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How to remove a column from an existing table?
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If this column is referenced by other tables then you need to figure out what to do with other tables/columns. One option is to remove foreign keys and keep referenced data in other tables.
Another option is to find all referencing columns and remove them as well if they are not needed any longer...
Safely remove migration In Laravel
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He hasn't run the migration, though. You can't roll back what you didn't actually do, can you?
– Stephane
Jun 1 '13 at 14:22
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How do I hide javascript code in a webpage?
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@Quentin - your view-source URL is silly - that's not what's being asked or proposed here. Any person can view the code. I've said that as much as anyone else. The question is only how easy it is and, per the specific question asked, how visible it is when someone does View S...
SQL query to get all values a enum can have
...pe of the returned records in the above query will be myenum. Depending on what you are doing, you may need to cast to text. e.g.
SELECT unnest(enum_range(NULL::myenum))::text
If you want to specify the column name, you can append AS my_col_name.
Credit to Justin Ohms for pointing out some a...
Difference between jQuery’s .hide() and setting CSS to display: none
...oing? .hide() is quicker than writing out .css("display", "none") , but what’s the difference and what are both of them actually doing to the HTML element?
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How do I analyze a .hprof file?
...e Memory Analyzer project at Eclipse, contributed to them by SAP.
Some of what you can do is mind-blowingly good for finding memory leaks etc -- including running a form of limited SQL (OQL) against the in-memory objects, i.e.
SELECT toString(firstName) FROM com.yourcompany.somepackage.User
T...
Get all related Django model objects
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@digitalPBK was close... here is probably what you are looking for using Django's built-in stuff that is used in Django admin for displaying related objects during deletion
from django.contrib.admin.utils import NestedObjects
collector = NestedObjects(using="default...
Create a new database with MySQL Workbench
...ed. You can have several different database instances that share a schema. What Edward said ("the terms 'Schema' and 'database' are synonymous in this program") is also true. Oracle decided to use the word schema when they meant database because they hate their users and want to make us suffer.
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One Activity and all other Fragments [closed]
...ity to see if data has been selected and should be displayed to the user.
What Aravind says about being stuck to a single Activity type is also true but not really that limiting. Your activity would be a FragmentActivity and as long as you don't need a MapView then there are no real limitations. ...
Clojure: cons (seq) vs. conj (list)
...ous in the study of programming languages and their implementation; that's what's meant when "avoiding consing" is mentioned.
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