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Different ways of clearing lists
...lman because in first you are changing a reference for 'a' to point to new array, not clearing one, and b still points an old one
– Pax0r
Feb 4 '15 at 14:36
4
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Get second child using jQuery
...it is also relavant to know what exactly is in the $(t) variable. Is it an array of <TD> or is it a <TR> node with several <TD>s inside it?
To further illustrate the point, see the jsPerf scores on a <ul> list with 50 <li> children:
http://jsperf.com/second-child-selec...
How to sort a list/tuple of lists/tuples by the element at a given index?
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I just want to add to Stephen's answer if you want to sort the array from high to low, another way other than in the comments above is just to add this to the line:
reverse = True
and the result will be as follows:
data.sort(key=lambda tup: tup[1], reverse=True)
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How to get the selected radio button’s value?
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ECMAScript 6 version
let genderS = Array.from(document.getElementsByName("genderS")).find(r => r.checked).value;
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How can I display an image from a file in Jupyter Notebook?
...StringIO import StringIO
import IPython.display
import numpy as np
def showarray(a, fmt='png'):
a = np.uint8(a)
f = StringIO()
PIL.Image.fromarray(a).save(f, fmt)
IPython.display.display(IPython.display.Image(data=f.getvalue()))
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How to get month name from Calendar
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Well, you should add 1 to the month. Arrays start from 0.
– RoccoDev
Aug 14 '16 at 14:19
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How can I round down a number in Javascript?
...pidermonkey 1.7, and ran a loop to sum up the floor'ed value of x[i] on an array of 100000 floating point numbers, first with Math.floor(), then with bitwise or as you suggest. It took approx the same time, 125 msec.
– Jason S
Sep 18 '09 at 14:49
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Check if a string has white space
...n hasWhiteSpace(s) {
const whitespaceChars = [' ', '\t', '\n'];
return Array.from(s).some(char => whitespaceChars.includes(char));
}
const withSpace = "Hello World!";
const noSpace = "HelloWorld!";
console.log(hasWhiteSpace(withSpace));
console.log(hasWhiteSpace(noSpace));
console.log(hasW...
How to find out what character key is pressed?
... Mousetrap.record(function(sequence) {
// sequence is an array like ['ctrl+k', 'c']
alert('You pressed: ' + sequence.join(' '));
});
}
</script>
<button onclick="recordSequence()">Record</button>
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“document.getElementByClass is not a function”
...at is more browser compliant? Or is it possible to select a range for the array nodes? (ie. 0-100)?
– user547794
Sep 20 '11 at 5:27
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