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How do short URLs services work?
... is redirected to will see the referrer (the site that you originally come from) as being the site the TinyUrl link is on (i.e., twitter.com, your own site, wherever the link is). This is just as important, so that site owners can see where people are coming from. This too, would not work if a page ...
What is the most efficient way to concatenate N arrays?
...isting of elements to add to the array can be used instead to add elements from one array to the end of another without producing a new array. With slice() it can also be used instead of concat() but there appears to be no performance advantage from doing this.
var a = [1, 2], b = ["x", "y"];
a.pus...
How to exit a function in bash
...
Use:
return [n]
From help return
return: return [n]
Return from a shell function.
Causes a function or sourced script to exit with the return value
specified by N. If N is omitted, the return status is that of the
last command executed wi...
How to make a Java thread wait for another thread's output?
...examples is preferably the object that you need to manipulate concurrently from each thread, or you could create a separate Object for that purpose (I would not recommend making the methods themselves synchronized):
private final Object lock = new Object();
//now use lock in your synchronized bloc...
Renaming a branch while on pull request
...anch and removing the pull request. However, there's nothing stopping you from doing that, pushing a new branch with a new name, and creating a new pull request.
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iOS - Calling App Delegate method from ViewController
...rk some way, but what if I want to use a method like visibleViewController from it? It'll give error like this: Property 'visibleViewController' not found on object of type 'NSObject<UIApplicationDelegate> *. any solution for this?
– mgyky
Nov 20 '18 at 1...
PHP DateTime::modify adding and subtracting months
...8 days in 2010, so PHP auto-corrects this by just continuing to count days from February 1st. You then end up at March 3rd.
How to get what you want:
To get what you want is by: manually checking the next month. Then add the number of days next month has.
I hope you can yourself code this. I am ...
TypeError: 'NoneType' object is not iterable in Python
... Coding Style Guidelines - PEP-008
NoneTypes are Sneaky, and can sneak in from lambdas:
import sys
b = lambda x : sys.stdout.write("k")
for a in b(10):
pass #TypeError: 'NoneType' object is not iterable
NoneType is not a valid keyword:
a = NoneType #NameError: name 'NoneTy...
How do I trim whitespace?
Is there a Python function that will trim whitespace (spaces and tabs) from a string?
15 Answers
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How to round up the result of integer division?
... it once, you don't need to store the recordsPerPage specially if it comes from an expensive function to fetch the value from a config file or something.
I.e. this might be inefficient, if config.fetch_value used a database lookup or something:
int pageCount = (records + config.fetch_value('recor...