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How to drop columns using Rails migration
...ing the migration is possible. From the documentation: The typeand options parameters will be ignored if present. It can be helpful to provide these in a migration's change method so it can be reverted. In that case, type and options will be used by add_column.
– Nicolas
...
How can I open a URL in Android's web browser from my application?
... from Android Developer.
/**
* Open a web page of a specified URL
*
* @param url URL to open
*/
public void openWebPage(String url) {
Uri webpage = Uri.parse(url);
Intent intent = new Intent(Intent.ACTION_VIEW, webpage);
if (intent.resolveActivity(getPackageManager()) != null) {
...
How to write a test which expects an Error to be thrown in Jasmine?
... it remains consistent among all tests when, for example, you have to pass parameters to the target function to make it throw.
– Beez
Aug 8 '14 at 14:15
10
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How do I filter query objects by date range in Django?
...queryset(self, request, queryset, view):
predicate = request.query_params # or request.data for POST
if predicate.get('from_date', None) is not None and predicate.get('to_date', None) is not None:
queryset = queryset.filter(your_date__range=(predicate['from_date'], predi...
Calling a static method on a generic type parameter
...ethodOnSomeBaseClassThatReturnsCollection
Going through the generic type parameter is an unneeded indirection and hence not supported.
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Strangest language feature
...ace and time performance by caching
* frequently requested values.
*
* @param i an <code>int</code> value.
* @return a <tt>Integer</tt> instance representing <tt>i</tt>.
* @since 1.5
*/
public static Integer valueOf(int i) {
if (i >= -128 &&...
don't fail jenkins build if execute shell fails
...n your case is your git command exit with 1, and because of the default -e param, the shell picks up the non-0 exit code, ignores the rest of the script and marks the step as a failure. We can confirm this if you can post your build step script here.
If that's the case, you can try to put #!/bin/sh ...
Replace multiple characters in a C# string
... }
public static string ReplaceAny(this string s, char replaceWith, params char[] chars)
{
if (null == chars)
return s;
if (null == s)
return null;
StringBuilder sb = null;
for (int i = 0, count = s.Length; i < count; i++)
...
Get img thumbnails from Vimeo?
...youtube).
Here is my PHP solution:
/**
* Gets a vimeo thumbnail url
* @param mixed $id A vimeo id (ie. 1185346)
* @return thumbnail's url
*/
function getVimeoThumb($id) {
$data = file_get_contents("http://vimeo.com/api/v2/video/$id.json");
$data = json_decode($data);
return $data[0]...
Get the time difference between two datetimes
...
If we want only hh:mm:ss, we can use a function like that:
//param: duration in milliseconds
MillisecondsToTime: function(duration) {
var seconds = parseInt((duration/1000)%60)
, minutes = parseInt((duration/(1000*60))%60)
, hours = parseInt((duration/(1000*60*60))%...