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count vs length vs size in a collection
From using a number of programming languages and libraries I have noticed various terms used for the total number of elements in a collection.
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Efficient way to insert a number into a sorted array of numbers?
I have a sorted JavaScript array, and want to insert one more item into the array such the resulting array remains sorted. I could certainly implement a simple quicksort-style insertion function:
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Insert Update trigger how to determine if insert or update
...ble A's column (say Col1). How would I go around writing it so that I can handle both Update and Insert cases. How would I determine if the trigger is executed for an update or insert.
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How do I wait for an asynchronously dispatched block to finish?
I am testing some code that does asynchronous processing using Grand Central Dispatch. The testing code looks like this:
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How to assign from a function which returns more than one value?
...ge. It does not require a special operator but does require that the left hand side be written using list[...] like this:
library(gsubfn) # need 0.7-0 or later
list[a, b] <- functionReturningTwoValues()
If you only need the first or second component these all work too:
list[a] <- function...
Python matplotlib multiple bars
...lotlib, when I tried to call the bar function multiple times, they overlap and as seen the below figure the highest value red can be seen only.
How can I plot the multiple bars with dates on the x-axes?
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Angular ng-repeat Error “Duplicates in a repeater are not allowed.”
...'s part. It would be very, very easy to miss this issue during development and testing because your array never contained duplicates, only to have your app explode in production when it gets exposed to dupes for the first time. I've built Angular apps before without knowing about the "no dupes" rest...
Impossible to make a cached thread pool with a size limit?
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The ThreadPoolExecutor has the following several key behaviors, and your problems can be explained by these behaviors.
When tasks are submitted,
If the thread pool has not reached the core size, it creates new threads.
If the core size has been reached and there is no idle threads, it ...
Java: What is the difference between and ?
I am unable to understand the following text... Does it mean that <clinit> is for empty constructors? Why is important to have two different versions?
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ROW_NUMBER() in MySQL
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SELECT t0.col3
FROM table AS t0
LEFT JOIN table AS t1 ON t0.col1=t1.col1 AND t0.col2=t1.col2 AND t1.col3>t0.col3
WHERE t1.col1 IS NULL;
“Get the rows in the table for which no other row with matching col1,col2 has a higher col3.” (You will notice this and most other groupwise-maximum solu...