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Validate that a string is a positive integer
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Two answers for you:
Based on parsing
Regular expression
Note that in both cases, I've interpreted "positive integer" to include 0, even though 0 is not positive. I include notes if you want to disallow 0.
Based on Parsing
If you wa...
How to find first element of array matching a boolean condition in JavaScript?
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Since ES6 there is the native find method for arrays; this stops enumerating the array once it finds the first match and returns the value.
const result = someArray.find(isNotNullNorUndefined);
Old answer:
I have to post an answer to stop these filter suggestions :-...
Java LinkedHashMap get first or last entry
I have used LinkedHashMap because it is important the order in which keys entered in the map.
14 Answers
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How do I redirect in expressjs while passing some context?
...here are a few ways of passing data around to different routes. The most correct answer is, of course, query strings. You'll need to ensure that the values are properly encodeURIComponent and decodeURIComponent.
app.get('/category', function(req, res) {
var string = encodeURIComponent('somethin...
CSS: fixed position on x-axis but not y?
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Update Credit: @PierredeLESPINAY
As commented, to make the script support the changes in the css without having to recode them in the script. You can use the following.
var leftOffset = parseInt($("#header").css('left')); //Grab the left position left first
$(window).scroll(function(){
$('...
What is the rationale for all comparisons returning false for IEEE754 NaN values?
...differently from all other values?
That is, all comparisons with the operators ==, =, where one or both values is NaN returns false, contrary to the behaviour of all other values.
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Why is there no Constant feature in Java?
...have learned that Java allows us to declare constants by using final keyword.
8 Answers
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How to manage client-side JavaScript dependencies? [closed]
... my needs to have a coherent client side JavaScript dependency management workflow. I want to satisfy these 5 requirements:
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How to convert PascalCase to pascal_case?
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Try this on for size:
$tests = array(
'simpleTest' => 'simple_test',
'easy' => 'easy',
'HTML' => 'html',
'simpleXML' => 'simple_xml',
'PDFLoad' => 'pdf_load',
'startMIDDLELast' => 'start_middle_last',
'ASt...
Fixed point vs Floating point number
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A fixed point number has a specific number of bits (or digits) reserved for the integer part (the part to the left of the decimal point) and a specific number of bits reserved for the fractional part (the part to the right of the decimal point). No matter how large or small yo...