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Remove duplicated rows
...for larger data sets
library(microbenchmark)
library(data.table)
set.seed(123)
DF <- as.data.frame(matrix(sample(1e8, 1e5, replace = TRUE), ncol = 10))
DT <- copy(DF)
setDT(DT)
microbenchmark(unique(DF), unique(DT))
# Unit: microseconds
# expr min lq mean median ...
href overrides ng-click in Angular.js
...ut removing href make it impossible for search engines to follow along the site.
– Darrrrrren
Nov 7 '14 at 13:34
2
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AngularJS 1.2 $injector:modulerr
...if your HTML looks like this:
</head>
<body ng-app="myWebSite">
<!-- My Web Site -->
<p>About my web site...</p>
etc ...
And your JavaScript looks like this (i.e has a typo on app name - myWebCite instead of myWebSite):
/** Main Ang...
How can I quickly delete a line in VIM starting at the cursor position?
... more about the black hole register and registers in general for extra VIM fun!
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Rotation methods deprecated, equivalent of 'didRotateFromInterfaceOrientation'?
... share me the method you have used. Thank you
– ask123
Jun 23 '14 at 7:44
2
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How to Batch Rename Files in a macOS Terminal?
...
You can use a regex as well. rename 's/123/onetwothree/g' *
– Bryan
Aug 10 '16 at 17:52
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How do I negate a condition in PowerShell?
...n't exist!"
}
You can also use !: if (!(Test-Path C:\Code)){}
Just for fun, you could also use bitwise exclusive or, though it's not the most readable/understandable method.
if ((test-path C:\code) -bxor 1) {write "it doesn't exist!"}
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Variable length (Dynamic) Arrays in Java
...
123
Yes: use ArrayList.
In Java, "normal" arrays are fixed-size. You have to give them a size an...
Why does Java's hashCode() in String use 31 as a multiplier?
...rved as a bad example for many programmers when writing their own hashCode functions.
– Hans-Peter Störr
May 12 '10 at 7:42
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Installing multiple instances of the same windows service on a server
... application and everything is going great. The client has come up with a fun configuration request that requires two instances of this service running on the same server and configured to point at separate databases.
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