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Is a Java hashmap search really O(1)?
I've seen some interesting claims on SO re Java hashmaps and their O(1) lookup time. Can someone explain why this is so? Unless these hashmaps are vastly different from any of the hashing algorithms I was bought up on, there must always exist a dataset that contains collisions.
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insert vs emplace vs operator[] in c++ map
...d::map<int,int> already has an element with key 5 and value 0
m[5] = 10; // postcondition: m[5] == 10
m.insert(std::make_pair(5,15)); // m[5] is still 10
In the case of insert the argument is an object of value_type, which can be created in different ways. You can direct...
Adding options to select with javascript
I want this javascript to create options from 12 to 100 in a select with id="mainSelect", because I do not want to create all of the option tags manually. Can you give me some pointers? Thanks
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How to create a printable Twitter-Bootstrap page
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157
Be sure to have a stylesheet assigned for printing.
It could be a separate stylesheet:
<li...
Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
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12 Answers
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How can I generate an INSERT script for an existing SQL Server table that includes all stored rows?
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411
Yes, but you'll need to run it at the database level.
Right-click the database in SSMS, select...
How is the default submit button on an HTML form determined?
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14 Answers
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How to explicitly discard an out argument?
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100
Starting with C# 7.0, it is possible to avoid predeclaring out parameters as well as ignoring ...
Is there any difference between GROUP BY and DISTINCT
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edited Feb 14 '19 at 23:55
brett rogers
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Get string between two strings in a string
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165
Perhaps, a good way is just to cut out a substring:
String St = "super exemple of string key ...