concatenation

The use case is, in my case, CSS file concatenation, before it gets minimized. To concat two CSS files: cat 1.css 2.css > out.css To add some text at one single position, I can do cat 1.css <<SOMESTUFF 2.css > out.css This will end in the middle. SOMESTUFF To add STDOUT from one other program: sed 's/foo/bar/g' 3.css | cat 1.css - 2.css > out.css So far so good. But I regularly come in situations, where I need to mix several strings, files and even program output together, like copyright headers, files preprocessed by sed(1) and so on. I'd like to concatenate them together in as little steps

This question already has an answer here: Most efficient way to concatenate strings in JavaScript? 4 answers I understand that doing something like var a = "hello"; a += " world"; It is relatively very slow, as the browser does that in O(n) . Is there a faster way of doing so without installing new libraries? Azodious This is the fastest way known to join strings together in javascript. For more details, see: Why is string concatenation faster than array join? JavaScript: How to join / combine two arrays to concatenate into one array? Mustafa The question is already answered, however when I

Say I have a list like this: [a, b, c, d, e, f, g] How do modify that list so that it looks like this? [a, b, c, def, g] I would much prefer that it modified the existing list directly, not created a new list. On what basis should the merging take place? Your question is rather vague. Also, I assume a, b, ..., f are supposed to be strings, that is, 'a', 'b', ..., 'f'. >>> x = ['a', 'b', 'c', 'd', 'e', 'f', 'g'] >>> x[3:6] = [''.join(x[3:6])] >>> x ['a', 'b', 'c', 'def', 'g'] Check out the documentation on sequence types , specifically on mutable sequence types . And perhaps also on string

I currently concatenate strings in c using the strcat() function from string.h library. I thought about it, and I got to a conclusion that it should be very expensive function, as before it starts to concatenate, it has to iterate over the char array until it finds the '\0' char. For example, if I concatenate the string "horses" 1000 times using strcat() , I'll have to pay (1 + 2 + 3 + ... + 1000) * strlen("horses") = (1000*1001)/2 * 6 = 3003000 I thought about the non-standard way, of maintaining an integer with the string length, and then sending to strcat() the pointer to the end of the

I have an array of arrays in Ruby on Rails (3.1) where all the internal arrays are of different size. Is there a way to easily concatenate all the internal arrays to get one big one dimesional array with all the items? I know you can use the Array::concat function to concatenate two arrays, and I could do a loop to concatenate them sequentially like so: concatenated = Array.new array_of_arrays.each do |array| concatenated.concat(array) end but I wanted to know if there was like a Ruby one-liner which would do it in a cleaner manner. Thanks for your help. You're looking for #flatten :

I'm struggling with the following: My gulpfile.js compiles all .less, minifies it and concattenates all CSS into ./dist/all.min.css Is there a way I can rewrite the HTML file, remove all style tags and only put one style tag into it loading the minified CSS? OverZealous The best way to handle this is to use one of the HTML injectors from the get-go. I'm using gulp-inject to some success so far. Add gulp-inject to your project: npm i --save-dev gulp-inject Assuming that you have a folder layout similar to this: build/ src/ index.html less/ main.less js/ app.js Your HTML should include this