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are there dictionaries in javascript like python?
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If the value comes from the user, then care needs to be taken to use Object.hasOwnProperty.call(dictionary, key) (otherwise the user can enter a value of valueOf and dictionary['valueOf'] returns the Object.valueOf() function belonging to the O...
Unit testing private methods in C#
...ehind black box programming and encapsulation is to hide technical details from the subscriber. So it is indeed necessary to have non-trivial private methods and properties in your code. And if it's non-trivial, it needs to be tested.
– AxD
Aug 25 '16 at 23:48
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What is Cache-Control: private?
...e in the same 15-second window will all get the same contents - all served from close cache. Performance win for everyone.
The virtue of adding Cache-Control: max-age is that the browser doesn't even have to perform a conditional request.
if you specified only Last-Modified, the browser has to pe...
Is Python interpreted, or compiled, or both?
From my understanding:
11 Answers
11
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Why does this loop produce “warning: iteration 3u invokes undefined behavior” and output more than 4
... note
We know that the standard says undefined behavior is unpredictable from the note that come with the definition which says:
[ Note: Undefined behavior may be expected when this International
Standard omits any explicit definition of behavior or when a program
uses an erroneous constru...
How do I install an old version of Django on virtualenv?
...ere : docs.djangoproject.com/en/2.0/releases oddly I didn't find this page from the django doc. replace '2.0' by '2.1' in some months..
– jerome
Mar 3 '18 at 12:27
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'str' object does not support item assignment in Python
I would like to read some characters from a string and put it into other string (Like we do in C).
7 Answers
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How are multi-dimensional arrays formatted in memory?
...ess the array correctly):
warning: passing argument 1 of ‘function1’ from incompatible pointer type
Because a 2D array is not the same as int **. The automatic decaying of an array into a pointer only goes "one level deep" so to speak. You need to declare the function as:
void function2(i...
How can you sort an array without mutating the original array?
...nst sorted = [...arr].sort();
the spread-syntax as array literal (copied from mdn):
var arr = [1, 2, 3];
var arr2 = [...arr]; // like arr.slice()
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_operator
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How do you downgrade rubygems?
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This worked for me when downgrading from 1.5.2 to 1.4.2 because of old rails version:
sudo gem update --system 1.4.2
More information about downgrading/upgrading rubygems: https://github.com/rubygems/rubygems/blob/master/UPGRADING.md
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