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Convert a Scala list to a tuple?
... solution, the complaints about type-safety mean that you might get a MatchError at runtime. If you want, you can try-catch that error and do something if the List has the wrong length. Another nice feature of this solution is that the output doesn't have to be a tuple, it can be one of your own c...
Broken references in Virtualenvs
...ir folders inside .virtualenvs are still there and they give the following error whenever I try to run anything in them:
25...
What is the syntax rule for having trailing commas in tuple definitions?
..., and for Javascript always use jslint or equivalent to catch that sort of error before it gets near a browser.
– Duncan
Nov 3 '11 at 12:15
add a comment
|...
sed one-liner to convert all uppercase to lowercase?
...ance
– Sam Houston
Feb 26 '18 at 11:05
You can rename a bunch of files with that command : ls | awk '{print "mv " $0 ...
Setting variable to NULL after free
...ou get an immediate crash on most systems, telling you right away what the error is.
For local variables, it may be a little bit pointless if it is "obvious" that the pointer isn't accessed anymore after being freed, so this style is more appropriate for member data and global variables. Even for l...
Printing 1 to 1000 without loop or conditionals
...t: Added '&' so it will consider the address hence evading the pointer errors.
This version of the above in standard C, since it doesn't rely on arithmetic on function pointers:
#include <stdio.h>
#include <stdlib.h>
void f(int j)
{
static void (*const ft[2])(int) = { f, exit ...
MongoDB与内存 - 大数据 & AI - 清泛网 - 专注IT技能提升
...下文的，最好放在MongoDB的启动脚本里。
有时候，MongoDB连接数过多的话，会拖累性能，可以通过serverStatus查询连接数：
mongo> db.serverStatus().connections
每个连接都是一个线程，需要一个Stack，Linux下缺省的Stack设置一般比较大：
...
MongoDB与内存 - 大数据 & AI - 清泛网 - 专注IT技能提升
...下文的，最好放在MongoDB的启动脚本里。
有时候，MongoDB连接数过多的话，会拖累性能，可以通过serverStatus查询连接数：
mongo> db.serverStatus().connections
每个连接都是一个线程，需要一个Stack，Linux下缺省的Stack设置一般比较大：
...
MongoDB与内存 - 大数据 & AI - 清泛网 - 专注IT技能提升
...下文的，最好放在MongoDB的启动脚本里。
有时候，MongoDB连接数过多的话，会拖累性能，可以通过serverStatus查询连接数：
mongo> db.serverStatus().connections
每个连接都是一个线程，需要一个Stack，Linux下缺省的Stack设置一般比较大：
...
MongoDB与内存 - 大数据 & AI - 清泛网 - 专注IT技能提升
...下文的，最好放在MongoDB的启动脚本里。
有时候，MongoDB连接数过多的话，会拖累性能，可以通过serverStatus查询连接数：
mongo> db.serverStatus().connections
每个连接都是一个线程，需要一个Stack，Linux下缺省的Stack设置一般比较大：
...