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How to export table as CSV with headings on Postgresql?
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For v9.5, the command is now COPY products_273 TO '/tmp/products_199.csv' WITH (FORMAT CSV, HEADER);
– Shubham Goyal
Apr 20 '16 at 10:02
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What is the most effective way for float and double comparison?
...the order of operations can produce different results, it is important to know how "equal" you want the numbers to be.
Comparing floating point numbers by Bruce Dawson is a good place to start when looking at floating point comparison.
The following definitions are from The art of computer progr...
Getting Java version at runtime
...= version.substring(0, dot); }
} return Integer.parseInt(version);
}
Now you can check the version much more comfortably:
if(getVersion() < 6) {
// ...
}
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improve this answer
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sys.argv[1] meaning in script
...like to note that previous answers made many assumptions about the user's knowledge. This answer attempts to answer the question at a more tutorial level.
For every invocation of Python, sys.argv is automatically a list of strings representing the arguments (as separated by spaces) on the command-l...
Object comparison in JavaScript [duplicate]
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if (arguments.length < 1) {
return true; //Die silently? Don't know how to handle such case, please help...
// throw "Need two or more arguments to compare";
}
for (i = 1, l = arguments.length; i < l; i++) {
leftChain = []; //Todo: this can be cached
rightChain = ...
JavaScript for detecting browser language preference [duplicate]
...function(headers) {
language = headers['Accept-Language'];
nowDoSomethingWithIt(language);
}
});
Hope someone finds this useful.
Edit: I have written a small jQuery plugin on github that wraps this functionality: https://github.com/dansingerman/jQuery-Browser-Language
Edit 2:...
What is “:-!!” in C code?
... \
} while (0)
In fact, as of Linux 3.9, we now have a macro called compiletime_assert which uses this feature and most of the macros in bug.h have been updated accordingly. Still, this macro can't be used as an initializer. However, using by statement expressions (a...
Regex Email validation
...s that are being issued, as you can have TLD's with more than 3 characters now.
– AaronLS
Jul 22 '13 at 19:04
This reg...
Why does one use dependency injection?
.... So step 1 in your code is that you do:
ICanLog logger = new Logger();
Now the type inference doesn't change type any more, you always have one single interface to develop against. The next step is that you do not want to have new Logger() over and over again. So you put the reliability to creat...
Are PDO prepared statements sufficient to prevent SQL injection?
....6 by default: big5, cp932, gb2312, gbk and sjis. We'll select gbk here.
Now, it's very important to note the use of SET NAMES here. This sets the character set ON THE SERVER. There is another way of doing it, but we'll get there soon enough.
The Payload
The payload we're going to use for this in...