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Using smart pointers for class members
I'm having trouble understanding the usage of smart pointers as class members in C++11. I have read a lot about smart pointers and I think I do understand how unique_ptr and shared_ptr / weak_ptr work in general. What I don't understand is the real usage. It seems like everybody recommends using...
MySQL Insert Where query
...ySQL INSERT Syntax does not support the WHERE clause so your query as it stands will fail. Assuming your id column is unique or primary key:
If you're trying to insert a new row with ID 1 you should be using:
INSERT INTO Users(id, weight, desiredWeight) VALUES(1, 160, 145);
If you're trying to c...
Fragment in ViewPager using FragmentPagerAdapter is blank the second time it is viewed
...
I had the same issue. Changing the parent class of my PageAdapter from android.support.v4.app.FragmentPagerAdapter to android.support.v4.app.FragmentStatePagerAdapter solve my ViewPager display issue on "second time"!
sh...
What's the bad magic number error?
...hex value of first two bytes. In my case, these were 03 f3.
Open calc and convert its display mode to Programmer (Scientific in XP) to see Hex and Decimal conversion. Select "Hex" from Radio button. Enter values as second byte first and then the first byte i.e f303 Now click on "Dec" (Decimal) radi...
Finding Variable Type in JavaScript
...boxed object is created, using them as functions can be actually be useful converting from other types. Boolean(0) === false, Number(true) === 1
– Juan Mendes
Jul 16 '18 at 15:08
...
Recursion or Iteration?
...gorithms to make them faster and more efficient. He also goes over how to convert a traditional loop into a recursive function and the benefits of using tail-end recursion. His closing words really summed up some of my key points I think:
"recursive programming gives the programmer a better w...
Binding to static property
...ss is not static : declare a dummy instance of the class in the resources, and use it as the source of the binding.
<Window.Resources>
<local:VersionManager x:Key="versionManager"/>
</Window.Resources>
...
<TextBox Text="{Binding Source={StaticResource versionManager}, Path...
Hyphenated html attributes with asp.net mvc
...erscore in the data attribute name, and it'll magically handle it for you, converting it to a hyphen. It knows you want a hyphen rather than an underscore as underscores aren't valid in html attribute names.
<%= Html.TextBox("name", value, new { @data_foo = "bar"}) %>
...
Check if a given key already exists in a dictionary and increment it
...ording to his example, it should be enough to set "defaultdict(lambda: 0)" and skip the entire "if" clause.
– Deestan
Jan 23 '09 at 14:57
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Add Text on Image using PIL
...t, Which basically finds the character which will be last in each line and converts white space before this character to new-line.
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