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Get city name using geolocation

...ake an educated guess as to which one will have the city. "administrative_area_level_1" is usually what you are looking for but sometimes locality is the city you are after. Anyhow - more details on google response types can be found here and here. Below is the code that should do the trick: &...
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Can “list_display” in a Django ModelAdmin display attributes of ForeignKey fields?

...ion, you can do look ups like: class UserAdmin(admin.ModelAdmin): list_display = (..., 'get_author') def get_author(self, obj): return obj.book.author get_author.short_description = 'Author' get_author.admin_order_field = 'book__author' ...
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How to generate a random string in Ruby

...).chr }.join I spend too much time golfing. (0...50).map { ('a'..'z').to_a[rand(26)] }.join And a last one that's even more confusing, but more flexible and wastes fewer cycles: o = [('a'..'z'), ('A'..'Z')].map(&:to_a).flatten string = (0...50).map { o[rand(o.length)] }.join ...
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What techniques can be used to speed up C++ compilation times?

...more than once in a single translation unit. #pragma once #ifndef filename_h #define filename_h // Header declarations / definitions #endif By using both the pragma and the ifndef, you get the portability of the plain macro solution, as well as the compilation speed optimization that some compi...
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How can I match a string with a regex in Bash?

...n the comment above, We need to store the regex on a var The variable BASH_REMATCH is set after you match the expression, and ${BASH_REMATCH[n]} will match the nth group wrapped in parentheses ie in the following ${BASH_REMATCH[1]} = "compressed" and ${BASH_REMATCH[2]} = ".gz" if [[ "compressed.gz...
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How to set environment variables in Python?

... @darth_coder It's true for all processes on Unix-like operating systems. I don't know about the other operating system. Note that shell variables are not stored in the environment unless you export them. – S...
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What does “dereferencing” a pointer mean?

...hat can be written to, then you can do things like this: int x = 2; int* p_x = &x; // Put the address of the x variable into the pointer p_x *p_x = 4; // Change the memory at the address in p_x to be 4 assert(x == 4); // Check x is now 4 Above, you must have known at compile time that ...
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Using numpy to build an array of all combinations of two arrays

... TypeError: slice indices must be integers or None or have an __index__ method thrown by cartesian(arrays[1:], out=out[0:m,1:]) – Boern Sep 25 '17 at 15:48 ...
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C++应用程序添加VBScript和JavaScript支持 - C/C++ - 清泛网移动版 - 专注C/C++及内核技术

...Data); VARIANT GetAsVariant(); protected: LPSAFEARRAY m_pSA; private: }; It provides the exact same features that you will want to use with SAFEARRAY object but its usage may be simpler for some of us (like me!). The function GetAsVariant may be useful in case when you...
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How to combine two or more querysets in a Django view?

... pagination on the search result list, I would like to use a generic object_list view to display the results. But to do that, I have to merge 3 querysets into one. ...