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What is this crazy C++11 syntax ==> struct : bar {} foo {};?
...tandard abstract UDT (User-Defined Type):
struct foo { virtual void f() = 0; }; // normal abstract type
foo obj;
// error: cannot declare variable 'obj' to be of abstract type 'foo'
Let's also recall that we can instantiate the UDT at the same time that we define it:
struct foo { foo() { cout &l...
What is the way to quick-switch between tabs in Xcode 4
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edited Dec 21 '17 at 12:01
Mwiza
3,67822 gold badges2727 silver badges2626 bronze badges
answered Feb ...
How to find children of nodes using BeautifulSoup
...stChild()
– tej.tan
Jun 9 '11 at 3:20
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Inspect element that only appear when other element is mouse overed/entered
...
It's fairly easy in Chrome 38.0.2094.0.
Here's what it'll look like:
Step-by-step:
Open the DevTools in the Sources panel
Make the tooltip appear by hovering over the button
Press F8 to freeze the page
Switch to the Elements panel and use the magnify...
Convert python datetime to epoch with strftime
... since epoch you could do it explicitly:
>>> (datetime.datetime(2012,04,01,0,0) - datetime.datetime(1970,1,1)).total_seconds()
1333238400.0
In Python 3.3+ you can use timestamp() instead:
>>> datetime.datetime(2012,4,1,0,0).timestamp()
1333234800.0
Why you should not use da...
How to write a JSON file in C#?
...y places where object allocations could be reduced...... (now) Json.Net (6.0) allocates 8 times less memory than JavaScriptSerializer
Update since .Net Core 3.0
A new kid on the block since writing this is System.Text.Json which has been added to .Net Core 3.0. Microsoft makes several claims...
Android: TextView automatically truncate and replace last 3 char of String
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answered Nov 3 '09 at 13:28
NateNate
4,33411 gold badge1818 silver badges99 bronze badges
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海量数据相似度计算之simhash和海明距离 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...就拿最简单的两个数据使用Apache提供的 Levenshtein for 循环100w次计算这两个数据的相似度。代码结果如下：
String s1 = "你妈妈喊你回家吃饭哦，回家罗回家罗" ;
String s2 = "你妈妈叫你回家吃饭啦，回家罗回家罗" ;
long t1 = System.c...
How to input a regex in string.replace?
...
+150
This tested snippet should do it:
import re
line = re.sub(r"</?\[\d+>", "", line)
Edit: Here's a commented version explaining...
Difference between sampling and profiling in jVisualVM
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10
I have found that Sampling is more than accurate enough every time I've used it for pinpointing the bad performing methods. I personally nev...