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How to write a simple database engine [closed]
...rt of each column to have the length of this column
like "Adam", 1, 11.1, "123 ABC Street POBox 456"
you can have it like
<&RowHeader, 1><&Col1,CHR, 4>Adam<&Col2, num,1,0>1<&Col3, Num,2,1>111<&Col4, CHR, 24>123 ABC Street POBox 456<&RowTrailer...
Oracle: how to UPSERT (update or insert into a table?)
...hioned way"):
begin
insert into t (mykey, mystuff)
values ('X', 123);
exception
when dup_val_on_index then
update t
set mystuff = 123
where mykey = 'X';
end;
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How can I change Mac OS's default Java VM returned from /usr/libexec/java_home
...dkhome="`/usr/libexec/java_home -v '1.7*'`"
and this will force it to choose Java 7 instead of 8.
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How can I install Apache Ant on Mac OS X?
...
Ant is already installed on some older versions of Mac OS X, so you should run ant -version to test if it is installed before attempting to install it.
If it is not already installed, then your best bet is to install Homebrew (brew install ant) or MacPorts (sudo port install ap...
AngularJS : Factory and Service? [duplicate]
...module('myApp').factory('myFactory', function() {
var _myPrivateValue = 123;
return {
privateValue: function() { return _myPrivateValue; }
};
});
// Service
function MyService() {
this._myPrivateValue = 123;
}
MyService.prototype.privateValue = function() {
return this._myPrivate...
Matplotlib - Move X-Axis label downwards, but not X-Axis Ticks
...red Jul 29 '14 at 14:57
Matthias123Matthias123
79266 silver badges1313 bronze badges
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How to convert index of a pandas dataframe into a column?
...
df1 = pd.DataFrame({"gi":[232,66,34,43],"ptt":[342,56,662,123]})
p = df1.index.values
df1.insert( 0, column="new",value = p)
df1
new gi ptt
0 0 232 342
1 1 66 56
2 2 34 662
3 3 43 123
...
How do you normalize a file path in Bash?
...
For those of you what need a OS X solution, check out Adam Liss' answer below.
– Trenton
May 22 '16 at 6:16
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How can I remove a character from a string using Javascript?
...et of charcters> could be characters described by a character class:
/[123!y]/
//any one of these
/[^123!y]/
//anything but one of the chars following '^' (very useful/performance enhancing btw)
Or expanded on to match a quantity of characters (but still best to think of as a single element in...
Where is virtualenvwrapper.sh after pip install?
I'm trying to setup virtualenvwrapper on OSX, and all the instructions and tutorials I've found tell me to add a source command to .profile, pointing towards virtualenvwrapper.sh. I've checked all the python and site-packages directories, and I can't find any virtualenvwrapper.sh. Is this something ...