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How to evaluate a math expression given in string form?
... instructions please visit project website (especially tutorial section).
https://mathparser.org/
https://mathparser.org/mxparser-tutorial/
https://mathparser.org/api/
And few examples
1 - Simple furmula
Expression e = new Expression("( 2 + 3/4 + sin(pi) )/2");
double v = e.calculate()
2 - U...
NoSQL - MongoDB vs CouchDB [closed]
...plications based on support, expandability, management, and cost.
http://www.gartner.com/technology/reprints.do?id=1-23A415Q&ct=141020&st=sb
I would like to suggest Couchbase to anyone who's not tried it yet, but not based on the version that is shown in the report (2.5.1) because it is n...
SQLite Concurrent Access
...n tell, there are no exceptions to that. The details are on SQLite's site: https://www.sqlite.org/lockingv3.html
This statement is of interest: "The pager module makes sure changes happen all at once, that either all changes occur or none of them do, that two or more processes do not try to access ...
What's the difference between the atomic and nonatomic attributes?
...
@HotLicks Another fun one; on certain architectures (Can't remember which one), 64 bit values passed as an argument might be passed half in a register and half on the stack. atomic prevents cross-thread half-value reads. (That was a fun bu...
How to set custom header in Volley Request
...equestQueue queue = Volley.newRequestQueue(this);
String url = "http://www.somewebsite.com";
StringRequest getRequest = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>()
{
@Override
public void onResponse(String respons...
Container-fluid vs .container
... explain so lets look at the examples
Example one
container-fluid:
http://www.bootply.com/119981
So you see how the container takes up the whole screen...that's a container-fluid.
Now lets look at the other just a normal container and watch the edges of the preview
Example two
container
http://www....
Worth switching to zsh for casual use? [closed]
...ng it is pretty easy, grab the bash-completion-20060301.tar.gz from http://www.caliban.org/bash/index.shtml#completion and extract it with
tar -xzvf bash-completion-20060301.tar.gz
then copy the bash_completion/bash_completion file to /etc with
sudo cp bash_completion/bash_completion /etc
wh...
从Code Review 谈如何做技术 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...我唠叨。
（全文完）
文章转自： 酷 壳 – CoolShell.cn
Code Review,重要性,代码质量
Convert Unicode to ASCII without errors in Python
... of io
Then you can parse the content out like this:
response = urlopen("https://example.com/gzipped-ressource")
buffer = io.BytesIO(response.read()) # Use StringIO.StringIO(response.read()) in Python 2
gzipped_file = gzip.GzipFile(fileobj=buffer)
decoded = gzipped_file.read()
content = decoded.de...
HTML5 Email Validation
...
The input type=email page of the www.w3.org site notes that an email address is any string which matches the following regular expression:
/^[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/
Use the required attribute and a patter...