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Count the number of occurrences of a character in a string in Javascript
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I have updated this answer. I like the idea of using a match better, but it is slower:
console.log(("str1,str2,str3,str4".match(/,/g) || []).length); //logs 3
console.log(("str1,str2,str3,str4".match(new RegExp("str", "g")) || []).length); //logs 4
jsfiddle
Use a regular expression literal if...
Has anyone actually implemented a Fibonacci-Heap efficiently?
...of you ever implemented a Fibonacci-Heap ? I did so a few years back, but it was several orders of magnitude slower than using array-based BinHeaps.
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What does SQL clause “GROUP BY 1” mean?
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It means to group by the first column regardless of what it's called. You can do the same with ORDER BY.
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IndentationError: unindent does not match any outer indentation level
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Other posters are probably correct...there might be spaces mixed in with your tabs. Try doing a search & replace to replace all tabs with a few spaces.
Try this:
import sys
def Factorial(n): # return factorial
result = 1
for i in range (1,n):
result = result * i
prin...
jquery - fastest way to remove all rows from a very large table
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edited Oct 2 '15 at 19:14
answered Apr 6 '09 at 20:39
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How do I run only specific tests in Rspec?
I think there's a way to run only tests with a given label. Anybody know?
9 Answers
9
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Convert dd-mm-yyyy string to date
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Split on "-"
Parse the string into the parts you need:
var from = $("#datepicker").val().split("-")
var f = new Date(from[2], from[1] - 1, from[0])
Use regex
var date = new Date("15-05-2018".replace( /(\d{2})-(\d{2})-(\d{4}...
How do I do top 1 in Oracle?
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edited Jun 12 '16 at 14:36
Peter Mortensen
26.5k2121 gold badges9292 silver badges122122 bronze badges
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Can I have onScrollListener for a ScrollView?
... instance of ViewTreeObserver, you can add an OnScrollChangedListener() to it using the method addOnScrollChangedListener().
You can see more information about this class here.
It lets you be aware of every scrolling event - but without the coordinates. You can get them by using getScrollY() or ge...
Simple way to calculate median with MySQL
...t's the simplest (and hopefully not too slow) way to calculate the median with MySQL? I've used AVG(x) for finding the mean, but I'm having a hard time finding a simple way of calculating the median. For now, I'm returning all the rows to PHP, doing a sort, and then picking the middle row, but sur...