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C++ Const Usage Explanation
...
Read this: https://isocpp.org/wiki/faq/const-correctness
The final const means that the function Method3 does not modify the non mutable members of its class.
const int* const means a constant pointer to a constant int: i.e. a poi...
How do I check whether a checkbox is checked in jQuery?
... DOM element will give you the checked state of the element.
Given your existing code, you could therefore do this:
if(document.getElementById('isAgeSelected').checked) {
$("#txtAge").show();
} else {
$("#txtAge").hide();
}
However, there's a much prettier way to do this, using toggle:
...
Is there a better way to find out if a local git branch exists?
...following command to find out if a local git branch with branch-name exists in my repository. Is this correct? Is there a better way?
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Random row from Linq to Sql
What is the best (and fastest) way to retrieve a random row using Linq to SQL when I have a condition, e.g. some field must be true?
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onMeasure custom view explanation
...ld I write my onMeasure method? I've seen couple tutorials, but each one is a little bit different than the other. Sometimes they call super.onMeasure at the end, sometimes they use setMeasuredDimension and didn't call it. Where is a difference?
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Extracting bits with a single multiplication
...byte manipulated. Using unsigned 8 bit for simplicity. Imagine your number is xxaxxbxx and you want ab000000.
The solution consisted of two steps: a bit masking, followed by multiplication. The bit mask is a simple AND operation that turns uninteresting bits to zeros. In the above case, your mask w...
Static class initializer in PHP
...zation stuff here
}
public static function getInstance()
{
if ( is_null( self::$instance ) )
{
self::$instance = new self();
}
return self::$instance;
}
public function someMethod1()
{
// whatever
}
public function someMethod2()
{
// whatever
}
}
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In C# check that filename is *possibly* valid (not that it exists) [duplicate]
Is there a method in the System.IO namespace that checks the validity of a filename?
14 Answers
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Is there an “exists” function for jQuery?
How can I check the existence of an element in jQuery?
43 Answers
43
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How to append something to an array?
..."];
// append multiple values to the array
arr.push("Salut", "Hey");
// display all values
for (var i = 0; i < arr.length; i++) {
console.log(arr[i]);
}
Update
If you want to add the items of one array to another array, you can use firstArray.concat(secondArray):
var arr = [
"app...