大约有 47,000 项符合查询结果（耗时：0.0517秒） [XML]
Set TextView text from html-formatted string resource in XML
...
|
show 10 more comments
129
...
boost Composite keys - C/C++ - 清泛网 - 专注C/C++及内核技术
...keysComposite keysIn relational databases, composite keys depend on two or more fields of a given table The analogous concept in Boost MultiIndex is Composite keys
In relational databases, composite keys depend on two or more fields of a given table. The analogous concept in Boost.MultiIndex is ...
How to 'minify' Javascript code
...hould use try catch
var x;
try{x=a.b.c.d.e}catch(e){}
!x||conole.log(x);
more if
if(a==1||a==3||a==5||a==8||a==9){
console.log('yes')
}else{
console.log('no');
}
console.log([1,3,5,8,9].indexOf(a)!=-1?'yes':'no');
but indexOf is slow read this https://stackoverflow.com/a/30335438/2450730
nu...
Laravel Eloquent Sum of relation's column
...t executing it until something like ->sum() is called.The latter can be more efficient, as it avoids transferring unnecessary information from the database into memory.
– Siegen
Feb 19 '19 at 7:55
...
How do I wrap link_to around some html ruby code?
...
If you have a more complex path, you can just add in the parameters, missing the initial content, e.g. <%= link_to some_path, method: :post %>
– Obromios
Aug 3 '17 at 22:59
...
How do I retrieve the number of columns in a Pandas data frame?
...rocessing speed sometimes, but I value my coding time and code readability more than a few seconds of processing time. In this particular case: if you learn that the number of rows can be calculated with len(df.index), next time you need the number of columns it comes natural to do len(df.columns).
...
How do I design a class in Python?
...r namedtuples, and you don't need to do very much work. Other classes are more complex, either because of complex derived data or because of some update/mutation which is performed.
Don't forget to test each class in isolation using unittest.
Also, there's no law that says classes must be mutabl...
“implements Runnable” vs “extends Thread” in Java
...
|
show 25 more comments
583
...
How to install trusted CA certificate on Android device?
...asy. Installing new certificates as 'system trusted'-certificates requires more work (and requires root access), but it has the advantage of avoiding the Android lockscreen requirement.
From Android N onwards it gets a littler harder, see this extract from the Charles proxy website:
As of Andr...