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Measure elapsed time in Swift
...erence in nano seconds (UInt64)
let timeInterval = Double(nanoTime) / 1_000_000_000 // Technically could overflow for long running tests
print("Time to evaluate problem \(problemNumber): \(timeInterval) seconds")
return theAnswer
}
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For Swift 1 and 2, my function uses NSDate...
Explain Morris inorder tree traversal without using stacks or recursion
... / \
(Y) Z
/ \
C D
(Y) above refers to Y and all of its children, which are omitted for recursion issues. The important part is listed anyway.
Now that the tree has a link back to X, the traversal continues...
A
\
Y
/ \
(A) B
\
X
/ \
(Y)...
Best way to create an empty object in JSON with PHP?
To create an empty JSON object I do usually use:
7 Answers
7
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Ant task to run an Ant target only if a file exists?
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Check Using Filename filters like DB_*/**/*.sql
Here is a variation to perform an action if one or more files exist corresponding to a wildcard filter. That is, you don't know the exact name of the file.
Here, we are looking for "*.sql" files in any sub-dire...
How do I change the IntelliJ IDEA default JDK?
...I want IntelliJ IDEA to reflect changes of JAVA_HOME sys variable automatically.
– Ivan_Bereziuk
Nov 16 '17 at 10:48
1
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fatal error LNK1112: module machine type 'x64' conflicts with target machine type 'X86'
...tform, for the insufficiency of cuda. I think the library files linked are all compiled on the x86 platform, but when I compile it, I get the error message "fatal error LNK1112: module machine type 'x64' conflicts with target machine type 'X86'".
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Why do people write the #!/usr/bin/env python shebang on the first line of a Python script?
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If you have several versions of Python installed, /usr/bin/env will ensure the interpreter used is the first one on your environment's $PATH. The alternative would be to hardcode something like #!/usr/bin/python; that's ok, but less flexible.
In Unix, an executable f...
TemplateDoesNotExist - Django Error
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Make sure you have rest_framework listed in your settings.py INSTALLED_APPS.
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Wait for a process to finish
... Note that lsof uses polling, that +r 1 is the timeout, I am personally looking for a solution for MacOS that does not use polling.
– Alexander Mills
Feb 28 '18 at 16:58
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WARNING: Can't verify CSRF token authenticity rails
... that you have <%= csrf_meta_tag %> in your layout
Add beforeSend to all the ajax request to set the header like below:
$.ajax({ url: 'YOUR URL HERE',
type: 'POST',
beforeSend: function(xhr) {xhr.setRequestHeader('X-CSRF-Token', $('meta[name="csrf-token"]').attr('content'))},
data: '...