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How do I get the fragment identifier (value after hash #) from a URL?
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No need for jQuery
var type = window.location.hash.substr(1);
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How to remove from a map while iterating it?
... (must_delete)
{
m.erase(it++); // or "it = m.erase(it)" since C++11
}
else
{
++it;
}
}
Note that we really want an ordinary for loop here, since we are modifying the container itself. The range-based loop should be strictly reserved for situations where we only care about the...
Remove unwanted parts from strings in a column
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data['result'] = data['result'].map(lambda x: x.lstrip('+-').rstrip('aAbBcC'))
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Print a file, skipping the first X lines, in Bash [duplicate]
I have a very long file which I want to print, skipping the first 1,000,000 lines, for example.
13 Answers
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HashMap get/put complexity
We are used to saying that HashMap get/put operations are O(1). However it depends on the hash implementation. The default object hash is actually the internal address in the JVM heap. Are we sure it is good enough to claim that the get/put are O(1) ?
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Why are elementwise additions much faster in separate loops than in a combined loop?
Suppose a1 , b1 , c1 , and d1 point to heap memory and my numerical code has the following core loop.
10 Answers
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What is the JavaScript >>> operator and how do you use it?
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213
It doesn't just convert non-Numbers to Number, it converts them to Numbers that can be expresse...
Check if a string contains an element from a list (of strings)
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how to get the last character of a string?
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12 Answers
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Best way to simulate “group by” from bash?
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14 Answers
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