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Pretty-print C++ STL containers
... template<typename T, typename TTraits, typename TAllocator> class set;
template<typename TKey, typename TValue, typename TTraits, typename TAllocator> class map;
}
// Basic is_container template; specialize to derive from std::true_type for all desired container types
template<...
Catching error codes in a shell pipe
...al to extend to a 4-part or N-part pipeline.
Simple experimentation with 'set -e' didn't help.
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How to get min/max of two integers in Postgres/SQL?
...
Have a look at GREATEST and LEAST.
UPDATE my_table
SET my_column = GREATEST(my_column - 10, 0);
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OpenShift rhc setup using multiple accounts
I have two accounts on Openshift platform. How can I setup my computer so that I can manage both of them with rhc ? I cannot find any relevant option in the command line arguments.
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What is the difference between min SDK version/target SDK version vs. compile SDK version?
...rgmrDev If your app crashes on versions lower than 21, you should probably set your min SDK version to 21. This will not actually fix your application on targets lower than 21, it will just note that your app is unsupported on lower versions. You also have the option of determining what exactly is b...
How to implement a confirmation (yes/no) DialogPreference?
...ample of how an alert dialog can be built.
new AlertDialog.Builder(this)
.setTitle("Title")
.setMessage("Do you really want to whatever?")
.setIcon(android.R.drawable.ic_dialog_alert)
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInt...
Adding command line options to CMake
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Yeah, you should use the option command. You can set options from the command line this way:
//CMakeLists.txt
option(MyOption "MyOption" OFF)
//Command line
cmake -DMyOption=ON MyProjectFolder
Note that -DMyOption must come before the path.
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How to read the mode field of git-ls-tree's output
...al UNIX notations.
First two digits show file type, the third one is about set-uid/set-gid/sticky bits, and you know the last three.
Here is how man 2 stat documents it on my GNU/Linux system:
The following flags are defined for the st_mode field:
S_IFMT 0170000 bit mask for the f...
How to remove debugging from an Express app?
... This is coming from socket.io. You can disable this by configuration:
io.set('log level', 1); // reduce logging
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Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
...ery elegant):
difference <-
data.frame(lapply(1:ncol(a1),function(i)setdiff(a1[,i],comparison$tM[,i])))
colnames(difference) <- colnames(a1)
difference
# a b
#1 4 d
#2 5 e
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