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Get all column names of a DataTable into string array using (LINQ/Predicate)
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– Daniel Hilgarth
May 17 '13 at 8:08
3
@FLICKER: Some thinking is still required as a developer...
Select random lines from a file
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edited Jun 16 '16 at 20:48
DomainsFeatured
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an...
How to see if an NSString starts with a certain other string?
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answered Oct 28 '11 at 20:43
CyrilleCyrille
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JavaScript seconds to time string with format hh:mm:ss
...tring.prototype.toHHMMSS = function () {
var sec_num = parseInt(this, 10); // don't forget the second param
var hours = Math.floor(sec_num / 3600);
var minutes = Math.floor((sec_num - (hours * 3600)) / 60);
var seconds = sec_num - (hours * 3600) - (minutes * 60);
if (hours &...
My docker container has no internet
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110
First thing to check is run cat /etc/resolv.conf in the docker container. If it has an invalid D...
How do I rename all files to lowercase?
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answered Oct 16 '11 at 20:39
wjlwjl
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How can I check whether a numpy array is empty or not?
...e a look at the .size attribute. It is defined as an integer, and is zero (0) when there are no elements in the array:
import numpy as np
a = np.array([])
if a.size == 0:
# Do something when `a` is empty
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Pure virtual destructor in C++
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220
Yes. You also need to implement the destructor:
class A {
public:
virtual ~A() = 0;
};
inl...
Is it better to reuse a StringBuilder in a loop?
...ion {
long time = System.currentTimeMillis();
for( int i = 0; i < 10000000; i++ ) {
StringBuilder sb = new StringBuilder();
sb.append( "someString" );
sb.append( "someString2"+i );
sb.append( "someStrin4g"+i );
sb.append(...
Best way to reverse a string
I've just had to write a string reverse function in C# 2.0 (i.e. LINQ not available) and came up with this:
48 Answers
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