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Reading an Excel file in PHP [closed]
...ted Sep 10 '10 at 18:53
user229044♦
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answered Feb 19 '09 at 3:07
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Extracting specific columns from a data frame
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4
Given the furious rate of change in the tidyverse, I would caution against using this pattern. This is in addition to my strong preference a...
How can I multiply and divide using only bit shifting and adding?
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14 Answers
14
Active
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How to print a dictionary line by line in Python?
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145
for x in cars:
print (x)
for y in cars[x]:
print (y,':',cars[x][y])
output:
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Detect URLs in text with JavaScript
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edited Jun 1 at 5:43
mplungjan
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answ...
What is the difference between substr and substring?
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answered Sep 19 '10 at 11:41
Delan AzabaniDelan Azabani
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Determining complexity for recursive functions (Big O notation)
...ften Big O notation and complexity analysis uses base 2.
void recursiveFun4(int n, int m, int o)
{
if (n <= 0)
{
printf("%d, %d\n",m, o);
}
else
{
recursiveFun4(n-1, m+1, o);
recursiveFun4(n-1, m, o+1);
}
}
Here, it's O(2^n), or exponential, since...
What is the string length of a GUID?
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Guid.NewGuid().ToString() => 36 characters (Hyphenated)
outputs: 12345678-1234-1234-1234-123456789abc
Guid.NewGuid().ToString("D") => 36 characters (Hyphenated, same as ToString())
outputs: 12345678-1234-1234-1234-123456789abc
Guid.NewGuid().ToString("N") => 32 characters (Digits only)
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How to get cumulative sum
...| 1 | 10 | 10 |
| 2 | 12 | 22 |
| 3 | 3 | 25 |
| 4 | 15 | 40 |
| 5 | 23 | 63 |
Edit: this is a generalized solution that will work across most db platforms. When there is a better solution available for your specific platform (e.g., gareth's), use it!
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Short description of the scoping rules?
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426
Actually, a concise rule for Python Scope resolution, from Learning Python, 3rd. Ed.. (These r...