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Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
...<- data.frame(a = 1:3, b = letters[1:3])
comparison <- compare(a1,a2,allowAll=TRUE)
comparison$tM
# a b
#1 1 a
#2 2 b
#3 3 c
The function compare gives you a lot of flexibility in terms of what kind of comparisons are allowed (e.g. changing order of elements of each vector, changing order a...
How to install latest (untagged) state of a repo using bower?
I have a very small repo in which I do all dev work in the master branch and use tags as "stable" points in history.
6 An...
Why is using “for…in” for array iteration a bad idea?
...undefined
undefined
undefined
5
*/
can sometimes be totally different from the other:
var a = [];
a[5] = 5;
for (var x in a) {
// Shows only the explicitly set index of "5", and ignores 0-4
console.log(x);
}
/* Will display:
5
*/
Also consider tha...
PHP 5: const vs static
...nd private are irrelevant in terms of consts" - Why? Are consts by default all public? all private?
– Chris Jacob
Nov 8 '09 at 22:24
1
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How to check a checkbox in capybara?
... I couldn't find a way to make this work with the CSS selector at all! There must be some way to escape the square bracket but I couldn't find it. I had to resort to an XPath finder: find(:xpath, ".//input[@id='Extrapainful[]'][@value='12345']").set(true)
– Jon M
...
What is the difference between YAML and JSON?
What are the differences between YAML and JSON, specifically considering the following things?
13 Answers
...
HttpSecurity, WebSecurity and AuthenticationManagerBuilder
...icationManagerBuilder) is used to establish an authentication mechanism by allowing AuthenticationProviders to be added easily: e.g. The following defines the in-memory authentication with the in-built 'user' and 'admin' logins.
public void configure(AuthenticationManagerBuilder auth) {
auth
...
How can I nullify css property?
Basically I have two external css in my page.
7 Answers
7
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how to solve “ruby installation is missing psych” error?
I used rvm to install ruby 1.9.3. even though it was successfully installed, it complained about libyaml. and now every time i wanna install a gem (say rails) this warning shows up:
...
Android Studio - debug keystore
... your gradle.build file which means your secrets might be disclosed (especially in repository commits). With this solution you get the control of using your own keystore and the magic of automation during debug and release builds.
1) Create a gradle.properties (if you don't already have one).
The...