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How dangerous is it to compare floating point values?
...ode that quickly breaks. Erring on the side of assuming floating point results have large random fuzz associated with them (like most of the answers here suggest) will get you code that appears to work at first but ends up having large-magnitude errors and broken corner cases.
First of all, if you ...
Differences between unique_ptr and shared_ptr [duplicate]
...ause a compile-time error. For example, this code is illegal:
unique_ptr<T> myPtr(new T); // Okay
unique_ptr<T> myOtherPtr = myPtr; // Error: Can't copy unique_ptr
However, unique_ptr can be moved using the new move semantics:
unique_ptr<T> myPtr(new T); ...
How do I get a human-readable file size in bytes abbreviation using .NET?
...o(filename).Length;
int order = 0;
while (len >= 1024 && order < sizes.Length - 1) {
order++;
len = len/1024;
}
// Adjust the format string to your preferences. For example "{0:0.#}{1}" would
// show a single decimal place, and no space.
string result = String.Format("{0:0.##}...
Difference between size_t and std::size_t
...
C's size_t and C++'s std::size_t are both same.
In C, it's defined in <stddef.h> and in C++, its defined in <cstddef> whose contents are the same as C header (see the quotation below). Its defined as unsigned integer type of the result of the sizeof operator.
C Standard says in §17...
How to merge a list of lists with same type of items to a single list of items?
... of TSources, convert each TSource in the list into an IEnumerable of TResults, then concatenate all those IEnumerables into one big one. In this case you have a list of lists to start, so if you want to concatenate them the function to map from a TSource (which is an IEnumerable of TResults) to an ...
NSPredicate: filtering objects by day of NSDate property
I have a Core Data model with an NSDate property. I want to filter the database by day. I assume the solution will involve an NSPredicate , but I'm not sure how to put it all together.
...
JavaFX Application Icon
...ed to use the following approach instead:
stage.getIcons().add(new Image(<yourclassname>.class.getResourceAsStream("icon.png")));
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What's the meaning of * (asterisk) in XAML ColumnDefinition?
...ake up any available remaining space
The * is prefixed by a number (default is 1 if no number is specified). The available space is divided among the starred columns in proportion to the prefix number.
If you have this definition
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0.07*...
The first day of the current month in php using date_modify as DateTime object
...duced in PHP 5.3). Otherwise the example above is the only way to do it:
<?php
// First day of this month
$d = new DateTime('first day of this month');
echo $d->format('jS, F Y');
// First day of a specific month
$d = new DateTime('2010-01-19');
$d->modify('first d...
Find location of a removable SD card
...urn A map of all storage locations available
*/
public static Map<String, File> getAllStorageLocations() {
Map<String, File> map = new HashMap<String, File>(10);
List<String> mMounts = new ArrayList<String>(10);
List<String> mVold...