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Copying a HashMap in Java
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Maybe i'm not understanding this but I don't need a copy of the map. I need a copy of the class that holds the map. ? There for myObjectListB has to be a class derived from MyojbectsList not a hashmap.
– user691305
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MySQL load NULL values from CSV data
...is will do what you want. It reads the fourth field into a local variable, and then sets the actual field value to NULL, if the local variable ends up containing an empty string:
LOAD DATA INFILE '/tmp/testdata.txt'
INTO TABLE moo
FIELDS TERMINATED BY ","
LINES TERMINATED BY "\n"
(one, two, three, ...
Functions that return a function
...onfused by the d()(); at first but then realized that the first () calls d and the second () calls d's return value, which is e.
– skud
Mar 13 '14 at 18:47
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Code Wrap IntelliJ?
...doesn't have a shortcut by default, but you can assign one in the keymap.
AndroidStudio >= 1.4.1: the options are under File > Settings > Editor > General - under the Soft Wraps sub-group.
You can also right click the gutter (the vertical bar where line number is shown) and select "Use...
Is it intended by the C++ standards committee that in C++11 unordered_map destroys what it inserts?
...behaviour occurs in very recent compilers only: I found that clang 3.2-3.4 and GCC 4.8 are the only compilers to demonstrate this "feature".
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How to intercept click on link in UITextView?
...characterRange interaction:(UITextItemInteraction)interaction;
From ios7 and Later UITextView has the delegate method:
- (BOOL)textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange *NS_DEPRECATED_IOS(7_0, 10_0, "Use textView:shouldInteractWithURL:inRan...
How do I hotkey directly to File Search tab in Eclipse
... > Keys
Type "file search" in the search box. (If there are no results, and you have a really old Eclipse version, select the Include Unbound Commands check box.)
Put the caret into the Binding text box and press the key combination you want to use:
You can either re-use the CTRL+H binding (d...
How to check if a Ruby object is a Boolean
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Yes, that's called duck typing and a core principle of OOP. I think it's a feature.
– Konstantin Haase
Jun 19 '12 at 16:41
66
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Why are my basic Heroku apps taking two seconds to load?
... gets unloaded (from the server memory).
On the first hit it gets loaded and stays loaded until some time passes without anyone accessing it.
This is done to save server resources. If no one uses your app why keep resources busy and not let someone who really needs use them ?
If your app has a ...
Accessing Object Memory Address
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This is an integer (or long integer)
which is guaranteed to be unique and
constant for this object during its
lifetime. Two objects with
non-overlapping lifetimes may have the
same id() value. (Implementation note:
this is the address of the object.)
So in CPython, this will be the ...