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Create an empty object in JavaScript with {} or new Object()?
...n var arr = []; arr[x-1] = undefined;
For benchmarks click the following: https://jsfiddle.net/basickarl/ktbbry5b/
I do not however know the memory footprint of both, I can imagine that new Array() takes up more space.
How do I check for C++11 support?
...ay to check features, including C++11 features. A comprehensive page is at https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations
In summary, each feature has a standard macro defined that you can check with #ifdef. For example, to check for user defined literals, you can ...
What's the correct way to convert bytes to a hex string in Python 3?
...xde\xad\xbe\xef'
works also with the mutable bytearray type.
Reference: https://docs.python.org/3/library/stdtypes.html#bytes.hex
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'const int' vs. 'int const' as function parameters in C++ and C
...s a pointer to an int that cannot be changed to point to another int.
See https://isocpp.org/wiki/faq/const-correctness#const-ptr-vs-ptr-const.
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Convert a String representation of a Dictionary to a dictionary?
...
https://docs.python.org/3.8/library/json.html
JSON can solve this problem though its decoder wants double quotes around keys and values. If you don't mind a replace hack...
import json
s = "{'muffin' : 'lolz', 'foo' : 'kit...
Building a complete online payment gateway like Paypal [closed]
...ng through them to the acquiring bank, from dialup 9600 baud modems, ISDN, HTTPS, VPN or dedicated line. Ultimately the authorisation request will be converted to X25 protocol, which is the protocol used by these acquiring banks when communicating with each other.
In summary then: it all depends o...
How do I return to an older version of our code in Subversion?
...e it backwards. It works in my end.
For instance:
svn merge -r 5616:5612 https://<your_svn_repository>/
It would contain a merged code back to former revision, then you could commit it.
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Can you determine if Chrome is in incognito mode via a script?
...Chrome: *
Yes. The FileSystem API is disabled in incognito mode. Check out https://jsfiddle.net/w49x9f1a/ when you are and aren't in incognito mode.
Sample code:
var fs = window.RequestFileSystem || window.webkitRequestFileSystem;
if (!fs) {
console.log("check failed?");
} else...
Fixed Table Cell Width
...able> or the tables css class and set the overflow style for the cells
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/col
<table class="fixed">
<col width="20px" />
<col width="30px" />
<col width="40px" />
<tr>
<td>text<...
What is the best way to test for an empty string in Go?
...different code, but barely anyone uses it so I wouldn't worry about that.
https://godbolt.org/z/fib1x1
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