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What is “callback hell” and how and why does RX solve it?
...e from event handling code. You can easily handle details like async event ordering that are a nightmare when using state variables. I found RX was the cleanest implementation to perform a new network request after 3 network responses returned or to error handle the whole chain if one does not retur...
How do I add more members to my ENUM-type column in MySQL?
...o the end is fine, since you just add meaning old values. but changing the order / removing enums will make those numbers undefined. (eg. 1=>italy, 2=>germany), then extending will be (1=>italy, 2=>germany, 3=>sweenden).
– lintabá
Mar 21 '19 at ...
Is it better practice to use String.format over string Concatenation in Java?
...thout requiring a recompile of the executable to account for the different ordering. With argument positions you can also re-use the same argument without passing it into the function twice:
String.format("Hello %1$s, your name is %1$s and the time is %2$t", name, time)
...
Python: Check if one dictionary is a subset of another larger dictionary
...;= d2.items() are actually comparing 2 lists of tuples, without particular order, so the final result will probably not reliable. For this reason, I switch to @blubberdiblub 's answer.
– RayLuo
Feb 17 '17 at 20:43
...
Are Duplicate HTTP Response Headers acceptable?
...each subsequent field-value to the first, each
separated by a comma. The order in which header fields with the same
field-name are received is therefore significant to the interpretation
of the combined field value, and thus a proxy MUST NOT change the
order of these field values when a mess...
Replacement for “rename” in dplyr
...onious solution but this works and preserves all columns (though not their order). disp does not get duplicated.
– farnsy
Aug 22 '14 at 3:38
...
Why Collections.sort uses merge sort instead of quicksort?
...lly speaking, multiple sequential
stable sorts result in a lexicographic ordering on the keys in the
reverse order of the sorts: the final sort determines the most
significant subkey.)
It's a nice side benefit that Merge Sort guarantees n log n (time)
performance no matter what the inpu...
Where can I find the “clamp” function in .NET?
...er that with double and float, the CompareTo method corresponds to a total order where NaN is less than all other values, including NegativeInfinity. So it is not equivalent to the < operator. If you used < with a floating-point type, you would have to consider how to treat NaN also. This is n...
Tricky Google interview question
...st preserve duplicates coming from both its input sequences. See Data.List.Ordered package for related stuff.
– Will Ness
Apr 16 '12 at 15:37
1
...
SparseArray vs HashMap
...;
sparseArray.put(17, "pig");
Note that the int keys do not need to be in order. This can also be used to change the value at a particular int key.
Remove items
Use remove (or delete) to remove elements from the array.
sparseArray.remove(17); // "pig" removed
The int parameter is the integer key.
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