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How to get the difference between two arrays in JavaScript?
... operation, because property lookup is the very own job of Sets, which are orders of magnitude faster then indexOf/includes. Simply put, your solution is very inefficient and rather slow.
– user6445533
Oct 18 '16 at 19:35
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Best way to add “current” class to nav in Rails 3
...d this thoroughly and I'm very new to RoR (moving over after a decade with PHP) so if this has a major flaw I'd love to hear it.
At least this way you only need 1 helper function and a simple call in each link.
share
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Error-Handling in Swift-Language
...or is not throwing at all.
2. Invoking function that may throw errors
In order to invoke function you need to use try keyword, like this
try summonDefaultDragon()
this line should normally be present do-catch block like this
do {
let dragon = try summonDefaultDragon()
} catch DragonError....
How do I change selected value of select2 dropdown with JqGrid?
...for then set the selectbox value.
Notice from the docs
Notice that in order to use this method you must define the
initSelection function in the options so Select2 knows how to
transform the id of the object you pass in val() to the full object it
needs to render selection. If you are att...
Operator precedence with Javascript Ternary operator
...ach type of operator in a language is evaluated in a particular predefined order (and not just left-to-right).
Reference: Javascript Operator Precedence
How to change the order of evaluation:
Now we know why it fails, you need to know how to make it work.
Some other answers talk about changing t...
Using awk to remove the Byte-order mark
... to true, so each record is printed.
Enjoy!
-- ADDENDUM --
Unicode Byte Order Mark (BOM) FAQ includes the following table listing the exact BOM bytes for each encoding:
Bytes | Encoding Form
--------------------------------------
00 00 FE FF | UTF-32, big-endian
FF FE 00 00 | UTF-...
adb shell command to make Android package uninstall dialog appear
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How to check if there exists a process with a given pid in Python?
...t an OSError due to permissions, even if the pid exists in the system.
In order to bypass this limitation you can check if /proc/<pid> exists:
import os
def is_running(pid):
if os.path.isdir('/proc/{}'.format(pid)):
return True
return False
This applies to linux based syst...
Convert JSON string to dict using Python
...
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How do I strip non alphanumeric characters from a string and keep spaces?
...
In this case I would use the bang method (gsub! instead of gsub) in order to clean the input permanently.
#permanently filter all non-alphanumeric characters, except _
@search_query.gsub!(/\W/,'')
This avoids a situation where @seach_query is used elsewhere in the code without cleaning it...