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Heroku/devise - Missing host to link to! Please provide :host parameter or set default_url_options[:
... sarnold
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answered Nov 6 '10 at 19:46
thenengahthenengah
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Serializing an object to JSON
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answered Feb 17 '09 at 20:16
Mike_GMike_G
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How does Rails keep track of which migrations have run for a database?
... row from schema_migrations.
For example, running a migration file named 20120620193144_create_users.rb will insert a new row with a version of 20120620193144 into the schema_migrations table.
You are free at any point to introduce migrations with earlier versions. Rails will always run any new mi...
how to make svn diff show only non-whitespace line changes between two revisions
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You can use
svn diff -r 100:200 -x -b > file.diff
If you want to ignore all whitespaces:
svn diff -x -w | less
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Strip Leading and Trailing Spaces From Java String
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603
You can try the trim() method.
String newString = oldString.trim();
Take a look at javadocs
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Drop a temporary table if it exists
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200
From SQL Server 2016 you can just use
DROP TABLE IF EXISTS ##CLIENTS_KEYWORD
On previous ve...
Getting number of elements in an iterator in Python
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101
No. It's not possible.
Example:
import random
def gen(n):
for i in xrange(n):
if...
Python - use list as function parameters
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edited Jun 18 '15 at 21:03
answered Apr 16 '13 at 18:04
M...
Resolving conflicts: how to accept “their” changes automatically?
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answered Mar 21 '13 at 11:10
NofflsNoffls
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What is a Context Free Grammar?
...le of a formal language is the set of all binary strings of length three, {000, 001, 010, 011, 100, 101, 110, 111}.
Grammars work by defining transformations you can make to construct a string in the language described by a grammar. Grammars will say how to transform a start symbol (usually S) into...