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How can I strip first X characters from string using sed?
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This doesn't seem to work, and if it does, can you explain how
– Alexander Mills
Jul 3 '19 at 3:29
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How can I determine the type of an HTML element in JavaScript?
... element name capitalized and without the angle brackets, which means that if you want to check if an element is an <div> element you could do it as follows:
elt.nodeName == "DIV"
While this would not give you the expected results:
elt.nodeName == "<div>"
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Why CancellationToken is separate from CancellationTokenSource?
... to encourage successful patterns and discourage anti-patterns without sacrificing performance.
If the door was left open for misbehaving APIs, then the usefulness of the cancellation design could quickly be eroded.
CancellationTokenSource == "cancellation trigger", plus generates linked listene...
How to position a DIV in a specific coordinates?
I want to position a DIV in a specific coordinates ? How can I do that using Javascript ?
6 Answers
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What is the use of the square brackets [] in sql statements?
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The brackets are required if you use keywords or special chars in the column names or identifiers. You could name a column [First Name] (with a space)--but then you'd need to use brackets every time you referred to that column.
The newer tools add th...
Changing one character in a string
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Don't modify strings.
Work with them as lists; turn them into strings only when needed.
>>> s = list("Hello zorld")
>>> s
['H', 'e', 'l', 'l', 'o', ' ', 'z', 'o', 'r', 'l', 'd']
>>> s[6] = 'W'
>>>...
Find and extract a number from a string
...tring b = string.Empty;
int val;
for (int i=0; i< a.Length; i++)
{
if (Char.IsDigit(a[i]))
b += a[i];
}
if (b.Length>0)
val = int.Parse(b);
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Pointer arithmetic for void pointer in C
... ..) is incremented, its value is increased by the size of that data type. If a void pointer which points to data of size x is incremented, how does it get to point x bytes ahead? How does the compiler know to add x to value of the pointer?
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ContextLoaderListener or not?
...'s no reason to keep the ContextLoaderListener and applicationContext.xml. If your app works fine with just the servlet's context, that stick with that, it's simpler.
Yes, the generally-encouraged pattern is to keep non-web stuff in the webapp-level context, but it's nothing more than a weak conven...
How can I output the value of an enum class in C++11
...will work for any scoped enum. The solution employs SFINAE via std::enable_if and is as follows.
#include <iostream>
#include <type_traits>
// Scoped enum
enum class Color
{
Red,
Green,
Blue
};
// Unscoped enum
enum Orientation
{
Horizontal,
Vertical
};
// Another...