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How do I list the functions defined in my shell?
...e#, it appears you must enable extdebug (shopt -s extdebug) AND supply one or more function names to the declare -F command. IOW, declare -F does not supply filenames/line#s even when extdebug is enabled, which is not clear from the documentation, nor is it particularly intuitive, IMO.
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Maven Modules + Building a Single Specific Module
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Any best practices here?
Use the Maven advanced reactor options, more specifically:
-pl, --projects
Build specified reactor projects instead of all projects
-am, --also-make
If project list is specified, also build projects required by the list
So just cd int...
How to vertically center a inside a div? [duplicate]
...niques to accomplish what you want at the end of the discussion.
(Super-short summary: either set the line-height of the child equal to the height of the container, or set positioning on the container and absolutely position the child at top:50% with margin-top:-YYYpx, YYY being half the known heig...
what are the .map files used for in Bootstrap 3.x?
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From Working with CSS preprocessors in Chrome DevTools:
Many developers generate CSS style sheets using a CSS preprocessor, such as Sass, Less, or Stylus. Because the CSS files are generated, editing the CSS files directly is not ...
How to pass arguments and redirect stdin from a file to program run in gdb?
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r is short for run and you can follow it with any arguments. Like in this question, it would be: r arg1 arg2 <file or it could be run arg1 arg2 <file
– phyatt
Jan 24 '17 at 14:45
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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=...
What C++ Smart Pointer Implementations are available?
...f comments about some specific smart pointer implementations so it seemed worth starting a new post.
3 Answers
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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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How do I automatically update a timestamp in PostgreSQL
...,
timestamp timestamp default current_timestamp
)
Note that the value for that column can explicitly be overwritten by supplying a value in the INSERT statement. If you want to prevent that you do need a trigger.
You also need a trigger if you need to update that column whenever the row is upd...