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How to hide columns in HTML table?

... You can also hide a column using the col element https://developer.mozilla.org/en/docs/Web/HTML/Element/col To hide the second column in a table: <table> <col /> <col style="visibility:collapse"/> <tr><td>visible</td><td>hid...
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using lodash .groupBy. how to add your own keys for grouped output?

...) => ({ color: key, users: value })) .value() ); <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js"></script> Original Answer var result = _.chain(data) .groupBy("color") .pairs() .map(function(currentItem) { retur...
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Python csv string to array

... The official doc for csv.reader() https://docs.python.org/2/library/csv.html is very helpful, which says file objects and list objects are both suitable import csv text = """1,2,3 a,b,c d,e,f""" lines = text.splitlines() reader = csv.reader(lines, d...
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Python element-wise tuple operations like sum

...2,3] ) b = array( [3,2,1] ) print a + b gives array([4,4,4]). See http://www.scipy.org/Tentative_NumPy_Tutorial share | improve this answer | follow | ...
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How to assign bean's property an Enum value in Spring config file?

... Using SPEL and P-NAMESPACE: <beans... xmlns:p="http://www.springframework.org/schema/p" ...> .. <bean name="someName" class="my.pkg.classes" p:type="#{T(my.pkg.types.MyEnumType).TYPE1}"/> s...
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PostgreSQL error 'Could not connect to server: No such file or directory'

...probably /usr/local/var/postgres/ remove this and start server. Check - https://github.com/mperham/lunchy is a great wrapper for launchctl. share | improve this answer | f...
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All Ruby tests raising: undefined method `authenticate' for nil:NilClass

...ehh You need to create a spec/support/devise.rb file as specified here https://github.com/plataformatec/devise#test-helpers to include the devise test helpers #ruby Thanks once again. share | ...
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Recursion in Angular directives

... a better/cleaner solution for a recursive directive. You can find it here https://jsfiddle.net/cattails27/5j5au76c/. It supports as far is 1.3.x. angular.element(document).ready(function() { angular.module('mainApp', []) .controller('mainCtrl', mainCtrl) .directive('recurv', recur...
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AWS ssh access 'Permission denied (publickey)' issue [closed]

...es I've used only have the root user created by default. See also: http://www.youtube.com/watch?v=WBro0TEAd7g share | improve this answer | follow | ...
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What are the security risks of setting Access-Control-Allow-Origin?

...and TLS client certificates. Eg: Data protected by cookies is safe Imagine https://example.com/users-private-data, which may expose private data depending on the user's logged in state. This state uses a session cookie. It's safe to add Access-Control-Allow-Origin: * to this resource, as this header...