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deleting rows in numpy array
... [7,8,9]])
To delete the first row, do this:
x = numpy.delete(x, (0), axis=0)
To delete the third column, do this:
x = numpy.delete(x,(2), axis=1)
So you could find the indices of the rows which have a 0 in them, put them in a list or a tuple and pass this as the second argument of the...
How to validate an e-mail address in swift?
...ValidEmail(_ email: String) -> Bool {
let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
let emailPred = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
return emailPred.evaluate(with: email)
}
for versions of Swift earlier than 3.0:
func isValidEmail(e...
Any reason not to use '+' to concatenate two strings?
...
|
edited Jan 10 '16 at 12:44
seriousdev
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...
Getting the array length of a 2D array in Java
... };
System.out.println(foo.length); //2
System.out.println(foo[0].length); //3
System.out.println(foo[1].length); //4
}
Column lengths differ per row. If you're backing some data by a fixed size 2D array, then provide getters to the fixed values in a wrapper class.
...
Why does ('0' ? 'a' : 'b') behave different than ('0' == true ? 'a' : 'b') [duplicate]
...
208
+500
First, ...
C++常用排序算法汇总 - C/C++ - 清泛网 - 专注C/C++及内核技术
...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
选...
How can I repeat a character in Bash?
...
410
You can use:
printf '=%.0s' {1..100}
How this works:
Bash expands {1..100} so the command be...
Add a common Legend for combined ggplots
...
108
Update 2015-Feb
See Steven's answer below
df1 <- read.table(text="group x y
gro...
How to plot two histograms together in R?
...gle numeric column which lists the length of all measured carrots (total: 100k carrots) and cucumbers (total: 50k cucumbers).
...
Hide separator line on one UITableViewCell
...-1){
UIImageView *line = [[UIImageView alloc] initWithFrame:CGRectMake(0, 44, 320, 2)];
line.backgroundColor = [UIColor redColor];
[cell addSubview:line];
}
for iOS 7 upper versions (including iOS 8)
if (indexPath.row == self.newCarArray.count-1) {
cell.separatorInset = UIEdgeInse...
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