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How to query SOLR for empty fields?
I have a large solr index, and I have noticed some fields are not updated correctly (the index is dynamic).
7 Answers
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What is causing ERROR: there is no unique constraint matching given keys for referenced table?
Below example table structure gives an ERROR: there is no unique constraint matching given keys for referenced table, and having stared at it for while now I can't figure out why this error arises in this situation.
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Serializing with Jackson (JSON) - getting “No serializer found”?
...eption when trying to serialize a very simple object using Jackson. The error:
18 Answers
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Making heatmap from pandas DataFrame
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You want matplotlib.pcolor:
import numpy as np
from pandas import DataFrame
import matplotlib.pyplot as plt
index = ['aaa', 'bbb', 'ccc', 'ddd', 'eee']
columns = ['A', 'B', 'C', 'D']
df = DataFrame(abs(np.random.randn(5, 4)), index=index, columns=...
How do I ignore the authenticity token for specific actions in Rails?
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In Rails 4:
skip_before_action :verify_authenticity_token, except: [:create, :update, :destroy]
And Rails 3:
skip_before_filter :verify_authenticity_token
For previous versions:
For individual actions, you can do:
protect_from_forgery :...
How can I use a C++ library from node.js?
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Look at node-ffi.
node-ffi is a Node.js addon for loading and calling dynamic libraries using pure JavaScript. It can be used to create bindings to native libraries without writing any C++ code.
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What are differences between AssemblyVersion, AssemblyFileVersion and AssemblyInformationalVersion?
...tributes. What are differences? Is it ok if I use AssemblyVersion and ignore the rest?
7 Answers
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How to order events bound with jQuery
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I had been trying for ages to generalize this kind of process, but in my case I was only concerned with the order of first event listener in the chain.
If it's of any use, here is my jQuery plugin that binds an event listener that is always t...
Unicode character in PHP string
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Because JSON directly supports the \uxxxx syntax the first thing that comes into my mind is:
$unicodeChar = '\u1000';
echo json_decode('"'.$unicodeChar.'"');
Another option would be to use mb_convert_encoding()
echo mb_convert_encoding('&#x100...
Get Context in a Service
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I had this problem, but it turned out that it was the worker thread that had no context. I solved it my passing a context when constructing the thread.
– ctrl-alt-delor
Jan 31 '13 at 9:19
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