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What is a lambda (function)?
... x % 2 == 0; // Tests if the parameter is even.
boolean result = pred.test(4); // true
Lua
adder = function(x)
return function(y)
return x + y
end
end
add5 = adder(5)
add5(1) == 6 -- true
Kotlin
val pred = { x: Int -> x % 2 == 0 }
val result = pred(4) // true
Ruby
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How to check that a string is an int, but not a double, etc.?
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This will only work if your input is always a string:
$numeric_string = '42';
$integer = 42;
ctype_digit($numeric_string); // true
ctype_digit($integer); // false
If your input might be of type int, then combine ctype_digit with is_int.
If you care about negative numbers, then ...
Remove duplicate values from JS array [duplicate]
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54 Answers
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What is the difference between == and equals() in Java?
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641
In general, the answer to your question is "yes", but...
.equals(...) will only compare what...
Logical operator in a handlebars.js {{#if}} conditional
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edited Jun 10 '13 at 18:24
Peter Bratton
5,93455 gold badges3333 silver badges6060 bronze badges
answer...
Get users by name property using Firebase
...ld attribute (for example, all users with name === "Alex").
In October 2014, Firebase rolled out new querying functionality via the orderByChild() method, that enables you to do this type of query quickly and efficiently. See the updated answer below.
When writing data to Firebase, you have a f...
Favicon not showing up in Google Chrome [duplicate]
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4 Answers
4
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Why does !{}[true] evaluate to true in JavaScript?
{}[true] is [true] and ![true] should be false .
10 Answers
10
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C++ Erase vector element by value rather than by position? [duplicate]
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4 Answers
4
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