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How to understand nil vs. empty vs. blank in Ruby
... object and is true if the object is nil.
.empty? can be used on strings, arrays and hashes and returns true if:
String length == 0
Array length == 0
Hash length == 0
Running .empty? on something that is nil will throw a NoMethodError.
That is where .blank? comes in. It is implemented by Rails...
How to prevent XSS with HTML/PHP?
...ling your own or if there's some XSS concern, we can leverage filter_input_array (available in PHP 5 >= 5.2.0, PHP 7.)
I typically will add this snippet to my SessionController, because all calls go through there before any other controller interacts with the data. In this manner, all user input...
PHP foreach change original array values
I am very new in multi dimensional arrays, and this is bugging me big time.
5 Answers
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range over interface{} which stores a slice
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This will not work over an array though, only over a slice
– user1028741
Jan 15 at 11:16
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How do HashTables deal with collisions?
... the first option, is there any reason a linked list is used instead of an array or even a binary search tree?
– user142019
May 5 '13 at 5:28
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Gets byte array from a ByteBuffer in java
...d note that bb.capacity() might equal bb.remaining() even when the backing array is longer, so you must not use their equality as a test of when bb.array() is correct. See ByteBuffer.slice().
– cdunn2001
Sep 26 '12 at 0:01
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Rails filtering array of objects by attribute value
So I perform a query to the db and I have a complete array of objects:
5 Answers
5
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How can I reverse a list in Python?
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You can make use of the reversed function for this as:
>>> array=[0,10,20,40]
>>> for i in reversed(array):
... print(i)
Note that reversed(...) does not return a list. You can get a reversed list using list(reversed(array)).
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What does the “@” symbol do in Powershell?
I've seen the @ symbol used in PowerShell to initialise arrays. What exactly does the @ symbol denote and where can I read more about it?
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Peak detection in a 2D array
...s for the tip on how to detect local maxima/peaks across multi-dimensional arrays!
– Milind R
Jul 20 at 3:50
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