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Difference between Python's Generators and Iterators
...eral concept: any object whose class has a __next__ method (next in Python 2) and an __iter__ method that does return self.
Every generator is an iterator, but not vice versa. A generator is built by calling a function that has one or more yield expressions (yield statements, in Python 2.5 and earl...
How do I hide an element when printing a web page?
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edited Dec 4 '18 at 15:22
community wiki
7 r...
How to work with complex numbers in C?
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int main() {
double complex z1 = 1.0 + 3.0 * I;
double complex z2 = 1.0 - 4.0 * I;
printf("Working with complex numbers:\n\v");
printf("Starting values: Z1 = %.2f + %.2fi\tZ2 = %.2f %+.2fi\n", creal(z1), cimag(z1), creal(z2), cimag(z2));
double complex sum = z1 + z2;
pr...
Append a Lists Contents to another List C#
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GlobalStrings.AddRange(localStrings);
Note: You cannot declare the list object using the int...
Xcode “The private key for is not installed on this mac - distributing”
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21 Answers
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PostgreSQL - fetch the row which has the Max value for a column
...id, time_stamp))
Bill's query has a cost estimate of 93k, and completes in 2.9 seconds (given a compound index on (usr_id, trans_id))
Query #1 below has a cost estimate of 16k, and completes in 800ms (given a compound index on (usr_id, trans_id, time_stamp))
Query #2 below has a cost estimate of 14k...
Modify tick label text
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edited Dec 7 '14 at 22:27
joelostblom
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an...
What breaking changes are introduced in C++11?
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The FDIS has a section for incompatibilities, at appendix C.2 "C++ and ISO C++ 2003".
Summary, paraphrasing the FDIS here, to make it (better) suitable as a SO answer. I added some examples of my own to illustrate the differences.
There are a few library-related incompatibilities w...
Saving a Numpy array as an image
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answered May 24 '09 at 0:26
dF.dF.
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What is difference between instantiating an object using new vs. without
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The line:
Time t (12, 0, 0);
... allocates a variable of type Time in local scope, generally...