much disk space a particular MySQL table is taking up?
...length) tablesize
FROM information_schema.tables
WHERE table_schema='mydb' and table_name='mytable';
KILOBYTES
SELECT (data_length+index_length)/power(1024,1) tablesize_kb
FROM information_schema.tables
WHERE table_schema='mydb' and table_name='mytable';
MEGABYTES
SELECT (data_length+index_len...
How to make layout with View fill the remaining space?
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Answer from woodshy worked for me, and it is simpler than the answer by Ungureanu Liviu since it does not use RelativeLayout.
I am giving my layout for clarity:
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_conte...