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How to properly seed random number generator
...entered manually by a human; excluding 0, O, 1, and l can help reduce user error.
var alpha = "abcdefghijkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789"
// generates a random string of fixed size
func srand(size int) string {
buf := make([]byte, size)
for i := 0; i < size; i++ {
...
Is there a link to GitHub for downloading a file in the latest release of a repository?
...-N to only download if the file is newer but S3 was giving a 403 Forbidden error.
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MongoDB副本集详解 优于以往的主从模式 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...以自动投票，选举出新的Master，并引导其余的Slave服务器连接新的Master，
而这个过程对于应用是透明的。可以说MongoDB的副本集是自带故障转移功能的主从复制。
1 相对于传统主从模式的优势
传统的主从模式，需要手工指定...
Python mysqldb: Library not loaded: libmysqlclient.18.dylib
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I had installed mysql55 via MacPorts and to solve this error did: sudo ln -s mysql/libmysqlclient.18.dylib /opt/local/lib/mysql55/libmysqlclient.18.dylib
– philfreo
May 16 '12 at 20:12
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Relative paths based on file location instead of current working directory [duplicate]
... [[ -L $target || -e $target ]] || { command printf '%s\n' "$FUNCNAME: ERROR: '$target' does not exist." >&2; return 1; }
command cd "$(command dirname -- "$target")" # Change to target dir; necessary for correct resolution of target path.
fname=$(command basename -- "$target"...
How to make a great R reproducible example
...monstrate the problem
the minimal runnable code necessary to reproduce the error, which can be run on the given dataset
the necessary information on the used packages, R version, and system it is run on.
in the case of random processes, a seed (set by set.seed()) for reproducibility1
For examples ...
Find a class somewhere inside dozens of JAR files?
...rom the output of the jar command, for the given class name; this will set ERRORLEVEL to 1 iff there's a match (otherwise 0).
&& echo %G - iff ERRORLEVEL is non-zero, write the Java archive file name to standard output (the console).
Web
Use a search engine that scans JAR files.
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Command not found when using sudo
...or "other")
Here's a summary of how to troubleshoot the Permission Denied error in your case.
$ ls -l foo.sh # Check file permissions of foo
-rw-r--r-- 1 rkielty users 0 2012-10-21 14:47 foo.sh
^^^
^^^ | ^^^ ^^^^^^^ ^^^^^
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Owner| World | ...
Using sed and grep/egrep to search and replace
...tand why though since it makes sense... the -l part of xargs was giving me errors so I took it out, could that be related?
– Ori
Jul 23 '09 at 6:43
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Copy a table from one database to another in Postgres
...up, you should use the -a flag to import data only, else you may see weird errors like "Out of memory":
pg_dump -a -t my_table my_db | psql target_db
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