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How to find out which JavaScript events fired?
I have a select list:
4 Answers
4
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Getting a better understanding of callback functions in JavaScript
... this enhance performance? This is like checking the type, checking if the converted boolean returns true and then checking its type again and testing it against the string... Could you explain why?
– headacheCoder
Oct 21 '13 at 12:41
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Java: Check if enum contains a given string?
...ontain many values, perhaps builda HashSet or similar of your enum values converted to a string and query that HashSet instead.
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R: += (plus equals) and ++ (plus plus) equivalent from c++/c#/java, etc.?
...ement operator was introduced to make job for compiler easier, as it could convert the code to those machine language instructions directly.
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How do you divide each element in a list by an int?
...to see what is the fastest way for a large number. So, I found that we can convert the int to an array and it can give the correct results and it is faster.
arrayint=np.array(myInt)
newList = myList / arrayint
This a comparison of all answers above
import numpy as np
import time
import random
m...
Remove duplicated rows using dplyr
...ce(from = 1, to = 1)
Or maybe a variation of unique() that would let you select which
variables to use:
df %>% unique(x, y)
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How to add “on delete cascade” constraints?
...hy until you see "Constraints"), or you can query the information schema.
select *
from information_schema.key_column_usage
where position_in_unique_constraint is not null
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How do you reindex an array in PHP?
...like Gumbo posted.
However, to answer your question, this function should convert any array into a 1-based version
function convertToOneBased( $arr )
{
return array_combine( range( 1, count( $arr ) ), array_values( $arr ) );
}
EDIT
Here's a more reusable/flexible function, should you desire...
Python division
...hat always pops in my head when I am doing arithmetic operations (should I convert to float and which number), an example from that aspect is presented:
>>> a = 1/2/3/4/5/4/3
>>> a
0
When we divide integers, not surprisingly it gets lower rounded.
>>> a = 1/2/3/4/5/4/f...
How to hash some string with sha256 in Java?
...
SHA-256 isn't an "encoding" - it's a one-way hash.
You'd basically convert the string into bytes (e.g. using text.getBytes(StandardCharsets.UTF_8)) and then hash the bytes. Note that the result of the hash would also be arbitrary binary data, and if you want to represent that in a string, yo...