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Writing a Python list of lists to a csv file
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edited Jun 26 '19 at 12:45
bucky
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answered Dec 26 '12 at 7:46
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What is the difference between map and flatMap and a good use case for each?
... values from those that return a Some:
val rdd = sc.parallelize(Seq(1,2,3,4))
def myfn(x: Int): Option[Int] = if (x <= 2) Some(x * 10) else None
rdd.flatMap(myfn).collect
res3: Array[Int] = Array(10,20)
(noting here that an Option behaves rather like a list that has either one element, ...
How do I ZIP a file in C#, using no 3rd-party APIs?
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edited Mar 24 '11 at 13:03
adrianbanks
74.8k1919 gold badges162162 silver badges195195 bronze badges
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How to delete all the rows in a table using Eloquent?
...objects.
You can make use of the truncate method, this works for Laravel 4 and 5:
MyModel::truncate();
That drops all rows from the table without logging individual row deletions.
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impro...
How do I remove a property from a JavaScript object?
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46 Answers
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How to convert a char to a String?
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647
You can use Character.toString(char). Note that this method simply returns a call to String.val...
QuotaExceededError: Dom exception 22: An attempt was made to add something to storage that exceeded
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374
This can occur when Safari is in private mode browsing. While in private browsing, local storage...
An error occurred while installing pg (0.17.1), and Bundler cannot continue
I just installed Rails 4.0.2 and when creating a new app, in the bundle stage I get:
16 Answers
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Named capturing groups in JavaScript regex?
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141
ECMAScript 2018 introduces named capturing groups into JavaScript regexes.
Example:
const a...
How to escape indicator characters (i.e. : or - ) in YAML
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244
Quotes:
"url: http://www.example-site.com/"
To clarify, I meant “quote the value” and or...