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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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Replace only some groups with Regex
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315
A good idea could be to encapsulate everything inside groups, no matter if need to identify the...
How can I check whether a option already exist in select by JQuery
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This evaluates to true if it already exists:
$("#yourSelect option[value='yourValue']").length ...
嵌套块验证失败：未知的代码块类型: procedures_ifreturn，已拒绝添加 - AI...
...p; <comment pinned=\"false\" h=\"80\" w=\"160\">计算一个非负整数的阶乘。\n输入：n (数字)\n返回：n! (数字)</comment>\n <statement name=\"STACK\">\n <block type=\"controls_if\">...
Detect iPad users using jQuery?
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iPad Detection
You should be able to detect an iPad user by taking a look at the userAgent pro...
What's the difference between lists and tuples?
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Apart from tuples being immutable there is also a semantic distinction that should guide thei...
Change URL parameters
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I've extended Sujoy's code to make up a function.
/**
* http://stackoverflow.com/a/10997390/...
How do I exchange keys with values in a dictionary?
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How to convert an IPv4 address into a integer in C#?
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Building executable jar with maven?
...t the answer given in the question you mentioned is just wrong (UPDATE - 20101106: someone fixed it, this answer refers to the version preceding the edit) and this explains, at least partially, why you run into troubles.
It generates two jar files in logmanager/target: logmanager-0.1.0.jar, and lo...