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Excel “External table is not in the expected format.”
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23 Answers
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What is the difference between const int*, const int * const, and int const *?
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2273
Read it backwards (as driven by Clockwise/Spiral Rule):
int* - pointer to int
int const * - po...
Difference between == and ===
...ot identical and the output the two instance are not identical!
let person3 = person1
P.S: Classes are reference types and person1's reference is copied to person3 with this assignment operation, thus both references point the same instance in Heap area.
if person3 === person1 {
print("the tw...
Best practice to validate null and empty collection in Java
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325
If you use the Apache Commons Collections library in your project, you may use the CollectionU...
Best practices/performance: mixing StringBuilder.append with String.concat
...(s2)
Multiple strings with +
Worth to note that:
String s = s1 + s2 + s3 + ... +sN
is translated to:
String s = new StringBuilder(s1).append(s2).append(s3)...apend(sN).toString();
concat()
String s = s1.concat(s2);
String creates char[] array that can fit both s1 and s2. Copies s1 and s2...
How do I create an average from a Ruby array?
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Joshua Pinter
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answered Aug 27 '09 at 14:00
John Feminel...
How to overload std::swap()
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135
The right way to overload swap is to write it in the same namespace as what you're swapping, so...
What is the difference between UTF-8 and ISO-8859-1?
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332
UTF-8 is a multibyte encoding that can represent any Unicode character. ISO 8859-1 is a single...
How can I list all the deleted files in a Git repository?
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edited May 23 '17 at 12:18
Community♦
111 silver badge
answered May 16 '11 at 13:19
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Checking network connection
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133
Perhaps you could use something like this:
import urllib2
def internet_on():
try:
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