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Assigning a variable NaN in python without numpy
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Yes -- use math.nan.
>>> from math import nan
>>> print(nan)
nan
>>> print(nan + 2)
nan
>>> nan == nan
False
>>> import math
>>> math.isnan(nan)
True
Before Python 3.5, one could use float("nan") (case insensitive).
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What is the zero for string?
...e
k := NewKey(c, "kind", "", 0, p)
From the specification :
When memory is allocated to store a value, either through a
declaration or a call of make or new, and no explicit initialization
is provided, the memory is given a default initialization. Each
element of such a value is set to ...
What's so bad about in-line CSS?
...always in a separate file, named something like "main.css", "default.css", or "Site.css". However, when I'm coding up a page, I'm often tempted to throw the CSS in-line with a DOM element, such as by setting "float: right" on an image. I get the feeling that this is "bad coding", since it's so rarel...
How can I add a key/value pair to a JavaScript object?
...3";
Using square bracket notation:
obj["key3"] = "value3";
The first form is used when you know the name of the property. The second form is used when the name of the property is dynamically determined. Like in this example:
var getProperty = function (propertyName) {
return obj[propertyNa...
Mediator Vs Observer Object-Oriented Design Patterns
I have been reading the Gang Of Four , in order to solve some of my problems and came across the Mediator pattern.
8 Ans...
What's the absurd function in Data.Void useful for?
...the following signature, where Void is the logically uninhabited type exported by that package:
6 Answers
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What's the difference between a web site and a web application? [closed]
...trying to come up to a difference between a website and a web application for myself. As I see it, a web site points to a specific page and a web application is more of some sort of 'portal' to content and information.
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Debugging “Element is not clickable at point” error
...by following 3 types:
1.The element is not visible to click.
Use Actions or JavascriptExecutor for making it to click.
By Actions:
WebElement element = driver.findElement(By("element_path"));
Actions actions = new Actions(driver);
actions.moveToElement(element).click().perform();
By Javascri...
AWS MySQL RDS vs AWS DynamoDB [closed]
I've been using MySQL for a fair while now and I'm comfortable with its structure & SQL Queries etc.
4 Answers
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Convert string with commas to array
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For simple array members like that, you can use JSON.parse.
var array = JSON.parse("[" + string + "]");
This gives you an Array of numbers.
[0, 1]
If you use .split(), you'll end up with an Array of strings.
["0", "1"...