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What is the best way to use a HashMap in C++?
...rgv)
{
std::map<std::string, int> m;
m["hello"] = 23;
// check if key is present
if (m.find("world") != m.end())
std::cout << "map contains key world!\n";
// retrieve
std::cout << m["hello"] << '\n';
std::map<std::string, int>::iterator i = m.find("hel...
Add data annotations to a class generated by entity framework
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did you miss the partial modifier? Do you use the same namespace?
– MUG4N
May 14 '15 at 7:59
5
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Map to String in Java
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@wheeler toString() isn't declared in Map and if it were: Map has 21 implementing classes. Which of them should be preferred over the others when the implementation actually used is only known at runtime?
– Gerold Broser
Jul 17 at 2...
is it possible to update UIButton title/text programmatically?
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Do you have the button specified as an IBOutlet in your view controller class, and is it connected properly as an outlet in Interface Builder (ctrl drag from new referencing outlet to file owner and select your UIButton object)? That's usually the pro...
How do I set a column value to NULL in SQL Server Management Studio?
...ld set the entire column to null as the Question Title asks.
To set a specific row on a specific column to null use:
Update myTable set MyColumn = NULL where Field = Condition.
This would set a specific cell to null as the inner question asks.
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$(this) inside of AJAX success not working
...was bound to. Learn more about how this works in JavaScript.
Solutions
If ES2015+ is available to you, then using an arrow function would probably be the simplest option:
$.ajax({
//...
success: (json) => {
// `this` refers to whatever `this` refers to outside the function
...
Aligning a float:left div to center?
...ck; instead of float
you can't centre floats, but inline-blocks centre as if they were text, so on the outer overall container of your "row" - you would set text-align: center; then for each image/caption container (it's those which would be inline-block;) you can re-align the text to left if you ...
What is the difference between assert, expect and should in Chai?
What is the difference between assert , expect and should , and when to use what?
2 Answers
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Logical Operators, || or OR?
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There is no "better" but the more common one is ||. They have different precedence and || would work like one would expect normally.
See also: Logical operators (the following example is taken from there):
// The result of the expression (false || true) is assigned to $e
// Acts like: ...
How to force keyboard with numbers in mobile website in Android
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Will take a look at it today, and then will let you know if that would work. Thank you, Richard!
– ncakmak
Dec 1 '10 at 17:25
1
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