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How can I quickly sum all numbers in a file?
...s with a file containing 1,000,000 numbers (in the range 0 - 9,999). On my Mac Pro, it returns virtually instantaneously. That's too bad, because I was hoping using mmap would be really fast, but it's just the same time:
use 5.010;
use File::Map qw(map_file);
map_file my $map, $ARGV[0];
$sum += $...
MySQL: Enable LOAD DATA LOCAL INFILE
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thx. btw, the my.cnf path is /etc/mysql/my.cnf in my machine (AWS EC2).
– SparkAndShine
Jun 16 '15 at 15:34
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Can Eclipse refresh resources automatically?
... back into sync, the refresh hook only exists for Windows, so on Linux and Mac OS it has to poll the filesystem periodically.
From 3.7 there's a new preference Settings > General > Workspace > Refresh On Access (aka Lightweight Refresh). This preference causes Eclipse to automatically ref...
30岁之后，程序员该向什么方向发展？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...例，因为我是30岁才开始学编程的，首先写了个社区网络系统。大概就这样在家里折腾了一年，然后加入了Teambition，在Teambition写前端，到人多了，前端团队成熟之后又开始写后端，带领后端团队搭建后端系统。
我为什么要做后...
Get most recent file in a directory on Linux
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Here's a solution for Mac: find $DIR -type f -exec stat -lt "%Y-%m-%d" {} \+ | cut -d' ' -f6- | sort -n | tail -1
– user
Oct 12 '15 at 20:32
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Get current time in seconds since the Epoch on Linux, Bash
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Maybe it's the version of date or because I'm using zsh (macOS Catalina) but this doesn't work for me. Running $ date -d "Oct 21 1973" +%s outputs usage: date [-jnRu] [-d dst] [-r seconds] [-t west] [-v[+|-]val[ymwdHMS]] ... [-f fmt date | [[[mm]dd]HH]MM[[cc]yy][.ss]] ...
R command for setting working directory to source file location in Rstudio
...might not necessarily work on every platform (Windows seems to work, Linux/Mac for some).
Keep in mind that this solution is for 'sourcing' the files, not necessarily for running chunks in that file.
see also get filename and path of `source`d file
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How to execute a JavaScript function when I have its name as a string
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I think Mac's answer is underrated. I'm not an expert but it seems well thought out and robust.
– Martin Hansen Lennox
Mar 9 '17 at 21:23
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Suggestions for debugging print stylesheets?
... an option for that in Chrome's inspector.
Open the DevTools inspector (mac: Cmd + Shift + C , windows: Ctrl + Shift + C)
Click on the Toggle device mode icon , located on the upper left corner of the DevTools panel. (windows: Ctrl+Shift+M, mac: Cmd+Shift+M).
Click on the More overrides icon in...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...hread_count_个io线程(easy_io_thread_t)，初始化针对每个eio(一般系统就只有一个)的统计信息结构(easy_summary_t)
2. 设置一些tcp参数，比如tcp_defer_accept，tcp_nodelay，设置一些负载保护参数，比如EASY_CONN_DOING_REQ_CNT，表示每个连接同时正在处...