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Core Data: Quickest way to delete all instances of an entity
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iOS 9 and later:
iOS 9 added a new class called NSBatchDeleteRequest that allows you to easily delete objects matching a predicate without having to load them all in to memory. Here's how you'd use it:
Swift 5
let fetchReq...
Cookies on localhost with explicit domain
... @Justin: Hm, you probably need to completely omit the Domain= parameter when setting the cookie. If you just set the domain to null or empty, maybe your framework will send the Domain= parameter with that value, instead of omitting it? Check with e.g. Firebug.
– sl...
What's valid and what's not in a URI query?
...ackoverflow.com/questions/2366260/whats-valid-and-whats-not-in-a-uri-query?param=b#1;c#2 a valid query parameter?
– Sumit Jain
Jan 27 at 17:18
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How can I interrupt a ServerSocket accept() method?
...rverSocket object, then starts a new client thread and adds it to a Collection when a new client is accepted.
9 Answers
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Is there a “do … while” loop in Ruby?
...ful. The following is a common idiom to memoize a one-liner method with no params:
def expensive
@expensive ||= 2 + 2
end
Here is an ugly, but quick way to memoize something more complex:
def expensive
@expensive ||=
begin
n = 99
buf = ""
begin
buf << "#{n} ...
How to delete last character from a string using jQuery?
...lso try this in plain javascript
"1234".slice(0,-1)
the negative second parameter is an offset from the last character, so you can use -2 to remove last 2 characters etc
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What are Unwind segues for and how do you use them?
iOS 6 and Xcode 4.5 has a new feature referred to as "Unwind Segue":
6 Answers
6
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python-pandas and databases like mysql
The documentation for Pandas has numerous examples of best practices for working with data stored in various formats.
13 An...
Why am I getting error for apple-touch-icon-precomposed.png
...from the root directory of the site. I first thought it was a misconfiguration of the mobile theme and plugin, but found out later that Apple devices make those requests if the device owner adds the site to it.
Source: Why Webmasters Should Analyze Their 404 Error Log (Mar 2012; by Martin Brinkman...
Simplest code for array intersection in javascript
...vely finds the intersection of
* two arrays in a simple fashion.
*
* PARAMS
* a - first array, must already be sorted
* b - second array, must already be sorted
*
* NOTES
* State of input arrays is undefined when
* the function returns. They should be
* (prolly) be dumped.
*
* ...