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How can I extract a predetermined range of lines from a text file on Unix?
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sed -n '16224,16482p;16483q' filename > newfile
From the sed manual:
p -
Print out the pattern space (to the standard output). This command is usually only used in conjunction with the -n command-line option.
n -
If auto-print is not disabled, print t...
How to remove all .svn directories from my application directories
...n export tool I have in my application, is to clean all .svn directories from my application directory tree. I am looking for a recursive command in the Linux shell that will traverse the entire tree and delete the .svn files.
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About “*.d.ts” in TypeScript
...y or underscore, an existing javascript library. You want to consume those from your typescript code.
Rather than rewriting jquery or underscore or whatever in typescript, you can instead write the d.ts file, which contains only the type annotations. Then from your typescript code you get the types...
Why are elementwise additions much faster in separate loops than in a combined loop?
...ch large allocations are requested, the allocator will request fresh pages from the OS. Therefore, there is a high chance that large allocations will appear at the same offset from a page-boundary.
Here's the test code:
int main(){
const int n = 100000;
#ifdef ALLOCATE_SEPERATE
double *a1 =...
rsync exclude according to .gitignore & .hgignore & svn:ignore like --filter=:C
...he command, except @db uses :e which i think excludes the .gitignore files from being copied, which is not what I wanted.)
– Bampfer
Dec 27 '19 at 17:54
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Append a dictionary to a dictionary [duplicate]
...hat if extra and orig have overlapping keys, the final value will be taken from extra. For example,
>>> d1 = {1: 1, 2: 2}
>>> d2 = {2: 'ha!', 3: 3}
>>> d1.update(d2)
>>> d1
{1: 1, 2: 'ha!', 3: 3}
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Generating random numbers in Objective-C
...and(3) and
random(3).
The arc4random_stir() function reads data from /dev/urandom and uses it to permute the S-Boxes via
arc4random_addrandom().
There is no need to call arc4random_stir() before using arc4random(), since arc4random() automatically
initializes itself.
EXAM...
How to execute a file within the python interpreter?
I'm trying to execute a file with python commands from within the interpreter.
11 Answers
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Swift native base class or NSObject
...n include or omit a superclass as needed.
Note that omitting a superclass from the class declaration, doesn't assign a implicit base superclass of any kind. It defines a base class, which will effectively become the root for an independent class hierarchy.
From the language reference:
Swift cl...
Removing carriage return and new-line from the end of a string in c#
...move the carriage return character (\r) and the new line character (\n) from the end of a string?
12 Answers
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