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How to create a directory if it doesn't exist using Node.js?
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In practice, what are the main uses for the new “yield from” syntax in Python 3.3?
...rapper(reader())
for i in wrap:
print(i)
# Result
<< 0
<< 1
<< 2
<< 3
Instead of manually iterating over reader(), we can just yield from it.
def reader_wrapper(g):
yield from g
That works, and we eliminated one line of code. And probably the intent is a little ...
apache redirect from non www to www
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512
Using the rewrite engine is a pretty heavyweight way to solve this problem. Here is a simpler s...
How to decide font color in white or black depending on background color?
...ensities. Each 2 digits of the code represent a value in hexadecimal (base-16) notation. I won't get into the details of the conversion here, they're easy to look up.
Once you have the intensities for the individual colors, you can determine the overall intensity of the color and choose the corresp...
How does functools partial do what it does?
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edited Mar 11 '13 at 10:11
answered Mar 11 '13 at 5:35
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“The certificate chain was issued by an authority that is not trusted” when connecting DB in VM Role
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edited Jul 15 '19 at 22:06
Dale K
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What’s the difference between “Array()” and “[]” while declaring a JavaScript array?
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JavaScript checking for null vs. undefined and difference between == and ===
...oercion to try to get the values to match, and === won't. So for instance "1" == 1 is true, because "1" coerces to 1. But "1" === 1 is false, because the types don't match. ("1" !== 1 is true.) The first (real) step of === is "Are the types of the operands the same?" and if the answer is "no", the r...
What are the best practices for JavaScript error handling?
...ise JavaScript Error Handling can be found at http://www.devhands.com/2008/10/javascript-error-handling-and-general-best-practices/
In short it summarizes:
Assume your code will fail
Log errors to the server
You, not the browser, handle errors
Identify where errors might occur
Throw your own erro...
JSON left out Infinity and NaN; JSON status in ECMAScript?
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Infinity and NaN aren't keywords or anything special, they are just properties on the global obj...