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How to add multiple columns to a table in Postgres?
...R TABLE table ADD COLUMN col1 int default 0, ADD COLUMN col2 text default 'foo';
– Brian D
Feb 11 at 15:36
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When to use Comparable and Comparator
... | Comparable | Comparator
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Is used to allow Collections.sort to work | yes | yes
Can compare multiple fields | yes ...
What is :: (double colon) in Python when subscripting sequences?
... @UmarAsghar n means start. so the list start from nth index. Basically, [start:stop:step]
– harryghgim
Sep 1 at 11:42
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How do I upload a file with metadata using a REST web service?
...at I wanted to do. Unfortunately, due to a weird business rule, we have to allow the upload to occur in any order (metadata first or file first). I was wondering if there was a way to combine the two in order to save the headache of dealing with both situations.
– Daniel T.
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How to list only the file names that changed between two commits?
...ion may help you, I'm not sure. Otherwise there's always | erep -v '(.tmp|.foo|.dontwant)$' ...
– artfulrobot
Oct 15 '14 at 15:08
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Node.js app can't run on port 80 even though there's no other process blocking the port
I'm running an instance of Debian on Amazon EC2 with Node.js installed. If I run the code below:
9 Answers
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jQuery selector regular expressions
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James Padolsey created a wonderful filter that allows regex to be used for selection.
Say you have the following div:
<div class="asdf">
Padolsey's :regex filter can select it like so:
$("div:regex(class, .*sd.*)")
Also, check the official documentation on se...
What does the “__block” keyword mean?
What exactly does the __block keyword in Objective-C mean? I know it allows you to modify variables within blocks, but I'd like to know...
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Use of var keyword in C#
...Order>, ObservableCollection<Order> or BindingList<Order> - all I want is to keep that list in memory to iterate over it or get its count or something later on.
Contrast the above declaration with:
ObservableCollection<Order> orders = cust.Orders;
To me, the type name is jus...
What is pluginManagement in Maven's pom.xml?
...uginManagement is only a way to share the same plugin configuration across all your project modules.
From Maven documentation:
pluginManagement: is an element that is seen along side plugins. Plugin Management contains plugin elements in much the same way, except that rather than configuring pl...