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How to 'insert if not exists' in MySQL?
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Just to inform everyone. Using INSERT … ON DUPLICATE KEY UPDATE method does increment any AUTO_INCREMENT column with failed insert. Probably because it's not really failed, but UPDATE'd.
– not2qubit
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Why does only the first line of this Windows batch file execute but all three lines execute in a com
...microsoft.com/resources/documentation/windows/xp/all/proddocs/… for more info on call
– Owen
Oct 27 '10 at 19:32
22
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Understanding the Gemfile.lock file
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However, since Gemfile.lock is a snapshot of Gemfile, which means all its information should come from Gemfile (or from default value if not specified in Gemfile).
For GEM, it lists all the dependencies you introduce directly or indirectly in the Gemfile. remote under GEM tells where to get the ge...
How can I get the full object in Node.js's console.log(), rather than '[Object]'?
...pect() directly.
Details below.
console.log() (and its alias, console.info()):
If the 1st argument is NOT a format string: util.inspect() is automatically applied to every argument:
o = { one: 1, two: 'deux', foo: function(){} }; console.log(o, [1,2,3]) // -> '{ one: 1, two: 'deux', foo...
Relation between CommonJS, AMD and RequireJS?
...turn the module immediately. This does not work well in the browser". More info here.
– msenni
Jan 6 '15 at 11:50
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ASP.NET WebApi unit testing with Request.CreateResponse
...an ArgumentNullException or InvalidOperationException.
See here for more info.
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C# Convert List to Dictionary
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Use this:
var dict = list.ToDictionary(x => x);
See MSDN for more info.
As Pranay points out in the comments, this will fail if an item exists in the list multiple times.
Depending on your specific requirements, you can either use var dict = list.Distinct().ToDictionary(x => x); to get ...
What is the fastest way to send 100,000 HTTP requests in Python?
..._ == "__main__":
import pathlib
import sys
assert sys.version_info >= (3, 7), "Script requires Python 3.7+."
here = pathlib.Path(__file__).parent
with open(here.joinpath("urls.txt")) as infile:
urls = set(map(str.strip, infile))
asyncio.run(make_requests(urls=ur...
Gradient of n colors ranging from color 1 and color 2
...e(gray.colors(10, 0.9, 0.4))
plot(rep(1,10),col=1:10,pch=19,cex=3))
More info on gray scale here.
Added
When I used the code above for different colours like blue and black, the gradients were not that clear.
heat.colors() seems more useful.
This document has more detailed information and o...
How to format all Java files in an Eclipse project at one time?
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@Luke and Jason McVetta: Thanks for the info, I've edited the answer to mention that selecting project root works in newer Eclipses and made the second paragraph a bit clearer.
– esaj
Jul 3 '13 at 6:53
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