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How do I calculate square root in Python?
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how to solve “ruby installation is missing psych” error?
I used rvm to install ruby 1.9.3. even though it was successfully installed, it complained about libyaml. and now every time i wanna install a gem (say rails) this warning shows up:
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Convert a 1D array to a 2D array in numpy
I want to convert a 1-dimensional array into a 2-dimensional array by specifying the number of columns in the 2D array. Something that would work like this:
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How to add new item to hash
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Create the hash:
hash = {:item1 => 1}
Add a new item to it:
hash[:item2] = 2
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How can I get query string values in JavaScript?
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Asterisk in function call
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182
* is the "splat" operator: It takes a list as input, and expands it into actual positional arg...
How to access cookies in AngularJS?
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<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.2.19/angular.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.2.19/angular-cookies.js"></script>
<script>
angular.module('myApp', ['ngCookies']);
app.controller('...
How to avoid scientific notation for large numbers in JavaScript?
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115
There's Number.toFixed, but it uses scientific notation if the number is >= 1e21 and has a ...
How to get multiple counts with one SQL query?
...stributor_id,
count(*) AS total,
sum(case when level = 'exec' then 1 else 0 end) AS ExecCount,
sum(case when level = 'personal' then 1 else 0 end) AS PersonalCount
FROM yourtable
GROUP BY distributor_id
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Validate that a string is a positive integer
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