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Converting an integer to a string in PHP
...depends on your context.
$var = 5;
// Inline variable parsing
echo "I'd like {$var} waffles"; // = I'd like 5 waffles
// String concatenation
echo "I'd like ".$var." waffles"; // I'd like 5 waffles
// The two examples above have the same end value...
// ... And so do the two below
// Explicit c...
What is more efficient: Dictionary TryGetValue or ContainsKey+Item?
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TryGetValue will be faster.
ContainsKey uses the same check as TryGetValue, which internally refers to the actual entry location. The Item property actually has nearly identical code functionality as TryGetValue, except that it will throw an exception instead ...
Why does (0 < 5 < 3) return true?
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Alan GeleynseAlan Geleynse
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How to make a background 20% transparent on Android
How do I make the background of a Textview about 20% transparent (not fully transparent), where there is a color in the background (i.e. white)?
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How to round a number to n decimal places in Java
What I would like is a method to convert a double to a string which rounds using the half-up method - i.e. if the decimal to be rounded is 5, it always rounds up to the next number. This is the standard method of rounding most people expect in most situations.
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What's the main difference between int.Parse() and Convert.ToInt32
...ver the situation when the user enters invalid input.
Convert.ToInt32() takes an object as its argument. (See Chris S's answer for how it works)
Convert.ToInt32() also does not throw ArgumentNullException when its argument is null the way Int32.Parse() does. That also means that Convert.ToInt32() ...
how to change an element type using jquery
... attrs).append($(this).contents());
});
Example: http://jsfiddle.net/yapHk/
Update, here's a plugin:
(function($) {
$.fn.changeElementType = function(newType) {
var attrs = {};
$.each(this[0].attributes, function(idx, attr) {
attrs[attr.nodeName] = attr.nodeValue...
C# Double - ToString() formatting with two decimal places but no rounding
...ing:
string s = string.Format("{0:N2}%", x); // No fear of rounding and takes the default number format
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Multiple lines of text in UILabel
Is there a way to have multiple lines of text in UILabel like in the UITextView or should I use the second one instead?
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Sample random rows in dataframe
...d the appropriate function that would return a specified number of rows picked up randomly without replacement from a data frame in R language? Can anyone help me out?
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