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Reuse Cucumber steps

... step "I login with valid credentials" end Old, deprecated method (for reference): You can call steps from other steps like this: Given /^I login successfully$/ Given "I login with valid credentials" Then "I should be logged in" end If all of the scenarios within a feature require thi...
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The written versions of the logical operators

This is the only place I've ever seen and , or and not listed as actual operators in C++. When I wrote up a test program in NetBeans, I got the red underlining as if there was a syntax error and figured the website was wrong, but it is NetBeans which is wrong because it compiled and ran as exp...
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Git SSH error: “Connect to host: Bad file number”

... After having this problem myself, I found a solution that works for me: Error message: ssh -v git@github.com OpenSSH_5.8p1, OpenSSL 1.0.0d 8 Feb 2011 debug1: Connecting to github.com [207.97.227.239] port 22. debug1: connect to address 207.97.227.239 port 22: Conne...
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What's a concise way to check that environment variables are set in a Unix shell script?

...cripts where I need to check that certain environment variables are set before I start doing stuff, so I do this sort of thing: ...
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JavaScript plus sign in front of function expression

I’ve been looking for information about immediately invoked functions, and somewhere I stumbled on this notation: 3 Answe...
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How do you match only valid roman numerals with a regular expression?

... You can use the following regex for this: ^M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})$ Breaking it down, M{0,4} specifies the thousands section and basically restrains it to between 0 and 4000. It's a relatively simple: 0: <empty> m...
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Are table names in MySQL case sensitive?

...ws, and case sensitive in most varieties of Unix. In MySQL, databases correspond to directories within the data directory. Each table within a database corresponds to at least one file within the database directory. Consequently, the case sensitivity of the underlying operating system play...
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Determining if a number is either a multiple of ten or within a particular set of ranges

... For the first one, to check if a number is a multiple of use: if (num % 10 == 0) // It's divisible by 10 For the second one: if(((num - 1) / 10) % 2 == 1 && num <= 100) But that's rather dense, and you might b...
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How do I find the duplicates in a list and create another list with them?

...et(a). To print duplicates, something like: a = [1,2,3,2,1,5,6,5,5,5] import collections print([item for item, count in collections.Counter(a).items() if count > 1]) ## [1, 2, 5] Note that Counter is not particularly efficient (timings) and probably overkill here. set will perform better. Th...
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How to make a DIV visible and invisible with JavaScript

... if [DIV] is an element then [DIV].style.visibility='visible' OR [DIV].style.visibility='hidden' share | improve this answer | follow | ...