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Fastest Way to Find Distance Between Two Lat/Long Points

...e much faster because you have drastically limited the number of points to test to the points within the box. I call this technique "Thinking inside the box" :) EDIT: Can this be put into one SQL statement? I have no idea what mySql or Php is capable of, sorry. I don't know where the best place i...
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HTTP vs HTTPS performance

... December 2014 Update You can easily test the difference between HTTP and HTTPS performance in your own browser using the HTTP vs HTTPS Test website by AnthumChris: “This page measures its load time over unsecure HTTP and encrypted HTTPS connections. Both page...
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How do browser cookie domains work?

...fc is a pretty accurate reflection of how major browsers behave. my recent tests on browsers confirmed that. although, they may differ on corner cases involving public suffixes. – ZhongYu Jul 9 '15 at 14:07 ...
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How to convert std::string to lower case?

...:locale, std::tolower int main () { std::locale loc; std::string str="Test String.\n"; for(auto elem : str) std::cout << std::tolower(elem,loc); } share | improve this answer ...
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How to check Django version

...d 2.7. Now I have installed Django. I could run the sample application for testing Django succesfuly. But how do I make sure whether Django uses the 2.6 or 2.7 version and what version of modules Django uses? ...
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Uninstall all installed gems, in OSX?

...a sane list of default gems which for me is: "gem install bundler json minitest rake rdoc" – Wil Moore III May 2 '12 at 8:33 5 ...
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VC DDE(Dynamic Data Exchange)与EXCEL连接 - C/C++ - 清泛网 - 专注C/C++及内核技术

...Inst, HCONV hConv, char* szItem, char* sDesc) { HSZ hszItem = DdeCreateStringHandle(idInst, szItem, 0); HDDEDATA hData = DdeClientTransaction(NULL,0,hConv,hszItem,CF_TEXT, XTYP_REQUEST,5000 , NULL); if (hData==NULL) { printf("Request fa...
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Run a JAR file from the command line and specify classpath

... specify a class path like this: java -cp <jar_name.jar:libs/*> com.test.App jar_name.jar is the full name of the JAR you want to execute libs/* is a path to your dependency JARs com.test.App is the fully qualified name of the class from the JAR that has the main(String[]) method The jar...
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Type List vs type ArrayList in Java [duplicate]

...eal with that; e.g. public <T extends List & RandomAccess> void test(T list) { // do stuff } If you call that with a list that does not implement RandomAccess you will get a compilation error. You could also test dynamically ... using instanceof ... if static typing is too awkward....
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Finding duplicates in O(n) time and O(1) space

...ch step. As we go through the array, success on the A[i] != i part of the test implies that A[i] could be a duplicate that hasn't been seen before. If we haven't seen it before, then we expect A[i]'s home location to point to itself -- that's what's tested for by the second half of the if conditio...