大约有 1,100 项符合查询结果（耗时：0.0301秒） [XML]
How to count TRUE values in a logical vector
...ely, you can add third argument that will return numeric vector with final score, or data.frame with embedded score.
fscore <- function(x, sol, output = 'numeric') {
if (ncol(x) != length(sol)) {
stop('Number of items differs from length of correct answers!')
} else {
inc...
Java String - See if a string contains only numbers and not letters
...trings (75% strings contain non-digit symbols)
Benchmark Mode Cnt Score Error Units
testIsDigit thrpt 5 9.275 ± 2.348 ops/s
testPattern thrpt 5 2.135 ± 0.697 ops/s
testParseLong thrpt 5 0.166 ± 0.021 ops/s
## Test load with 50% valid strings (50% strings contain...
Issue with adding common code as git submodule: “already exists in the index”
...to git and would appreciate help with adding submodules.
I've received two projects sharing some common code. The shared code was just copied into the two projects. I created a separate git repo for the common code and removed it from the projects with the plan to add it as a git submodule.
...
How to get distinct values for non-key column fields in Laravel?
...thod as shown in a few answers here. Though somehow groupBy still seems to score the highest. However this would be truly distinct if that is the only column I'm selecting.
– gthuo
Nov 7 '17 at 5:04
...
How do I count the number of occurrences of a char in a String?
...once
More info in github
Perfomance test (using JMH, mode = AverageTime, score 0.010 better then 0.351):
Benchmark Mode Cnt Score Error Units
1. countMatches avgt 5 0.010 ± 0.001 us/op
2. countOccurrencesOf avgt 5 0.010 ± 0.001 us/op
3. stringTokenizer ...
What happens to a github student account's repositories at the end of 2 years?
...email address. I'm planning to use the private repositories for some class projects this semester, but I'm wondering what will happen to those repositories at the end of 2 years when my free student upgrade expires. I'm assuming it's the same thing that happens when you downgrade from a micro to a f...
NUnit vs. Visual Studio 2008's test projects for unit testing [closed]
I am going to be starting up a new project at work and want to get into unit testing. We will be using Visual Studio 2008, C#, and the ASP.NET MVC stuff. I am looking at using either NUnit or the built-in test projects that Visual Studio 2008 has, but I am open to researching other suggestions. ...
ImportError: No module named pip
...
I had the same problem.
My solution:
For Python 3
sudo apt-get install python3-pip
For Python 2
sudo apt-get install python-pip
share
|
...
Converting a Uniform Distribution to a Normal Distribution
... next call for a sample, you return the cached value.
Box-Muller gives a Z-score
You have to then scale the Z-score by the standard deviation and add the mean to get the full value in the normal distribution.
share
...
Switching to landscape mode in Android Emulator
This is probably a pretty easy to answer question, but I can't find the solution myself after a couple hours of searching the documentation and Google. I set the orientation of my Android app to landscape in the AndroidManifest.xml file:
...