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How to perform element-wise multiplication of two lists?

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Dual emission of constructor symbols

...d name for your Thing::foo() is easily parsed: _Z | N | 5Thing | 3foo | E | v prefix | nested | `Thing` | `foo`| end nested | parameters: `void` You can read the constructor names similarly, as below. Notice how the constructor "name" isn't given, but instead a C clause: _Z |...
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Convert number strings with commas in pandas DataFrame to float

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Why does parseInt yield NaN with Array#map?

... 483 The callback function in Array.map has three parameters: From the same Mozilla page that you li...
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Rails has_and_belongs_to_many migration

...First run your migrations, then edit the generated migration file. Rails 3 rails g migration create_restaurants_users_table Rails 4: rails g migration create_restaurants_users Rails 5 rails g migration CreateJoinTableRestaurantUser restaurants users From the docs: There is also a gene...
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How to hide databases that I am not allowed to access

When I connect to my Heroku - Postgresql database via pgAdmin3 , It lists all the tables (about 2600). Every time I open the pgAdmin3 I have to find my own database. ...
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Ruby Hash to array of values

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How to format all Java files in an Eclipse project at one time?

...root and select Source -> Format. This should work for at least version 3.8.1. and above. If the above does not work, you're probably using an older Eclipse-version. In such case you can select your Source Folders by clicking on them while holding down CTRL, then select Source -> Format from ...
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Human readable javascripts in chrome developer tools

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How to convert a NumPy array to PIL image applying matplotlib colormap

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