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Should I declare Jackson's ObjectMapper as a static field?
...fine as well.
EDIT: (2013/10)
With 2.0 and above, above can be augmented by noting that there is an even better way: use ObjectWriter and ObjectReader objects, which can be constructed by ObjectMapper.
They are fully immutable, thread-safe, meaning that it is not even theoretically possible to cau...
LINQ To Entities does not recognize the method Last. Really?
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Instead of Last(), Try this:
model.OrderByDescending(o => o.Id).FirstOrDefault();
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Specify custom Date format for colClasses argument in read.table/read.csv
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A long time ago, in the meantime the problem has been solved by Hadley Wickham. So nowadays the solution is reduced to a oneliner:
library(readr)
data <- read_csv("data.csv",
col_types = cols(actual_finish = col_datetime(format = "%d/%m/%Y")))
Maybe we want eve...
How to pull request a wiki page on GitHub?
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FYI, I stand by this approach - it worked out pretty well. However, for completely different reasons I ended up migrating the whole lot into Jekyll so this isn't how riskfirst works anymore
– Rob Moffat
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Python Regex - How to Get Positions and Values of Matches
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The 'end index' returned by the span() is like the 'stop' in Python's slice notation in that it goes up to but doesn't include that index; see here.
– Wayne
Nov 20 '19 at 22:11
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Find the min/max element of an Array in JavaScript
...ay again that max belongs to Math...", but it seems I don't have to do so (by setting the first argument of apply as null).
– ziyuang
Dec 21 '15 at 13:45
10
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How can I ignore a property when serializing using the DataContractSerializer?
... work if the class has [Serializable] attribute. See details in the answer by Doug.
– Alex Fainshtein
Jun 21 at 19:23
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Perform an action in every sub-directory using Bash
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@JoshC, both variants will break the directory created by mkdir 'directory name with spaces' into four separate words.
– Charles Duffy
May 8 '18 at 16:42
5
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Read environment variables in Node.js
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When using Node.js, you can retrieve environment variables by key from the process.env object:
for example
var mode = process.env.NODE_ENV;
var apiKey = process.env.apiKey; // '42348901293989849243'
Here is the answer that will explain setting environment variables in node.js
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Disable a group of tests in rspec?
..., xcontext, xit to disable it.
Update:
Since rspec 2.11, it includes xit by default. so the new code will be
# put into spec_helper.rb
module RSpec
module Core
module DSL
def xdescribe(*args, &blk)
describe *args do
pending
end
end
alias xc...