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How can I repeat a character in Bash?
...o the command becomes:
printf '=%.0s' 1 2 3 4 ... 100
I've set printf's format to =%.0s which means that it will always print a single = no matter what argument it is given. Therefore it prints 100 =s.
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Get statistics for each group (such as count, mean, etc) using pandas GroupBy?
...is creates four count columns, but how to get only one? (The question asks for "an additional column" and that's what I would like too.)
– Jaan
Jul 22 '15 at 6:58
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RegEx for matching UK Postcodes
...plex UK postcode only within an input string. All of the uncommon postcode forms must be covered as well as the usual. For instance:
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Set every cell in matrix to 0 if that row or column contains a 0
... [1, 1, 1, 1, 1]]
N = len(m)
### pass 1
# 1 rst line/column
c = 1
for i in range(N):
c &= m[i][0]
l = 1
for i in range(1,N):
l &= m[0][i]
# other line/cols
# use line1, col1 to keep only those with 1
for i in range(1,N):
for j in range(1,N):
if m[i][j] == 0:
...
C++常用排序算法汇总 - C/C++ - 清泛网 - 专注C/C++及内核技术
...为从小到大
*/
void Select_Sort1(int *arr,int len)
{
int i,j;
for(i=0;i<len;i++)
for(j=i+1;j<len;j++)
if(arr[i] > arr[j])
{
int exchange = arr[i];
arr[i] = arr[j];
arr[j] = exchange;
}
}
/*
第二种形式的选择排序，减少了元素互换的操作
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Bomb dropping algorithm
I have an n x m matrix consisting of non-negative integers. For example:
32 Answers
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How do you detect Credit card type based on number?
...EC 7812, and can be used to determine the type of card from the number.
Unfortunately the actual ISO/IEC 7812 database is not publicly available, however, there are unofficial lists, both commercial and free, including on Wikipedia.
Anyway, to detect the type from the number, you can use a regular...
Find row where values for column is maximal in a pandas DataFrame
How can I find the row for which the value of a specific column is maximal ?
8 Answers
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Python and pip, list all versions of a package that's available?
... latest version. Chris's answer seems to have the most upvotes and worked for me)
The script at pastebin does work. However it's not very convenient if you're working with multiple environments/hosts because you will have to copy/create it every time.
A better all-around solution would be to use ...
Are +0 and -0 the same?
...c, −0 = +0 = 0. However, in computing, some number representations allow for the existence of two zeros, often denoted by −0 (negative zero) and +0 (positive zero). This occurs in some signed number representations for integers, and in most floating point number representations. The number 0 is ...