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lexers vs parsers
... plain-text. So it'll tokenize the SGML document into a series of tokens: [TXT][TAG][TAG][TXT][TAG][TXT]....
As you can see, parsers and tokenizers have much in common. One parser can be a tokenizer for other parser, which reads its input tokens as symbols from its own alphabet (tokens are simply...
REST API Best practices: Where to put parameters? [closed]
...space then use a path segment. e.g. a language parameter /en/document/foo.txt versus /document/foo.txt?language=en
I prefer unique identifiers to be in a path segment rather than a query parameter.
The official rules for URIs are found in this RFC spec here. There is also another very useful R...
MySQL复制的概述、安装、故障、技巧、工具 - 数据库(内核) - 清泛网 - 专注...
...新CHANGE MASTER TO即可，系统会抛弃当前的中继日志，重新下载：
mysql> CHANGE MASTER TO
MASTER_LOG_FILE='<Relay_Master_Log_File>',
MASTER_LOG_POS=<Exec_Master_Log_Pos>;
mysql> START SLAVE;
至于为什么使用的是Relay_Master_Log_File & Exec_Master_Log_Pos...
How do I add files without dots in them (all extension-less files) to the gitignore file?
...!" for patterns that begin with a literal "!", for example,
"!important!.txt".
If the pattern ends with a slash, it is removed for the purpose of the
following description, but it would only find a match with a
directory. In other words, foo/ will match a directory foo and paths
underne...
Servlet for serving static content
...g request could navigate trough the file system: files/%2e%2e/mysecretfile.txt. This request produces files/../mysecretfile.txt. I tested it on Tomcat 7.0.55. They call it a directory climbing: owasp.org/index.php/Path_Traversal
– Cristian Arteaga
Aug 4 '18 at ...
How do I append text to a file?
....bashrc:
set -o noclobber
Now when you try to do echo "hello" > file.txt you will get a warning saying cannot overwrite existing file.
To force writing to the file you must now use the special syntax:
echo "hello" >| <filename>
You should also know that by default echo adds a trai...
How to swap keys and values in a hash
...
files = {
'Input.txt' => 'Randy',
'Code.py' => 'Stan',
'Output.txt' => 'Randy'
}
h = Hash.new{|h,k| h[k] = []} # Create hash that defaults unknown keys to empty an empty list
files.map {|k,v| h[v]<< k} #append each key to ...
Convert blob URL to normal URL
... <a href="blob:example.com/xxxx-xxxx-xxxx-xxxx" download="abc.txt">download</a>. It should work. When it will hit the href, it will rename the blob to abc.txt & download
– P Satish Patro
Apr 23 '19 at 6:53
...
How to use sed to replace only the first occurrence in a file?
...nu>/s/<Menu>/<Menu><Menu>Sub menu<\/Menu>/' try.txt > abc.txt
Editor's note: both work with GNU sed only.
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How to run only one task in ansible playbook?
..._s3:
bucket: ansiblebucket1234567890
object: /my/desired/key.txt
src: /etc/ansible/myfile.txt
mode: put
tags:
- putfile
- name: Create an empty bucket
aws_s3:
bucket: ansiblebucket12345678901234
mode: create
permission: private
tags:
...