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Testing the type of a DOM element in JavaScript
... tag, not the type of the DOM element.
In that case, use the elem.tagName or elem.nodeName property.
if you want to get really creative, you can use a dictionary of tagnames and anonymous closures instead if a switch or if/else.
...
check if variable is dataframe
...eritance (see What are the differences between type() and isinstance()?). For example, it will tell you if a variable is a string (either str or unicode), because they derive from basestring)
if isinstance(obj, basestring):
i_am_string(obj)
Specifically for pandas DataFrame objects:
import p...
How to check if a string starts with one of several prefixes?
...is:
if (newStr4.startsWith("Mon") || newStr4.startsWith("Tues") || ...)
Or you could use regular expression:
if (newStr4.matches("(Mon|Tues|Wed|Thurs|Fri).*"))
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...
Specify width in *characters*
...
1em is the height of an M, rather than the width. Same holds for ex, which is the height of an x. More generally speaking, these are the heights of uppercase and lowercase letters.
Width is a totally different issue....
Change your example above to
<div>
<span>1</...
Convert list to tuple in Python
...
It should work fine. Don't use tuple, list or other special names as a variable name. It's probably what's causing your problem.
>>> l = [4,5,6]
>>> tuple(l)
(4, 5, 6)
...
What is the __del__ method, How to call it?
...However, I cannot find a place where this method is used. The main reason for that is that I do not know how this method is used, probably not like that: obj1.del() . So, my questions is how to call the __del__ method?
...
How can I shuffle the lines of a text file on the Unix command line or in a shell script?
...ystems at least (doesn't appear to be in POSIX).
As jleedev pointed out: sort -R might also be an option. On some systems at least; well, you get the picture. It has been pointed out that sort -R doesn't really shuffle but instead sort items according to their hash value.
[Editor's note: sort -R a...
Why Doesn't C# Allow Static Methods to Implement an Interface?
...Methods specified on an interface should be there to specify the contract for interacting with an object. Static methods do not allow you to interact with an object - if you find yourself in the position where your implementation could be made static, you may need to ask yourself if that method rea...
Writing files in Node.js
...n console.log(err);
}
console.log("The file was saved!");
});
// Or
fs.writeFileSync('/tmp/test-sync', 'Hey there!');
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ACE vs Boost vs POCO [closed]
I have been working with the Boost C++ Libraries for quite some time. I absolutely love the Boost Asio C++ library for network programming. However I was introduced to two other libraries: POCO and Adaptive Communication Environment (ACE) framework . I would like to know the good and bad of ...