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How to reorder data.table columns (without copying)
... c b a
# [1,] 0.2880365 3 1
# [2,] 0.7785115 2 2
# [3,] 0.3297416 1 3
From ?setcolorder:
In data.table parlance, all set* functions change their input by reference. That is, no copy is made at all, other than temporary working memory, which is as large as one column.
so should be pretty e...
What is the expected syntax for checking exception messages in MiniTest's assert_raises/must_raise?
...or
end
If you need to test something on the error object, you can get it from the assertion or expectation like so:
describe "testing the error object" do
it "as an assertion" do
err = assert_raises RuntimeError { bar.do_it }
assert_match /Foo/, err.message
end
it "as an exception"...
Java regular expression OR operator
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What if i need to delimit these strings from other pieces of the regex that are also strings? e.g. eee(ff|gg)eee Do I have to use parentheses?
– Eric Conner
Jan 9 '10 at 0:54
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AngularJS check if form is valid in controller
...her solution
Set a hidden scope variable in your html then you can use it from your controller:
<span style="display:none" >{{ formValid = myForm.$valid}}</span>
Here is the full working example:
angular.module('App', [])
.controller('myController', function($scope) {
$scope....
Should I use Python 32bit or Python 64bit
...ticular).
For example if your app requires > 2GB of RAM, so you switch from 32bit to 64bit you may find that your app is now requiring > 4GB of RAM.
Check whether all of your 3rd party modules are available in 64 bit, otherwise it may be easier to stick to 32bit in the meantime
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Does the ternary operator exist in R?
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thanks Joshua, your answer helped a lot, I found answer from post you mentioned stackoverflow.com/a/8792474/3019570
– Mahdi Jadaliha
Feb 3 '16 at 20:53
add ...
Why does the CheckBoxFor render an additional input tag, and how can I get the value using the FormC
...d, the ModelBinder will automatically take
care of extracting the 'true' from the 'true,false'
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Iterating over each line of ls -l output
...You might want to do read -r or else bash will strip unescaped backslashes from the data.
– Brian Gordon
Apr 18 '17 at 18:34
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Create table using Javascript
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This should work (from a few alterations to your code above).
function tableCreate() {
var body = document.getElementsByTagName('body')[0];
var tbl = document.createElement('table');
tbl.style.width = '100%';
tbl.setAttribute(...
How to configure slf4j-simple
... is created, init() method is run and it fetches the default logging level from system properties. This isn't refreshed at any point. Also, org.slf4j.impl.SimpleLoggerFactory creates a logger for a class only once, thus, the same logger is always returned for given class (or name). However, it is ...