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How do I find the duplicates in a list and create another list with them?

... @Hugo, to see the list of duplicates, we just need to create a new list called dup and add an else statement. For example: dup = [] else: dup.append(x) – Chris Nielsen Apr 29 '16 at 16:45 ...
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Remove duplicates from an array of objects in JavaScript

...) dot notation. Yours is ES5 syntax. The others are mostly ES6 (ECMA2015). All are valid in 2017. See jaredwilli's comment. – agm1984 Nov 15 '17 at 9:20 ...
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Search for executable files using find command

... @sourcejedi Thanks. I was actually only talking about non-GNU versions of find (BSD, in particular) but older versions of GNU find actually did support that syntax too. In newer versions you'll have to use / instead of +. See the updated answer for more d...
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Why use strict and warnings?

...tify how much it helps. It should suffice to say that they help unconditionally. – ikegami Nov 6 '11 at 19:42 1 ...
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How do I get a list of column names from a psycopg2 cursor?

... to generate column labels directly from the selected column names, and recall seeing that python's psycopg2 module supports this feature. ...
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Ruby replace string with captured regex pattern

...d answer first without reading the entirety of answers. That seems to generally be the most efficient means of fixing a problem. Give Vicky a break! :) – Josh M. Jan 31 '14 at 3:43 ...
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Rails layouts per action?

...th this is that you cannot access objects such as current_user to conditionally determine the layout – Andrew K Dec 14 '14 at 5:25 ...
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How can i query for null values in entity framework?

...g this bug! For backwards compatibility, it will be opt-in - you need manually enable a setting to make entry == value work. No word yet on what this setting is. Stay tuned! Edit 2: According to this post by the EF team, this issue has been fixed in EF6! Woohoo! We changed the default be...
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RE error: illegal byte sequence on Mac OS X

...t a valid UTF-8 char. Note that, by contrast, GNU sed (Linux, but also installable on macOS) simply passes the invalid byte through, without reporting an error. Using the formerly accepted answer is an option if you don't mind losing support for your true locale (if you're on a US system and you ne...
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How to efficiently count the number of keys/properties of an object in JavaScript?

...t only iterates through the object but also creates a whole new array with all its keys, so it completely fails at answering the question. – GetFree Jun 22 '12 at 14:28 43 ...