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Check if an element is present in an array [duplicate]
... // false
[1, 2, 3].includes(1, 2); // false (second parameter is the index position in this array at which to begin searching)
As of JULY 2018, this has been implemented in almost all major browsers, if you need to support IE a polyfill is available.
Edit: Note that this returns false if th...
How to drop rows of Pandas DataFrame whose value in a certain column is NaN
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Is there any advantage to indexing and copying over dropping?
– Robert Muil
Jul 31 '15 at 8:15
9
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How to use a custom comparison function in Python 3?
...):
numbers = []
for letter in word:
numbers.append(my_alphabet.index(letter))
return numbers
x=['cbaba', 'ababa', 'bbaa']
x.sort(key=custom_key)
Since your language includes multi-character letters, your custom_key function will obviously need to be more complicated. That should g...
vagrant up failed, /dev/vboxnetctl: no such file or directory
...from Apple:
https://developer.apple.com/library/content/technotes/tn2459/_index.html
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jquery get all form elements: input, textarea & select
...m with the form id,
$('#formId input, #formId select').each(
function(index){
var input = $(this);
alert('Type: ' + input.attr('type') + 'Name: ' + input.attr('name') + 'Value: ' + input.val());
}
);
The below code helps to get the details of elements from all the forms ...
How to detect if a script is being sourced
...per. (FUNCNAME is a special bash array variable, it should have contiguous indexes corresponding to the call stack, as long as it is never unset.)
function issourced() {
[[ ${FUNCNAME[@]: -1} == "source" ]]
}
(In bash-4.2 and later you can use the simpler form ${FUNCNAME[-1]} instead for the ...
Practical non-image based CAPTCHA approaches?
...quite a good idea and is exactly the same as doing it in JavaScript. Good Call.
@AviD: I'm aware that this method is prone to direct attacks as I've mentioned on my blog. However, it will defend against your average spam bot which blindly submits rubbish to any form it can find.
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How to get the nth element of a python list or a default if not available
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l[index] if index < len(l) else default
To support negative indices we can use:
l[index] if -len(l) <= index < len(l) else default
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How to remove element from an array in JavaScript?
... splice() function. It allows you to remove any item in an Array based on Index Value:
var indexToRemove = 0;
var numberToRemove = 1;
arr.splice(indexToRemove, numberToRemove);
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How to check if a string contains a substring in Bash
... @bukzor Quotes stopped working here as of Bash 3.2+: tiswww.case.edu/php/chet/bash/FAQ E14). It's probably best to assign to a variable (using quotes), then compare. Like this: re="My s"; if [[ $string =~ $re ]]
– seanf
May 12 '15 at 0:55
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