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Java null check why use == instead of .equals()
...r two distinct object instances to be "equal" according to their contract. And then there's the minor detail that since equals is a method, if you try to invoke it on a null reference, you'll get a NullPointerException.
For instance:
class Foo {
private int data;
Foo(int d) {
this...
Replacing a char at a given index in string? [duplicate]
String does not have ReplaceAt() , and I'm tumbling a bit on how to make a decent function that does what I need. I suppose the CPU cost is high, but the string sizes are small so it's all ok
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Remove file from the repository but keep it locally
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And then add the path to .gitignore so git doesn't try to make you add it later.
– grossvogel
Aug 12 '10 at 16:24
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Find all files with a filename beginning with a specified string?
I have a directory with roughly 100000 files in it, and I want to perform some function on all files beginning with a specified string, which may match tens of thousands of files.
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Mongo: find items that don't have a certain field
... answered Apr 19 '11 at 16:19
Andrew OrsichAndrew Orsich
47.9k1414 gold badges129129 silver badges130130 bronze badges
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How to skip “are you sure Y/N” when deleting files in batch files
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Use del /F /Q to force deletion of read-only files (/F) and directories and not ask to confirm (/Q) when deleting via wildcard.
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List All Redis Databases
I ran this command to access my redis server.
3 Answers
3
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Using GSON to parse a JSON array
..."
}, {
"number": "2",
"title": "hello_world"
}
]
and
Wrapper[] data = gson.fromJson(jElement, Wrapper[].class);
should work fine.
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Search an Oracle database for tables with specific column names?
...swered Dec 23 '09 at 15:06
Tony AndrewsTony Andrews
119k1919 gold badges207207 silver badges246246 bronze badges
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MySQL ON DUPLICATE KEY UPDATE for multiple rows insert in single query
...nd this is to first declare a temp table, insert value to that temp table, and then use MERGE
Like this:
declare @Source table
(
name varchar(30),
age decimal(23,0)
)
insert into @Source VALUES
('Helen', 24),
('Katrina', 21),
('Samia', 22),
('Hui Ling', 25),
('Yumie', 29);
MERGE beautiful AS T...