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How to get Last record from Sqlite?
...LE);
OR
you can also used following solution:
SELECT * FROM tablename ORDER BY column DESC LIMIT 1;
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How does one reorder columns in a data frame?
...s keep all the rows, and the 1,2,3,4 refers to the columns.
To change the order as in the above question do df2[,c(1,3,2,4)]
If you want to output this file as a csv, do write.csv(df2, file="somedf.csv")
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Do asynchronous operations in ASP.NET MVC use a thread from ThreadPool on .NET 4
...time of execution is less compared to if you run them sequentially. But in order to run them you use worker threads. Well actually EF is lazy so when you do _context.Foo you are actually not executing anything. You are just building an expression tree. Be extremely careful with this. The query execu...
How do I reverse a C++ vector?
...se vector of vectors? I want v[0] to be swapped with v[v.size()-1] and the order of v[0][i] element remain as it is. This is similar to changing order of rows (if a vector is viewed as a Matrix). If a vector is defined as: vector<vector<int> > v; reverse(v.begin(), v.end()) doesn't rever...
Unique combination of all elements from two (or more) vectors
...3 ABC 2012-05-05
14 DEF 2012-05-05
15 GHI 2012-05-05
If the resulting order isn't what you want, you can sort afterwards. If you name the arguments to expand.grid, they will become column names:
df = expand.grid(a = a, b = b)
df[order(df$a), ]
And expand.grid generalizes to any number of inp...
What's the difference between detaching a Fragment and removing it?
...ed, its onPause, onStop and onDestroyView methods are called only (in that order). On the other hand, when a Fragment is removed, its onPause, onStop, onDestroyView, onDestroy and onDetach methods are called (in that order). Similarly, when attaching, the Fragment's onCreateView, onStart and onResum...
What does it mean to hydrate an object?
...t Java-centric, as I mostly have used the term "hydration" with regards to PHP actually. The answer to the question "What does hydrating an object mean?" is "filling an existing object with data." The object has to exist before you can hydrate it, which is not true for deserialization. deserializ...
Convert char to int in C and C++
...the representations of the 10 decimal digits are contiguous and in numeric order.
– Ben Voigt
Apr 17 '17 at 0:16
2
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How to compare if two structs, slices or maps are equal?
...imple integers. Are slices equal if they contain same elements in the same order? But what if their capacities differ? Etc.
– justinas
Jul 12 '14 at 15:45
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How to move an iFrame in the DOM without losing its state?
...The basic idea is to create a flex-box wrapper and then define an specific order for the iframes using the order attribute on each iframe wrapper.
<style>
.container{
display: flex;
flex-direction: column;
}
</style>
<div class="container">
<div id="wrap1" style="...