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Group by multiple columns in dplyr, using string vector input
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52
Since this question was posted, dplyr added scoped versions of group_by (documentation here). Th...
How to reverse a 'rails generate'
...alala
rails destroy model yadayada
rails destroy scaffold hohoho
Rails 3.2 adds a new d shortcut to the command, so now you can write:
rails d controller lalala
rails d model yadayada
rails d scaffold hohoho
share
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What is the most robust way to force a UIView to redraw?
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edited May 23 '17 at 10:31
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111 silver badge
answered Oct 1 '09 at 13:02
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Push Notifications in Android Platform
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20 Answers
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JavaScript console.log causes error: “Synchronous XMLHttpRequest on the main thread is deprecated…”
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21 Answers
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Multiple inheritance/prototypes in JavaScript
...et is a function or a constructor.
Example
// Creating objects
var o1, o2, o3,
obj = multiInherit(o1={a:1}, o2={b:2}, o3={a:3, b:3});
// Checking property existences
'a' in obj; // true (inherited from o1)
'b' in obj; // true (inherited from o2)
'c' in obj; // false (not found)
// Sett...
How to format strings using printf() to get equal length in the output?
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You can specify width on string fields, e.g.
printf("%-20s", "initialization...");
and then whatever's printed with that field will be blank-padded to the width you indicate.
The - left-justifies your text in that field.
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How to export a mysql database using Command Prompt?
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edited Mar 23 '15 at 15:56
Adrien Be
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Programmatically Request Access to Contacts
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edited Jun 20 at 9:12
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111 silver badge
answered Sep 29 '12 at 0:38
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Folder structure for a Node.js project
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442
Concerning the folders you mentioned:
/libs is usually used for custom classes/functions/modul...