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How to add multiple columns to a table in Postgres?
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You might want to reference the docs for posterity, ALTER TABLE [ ONLY ] name [ * ] action [, ... ], postgresql.org/docs/current/static/sql-altertable.html
– mu is too short
Mar 10 '11 at 18:23
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How to find index of list item in Swift?
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As swift is in some regards more functional than object-oriented (and Arrays are structs, not objects), use the function "find" to operate on the array, which returns an optional value, so be prepared to handle a nil value:
let arr:Array = ["a","b","c"]...
How can I wrap or break long text/word in a fixed width span?
...asdfadsfasdfasddkgjk</span> , a long string of non-spaced text, the word(s) break or wrap to next line.
7 Answers
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Java equivalent of C#'s verbatim strings with @
... i love c# 6 with @"string" and $"string{i}" and very futures more than java
– Guido Mocha
May 11 '17 at 7:39
5
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Activate a virtualenv via fabric as deploy user
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Right now, you can do what I do, which is kludgy but works perfectly well* (this usage assumes you're using virtualenvwrapper -- which you should be -- but you can easily substitute in the rather longer 'source' call you mentioned, if not):
def task():
workon = 'workon myve...
Generate full SQL script from EF 5 Code First Migrations
How do I use Entity Framework 5 Code First Migrations to create a full database script from the initial (empty) state to the latest migration?
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Finding Key associated with max Value in a Java Map
...bering both the "currently known maximum" and the key associated with it. (Or just the entry containing both, of course.)
For example:
Map.Entry<Foo, Bar> maxEntry = null;
for (Map.Entry<Foo, Bar> entry : map.entrySet())
{
if (maxEntry == null || entry.getValue().compareTo(maxEntr...
Getting the parent div of element
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You're looking for parentNode, which Element inherits from Node:
parentDiv = pDoc.parentNode;
Handy References:
DOM2 Core specification - well-supported by all major browsers
DOM2 HTML specification - bindings between the DOM and HTML
D...
Find the IP address of the client in an SSH session
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Check if there is an environment variable called:
$SSH_CLIENT
OR
$SSH_CONNECTION
(or any other environment variables) which gets set when the user logs in. Then process it using the user login script.
Extract the IP:
$ echo $SSH_CLIENT | awk '{ print $1}'
1.2.3.4
$ echo $SSH_CONNEC...
How to catch integer(0)?
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That is R's way of printing a zero length vector (an integer one), so you could test for a being of length 0:
R> length(a)
[1] 0
It might be worth rethinking the strategy you are using to identify which elements you want, but without further specific details it is ...