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Can I grep only the first n lines of a file?

... Is there a way to do this when using grep's -l option? I'd like to list all the files who's first 5 characters are RIFFD. – James M. Lay May 23 '17 at 19:20 add a comment ...
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How to find SQL Server running port?

... -n" (from an elevated command prompt) and you don't see "sqlservr.exe" at all then either your SQL Server service is not running or its TCP/IP network library is disabled. Run SQL Server Configuration Manager (Start | All Programs | Microsoft SQL Server 2008 | Configuration Tools). Navigate to SQ...
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How do I escape a single quote ( ' ) in JavaScript? [duplicate]

... "onmouseover" attribute is just change(, and there's another "attribute" called ex1')' with no value. The truth is, HTML does not use \ for an escape character. But it does recognise " and ' as escaped quote and apostrophe, respectively. Armed with this knowledge, use this: doc...
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Colors in JavaScript console

...est: background: #444; color: #bada55; padding: 2px; border-radius:2px its all about the border-radius – Nick Sotiros Apr 30 '14 at 7:08 ...
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Is there an R function for finding the index of an element in a vector?

... @John : that's all true, but that is not what the OP asked. The OP asked, starting from a long vector, to find the first match of elements given in another one. And for completeness, I added that if you are interested in all indices, you'll...
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Allow CORS REST request to a Express/Node.js application on Heroku

...de on a clean ExpressJS app and it works just fine. Try move your app.use(allowCrossDomain) to the top of configure function. share | improve this answer | follow ...
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Is There a Better Way of Checking Nil or Length == 0 of a String in Ruby?

..., {}, and [] are considered blank. I.e. {}.blank?, [].blank?, false.blank? all evaluate to true. – ShaharZ Sep 20 '16 at 22:22 add a comment  |  ...
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How to remove the URL from the printing page?

... This actually worked on my Firefox 50 @MirzhanIrkegulov – aexl Dec 3 '16 at 23:44 ...
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What does MVW stand for?

... considered the ViewModel that is being decorated by a function that we call a Controller. Being able to categorize a framework and put it into one of the MV* buckets has some advantages. It can help developers get more comfortable with its apis by making it easier to create a mental mode...
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What command means “do nothing” in a conditional in Bash?

... you say do nothing when X, then rephrase it as avoid a branch where X. Usually you can make the avoidance happen by simply negating X and applying it to all other conditions. So the OPs example with the rule applied may be restructured as: if [ "$a" -lt 10 ] && [ "$a" -le 5 ] then ech...