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MySQL: Insert record if not exists in table
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I doesn't test in Oracle database. It is working fine at MySQL and tested.
– Mahbub Tito
Oct 16 '16 at 4:15
9
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What is difference between functional and imperative programming languages?
...all your pure method at will without worrying about side effects.
Easier testing and debugging. Because pure functions can more easily be tested in isolation, you can write test code that calls the pure function with typical values, valid edge cases, and invalid edge cases.
For OOP People or
Imp...
How can I check if an ip is in a network in Python?
...x x86. I haven't really given any thought to endianess issues, but I have tested it against the "ipaddr" module using over 200K IP addresses tested against 8 different network strings, and the results of ipaddr are the same as this code.
def addressInNetwork(ip, net):
import socket,struct
ip...
Prevent automatic browser scroll on refresh
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Tested on Chrome 36, Firefox 30 and IE 11. Works very well!
– Fizzix
Aug 7 '14 at 1:46
24
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How to dynamically change a web page's title?
...ect! Google will index the title that was changed by JavaScript. I haven't tested on other search bots.Don't always assume a bot doesn't execute JavaScript. I created a new answer below, and then realized that simply showing and hiding tabs without changing the URL makes this more complex.
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Length of string in bash
...deplacement and other that could not be as simple...
Have a look at diffU8test.sh or diffU8test.sh.txt for more limitations.
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Convert PDF to image with high resolution
... \
-verbose \
-density 150 \
-trim \
test.pdf \
-quality 100 \
-flatten \
-sharpen 0x1.0 \
24-18.jpg
It results in the left image. Compare this to the result of my original command (the image on the right):
(To really see and a...
Android App Not Install. An existing package by the same name with a conflicting signature is alread
...have an application in LIVE in playstore, now I kept installed that app in testing device and now For updating newer version of app I'm updating "versionno" and "versionname" in app build.gradle file. Now I have made an release build with signed key, now while im trying to install that build in it ...
Is there a performance difference between i++ and ++i in C++?
...double(CLOCKS_PER_SEC)) << '\n';
return 0;
}
O(n) increment
Test
// b.cc
#include <array>
class Something {
public:
Something& operator++();
Something operator++(int);
private:
std::array<int,PACKET_SIZE> data;
};
Something& Something::operator++()
{...
MySQL, Check if a column exists in a table with SQL
...questions/7384711/… for an example of how to wrap a procedure around the test for the column and the conditional DML statement.
– Christopher Schultz
Jul 23 '14 at 20:14
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