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Convert float to double without losing precision
I have a primitive float and I need as a primitive double. Simply casting the float to double gives me weird extra precision. For example:
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UnicodeDecodeError: 'utf8' codec can't decode byte 0xa5 in position 0: invalid start byte
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On read csv, I added an encoding method:
import pandas as pd
dataset = pd.read_csv('sample_data.csv', header= 0,
encoding= 'unicode_escape')
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[完整源码实例] 修改 CListCtrl 的标题栏字体颜色；重绘 CListCtrl 标题栏 ...
...置标题栏字体的话，无需自绘CHeaderCtrl，部分代码如下：CFont *f = new CFont; f->CreateFont(13, nHeight ...如果只需设置标题栏字体的话，无需自绘CHeaderCtrl，部分代码如下：
CFont *f = new CFont;
f->CreateFont(13, // nHeight
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Make an existing Git branch track a remote branch?
... type longer commands, these are equivalent to the above two:
git branch --set-upstream-to=upstream/foo
git branch --set-upstream-to=upstream/foo foo
As of Git 1.7.0 (before 1.8.0):
git branch --set-upstream foo upstream/foo
Notes:
All of the above commands will cause local branch foo to track r...
Python Requests and persistent sessions
...alue. For localhost, web server should return cookies with domain property set to localhost.local, otherwise the cookie will not be applied to the session. In that case use 127.0.0.1 instead of localhost
– Sergey Nudnov
Apr 30 at 19:11
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Using String Format to show decimal up to 2 places or simple integer
I have got a price field to display which sometimes can be either 100 or 100.99 or 100.9, What I want is to display the price in 2 decimal places only if the decimals are entered for that price , for instance if its 100 so it should only show 100 not 100.00 and if the price is 100.2 it should displa...
How to make a SIMPLE C++ Makefile
...ol must be rebuilt.
The commands associated with each dependency line are set off with a tab (see below) should modify the target (or at least touch it to update the modification time).
Variables, Built In Rules, and Other Goodies
At this point, our makefile is simply remembering the work that ne...
How to count TRUE values in a logical vector
... can handle NA's in logical vector.
For instance:
# create dummy variable
set.seed(100)
x <- round(runif(100, 0, 1))
x <- x == 1
# create NA's
x[seq(1, length(x), 7)] <- NA
If you type in sum(x) you'll get NA as a result, but if you pass na.rm = TRUE in sum function, you'll get the resul...
C++实现一款简单完整的聊天室服务器+客户端 - C/C++ - 清泛网 - 专注C/C++及内核技术
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return 0;
}
void* ListenThread(void*ps){
int s=*(int*)ps;
fd_set listenSet;
int sock;
struct sockaddr_in clientAddr;
struct timeval timeout;
while(!toStop){
FD_ZERO(&listenSet);
FD_SET(s,&listenSet);
timeout.tv_sec = 5;
timeout.tv_usec = 0;
int...
Convert column classes in data.table
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What is the idiomatic way of doing this for a subset of columns (instead of all of them)? I've defined a character vector convcols of columns. dt[,lapply(.SD,as.numeric),.SDcols=convcols] is almost instant while dt[,convcols:=lapply(.SD,as.numeric),.SDcols=convcols] almost ...