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Getting the first character of a string with $str[0]
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edited Aug 8 '17 at 4:14
Alexis Wilke
14.2k77 gold badges5151 silver badges9898 bronze badges
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Find XOR of all numbers in a given range
...u are given a large range [a,b] where 'a' and 'b' can be typically between 1 and 4,000,000,000 inclusive. You have to find out the XOR of all the numbers in the given range.
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Extract elements of list at odd positions
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Solution
Yes, you can:
l = L[1::2]
And this is all. The result will contain the elements placed on the following positions (0-based, so first element is at position 0, second at 1 etc.):
1, 3, 5
so the result (actual numbers) will be:
2, 4, 6
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How to match all occurrences of a regex
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edited May 18 '12 at 6:23
Andrew Marshall
87.3k1818 gold badges202202 silver badges204204 bronze badges
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Cast Object to Generic Type for returning
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212
You have to use a Class instance because of the generic type erasure during compilation.
publi...
How to slice an array in Bash
Looking the "Array" section in the bash(1) man page, I didn't find a way to slice an array.
4 Answers
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Why is January month 0 in Java Calendar?
In java.util.Calendar , January is defined as month 0, not month 1. Is there any specific reason to that ?
16 Answers
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How to access array elements in a Django template?
... access individual elements of the array in the array (e.g. arr[0] , arr[1] ) etc. instead of looping through the whole array.
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Check if a value is within a range of numbers
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221
You're asking a question about numeric comparisons, so regular expressions really have nothing t...
Converting a column within pandas dataframe from int to string
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142
In [16]: df = DataFrame(np.arange(10).reshape(5,2),columns=list('AB'))
In [17]: df
Out[17]:
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