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How to create a cron job using Bash automatically without the interactive editor?
... filtered output from crontab -l and the simple echo "$job", combined, are piped ('|') over to crontab - to finally be written.
And they all lived happily ever after!
In a nutshell:
This line of code filters out any cron jobs that match the command, then writes out the remaining cron jobs with th...
How to read from stdin line by line in Node
...or generic streams, like split. It makes things super-easy:
process.stdin.pipe(require('split')()).on('data', processLine)
function processLine (line) {
console.log(line + '!')
}
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improv...
pythonw.exe or python.exe?
...
PS: It does work when I pipe stdout and stderr somewhere: > pythonw ls.pyw >nul 2>&1 (even though nothing is written).
– handle
Jun 16 '16 at 8:06
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内存管理内幕：动态分配的选择、折衷和实现 - C/C++ - 清泛网 - 专注C/C++及内核技术
...用（实际上，一些 malloc 实现只能将内存归还给程序，而无法将内存归还给操作系统）。
物理内存和虚拟内存
要理解内存在程序中是如何分配的，首先需要理解如何将内存从操作系统分配给程序。计算机上的每一个进程都认...
How to delete and replace last line in the terminal using bash?
...at's very inefficient for large inputs. You can either take advantage of pipes: "seq 1 100000 | while read i; do ..." or use the bash c-style for loop: "for ((i=0;;i++)); do ..."
– tokland
Mar 5 '10 at 22:39
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How to split a file into equal parts, without breaking individual lines? [duplicate]
....txt wc outputs <number_of_lines> <filename> so you'd have to pipe the output to awk to grab the word count, but it's still significantly faster than cating the whole file and piping it to wc
– Carlos P
Dec 7 '13 at 19:46
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How to comment in Vim's config files: “.vimrc”?
...er: at-the-end-of-line comments) you can use command foo |" my comment (pipe for command separaion needed)
– Hartmut P.
Sep 23 '19 at 20:03
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Pinging servers in Python
...cess.Popen(["/bin/ping", "-c1", "-w100", "192.168.0.1"], stdout=subprocess.PIPE).stdout.read()
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Is there a way to make AngularJS load partials in the beginning and not at when needed?
...gulp.task('createTemplateCache', function () {
return gulp.src(paths)
.pipe(templateCache('templates.js', { module: 'myModule', root:'app/views'}))
.pipe(gulp.dest('app/scripts'));
});
templates.js (this file is autogenerated by the build task)
$templateCache.put('app/views/main.html'...
Compress files while reading data from STDIN
...zip > test.csv.gz
cat test.csv will send the data as stdout and using pipe-sign gzip will read that data as stdin. Make sure to redirect the gzip output to some file as compressed data will not be written to the terminal.
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