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Batch script: how to check for admin rights
...erver) service is stopped, the error code for "Server service has not been started" is the same error code that you get for "Access is denied" resulting in a false negative. In other words, there are cases where you can run this check with administrative privileges and it will return the same erro...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...= easy_connection_add_listen(eio_, NULL, port_, &handler_);
rc = easy_eio_start(eio_);
easy_eio_wait(eio_);
easy_eio_create(eio_, io_thread_count_)做了如下几件事：
1. 分配一个easy_pool_t, 用来存放easy_io_t对象，io_thread_count_个io线程(easy_io_thread_t)，初始化针对每...
Bash script processing limited number of commands in parallel
...;
wait
For the above example, 4 processes process1 ... process4 would be started in the background, and the shell would wait until those are completed before starting the next set.
From the GNU manual:
wait [jobspec or pid ...]
Wait until the child process specified by each process ID pid...
How to use SharedPreferences in Android to store, fetch and edit values [closed]
...n success or failure. It saves values to SharedPreferences immediately but starts an asynchronous commit.
More detail is here.
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PowerShell script to return versions of .NET Framework on a machine?
..."\|$" |
# Then we can build the table by looking for unique lines that start with ".NET Framework"
Select-String "^.NET" | Select-Object -Unique |
# And flip it so it's key = value
# And convert ".NET FRAMEWORK 4.5.2" to [version]4.5.2
ForEach-Object {
[version]$v, [int...
How to trim a string to N chars in Javascript?
...ust use substring... string.substring(0, 7); The first argument (0) is the starting point. The second argument (7) is the ending point (exclusive). More info here.
var string = "this is a string";
var length = 7;
var trimmedString = string.substring(0, length);
...
Structure padding and packing
... the order of the members will be preserved and that the first member will start at 0 offset.
– martinkunev
Dec 8 '17 at 14:32
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Creating C formatted strings (not printing them)
...per(const char *format, ...) {
char* string;
va_list args;
va_start(args, format);
if(0 > vasprintf(&string, format, args)) string = NULL; //this is for logging, so failed allocation is not fatal
va_end(args);
if(string) {
log_out(string);
free(str...
How to 'insert if not exists' in MySQL?
I started by googling, and found this article which talks about mutex tables.
10 Answers
...
MySQL maximum memory usage
...th EXPLAIN. Add to that that MySQL's EXPLAIN is really limited, but it's a start.
Suggested configurations
About these my-large.cnf and my-medium.cnf files -- I don't even know who those were written for. Roll your own.
Tuning primer
A great start is the tuning primer. It's a bash script (hint: ...