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INSERT IF NOT EXISTS ELSE UPDATE?
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INSERT OR REPLACE will replace the other fields to default value.
sqlite> CREATE TABLE Book (
ID INTEGER PRIMARY KEY AUTOINCREMENT,
Name TEXT,
TypeID INTEGER,
Level INTEGER,
Seen INTEGER
);
sqlite> INSERT INTO Book VALUES (1001, 'C++', 10, 10, 0);
sqlite> SELECT * FRO...
scopes with lambda and arguments in Rails 4 style?
...
I think it should be:
scope :find_lazy, -> (id) { where(id: id) }
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Is there an equivalent for the Zip function in Clojure Core or Contrib?
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(map vector '(1 2 3) '(4 5 6))
does what you want:
=> ([1 4] [2 5] [3 6])
Haskell needs a collection of zipWith (zipWith3, zipWith4, ...) functions, because they all need to be of a specific type; in particular, the number of input lists they accept needs to be fixed. (The...
How to create P12 certificate for iOS distribution
...ccess from Utilities
From Keychain Access toolbar select Keychain Access -> Preference
In the pop up window select Certificates tab
Set both “Online Certificate Status Protocol” and “Certificate Revocation List” to “Off"
Close this window
Now from toolbar, open Keychain Access > Cert...
php - get numeric index of associative array
... work if the associative array is mixed, for array("val1", "val2", "car" => "val3") it will produce 0, which is wrong...
– Xriuk
Feb 10 '18 at 11:12
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Django ModelForm: What is save(commit=False) used for?
...e it is the answer (from docs):
# Create a form instance with POST data.
>>> f = AuthorForm(request.POST)
# Create, but don't save the new author instance.
>>> new_author = f.save(commit=False)
The most common situation is to get the instance from form but only 'in memory', not...
Add new field to every document in a MongoDB collection
...w fields if the specified field does not exist.
Check out this example:
> db.foo.find()
> db.foo.insert({"test":"a"})
> db.foo.find()
{ "_id" : ObjectId("4e93037bbf6f1dd3a0a9541a"), "test" : "a" }
> item = db.foo.findOne()
{ "_id" : ObjectId("4e93037bbf6f1dd3a0a9541a"), "test" : "a" }
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How to deal with “java.lang.OutOfMemoryError: Java heap space” error?
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Run->Run Configurations->Click on arguments->inside VM arguments type -Xms1g -Xmx2g
– Arayan Singh
May 24 '18 at 18:38
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How to un-escape a backslash-escaped string?
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>>> print '"Hello,\\nworld!"'.decode('string_escape')
"Hello,
world!"
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Turn off spell checking in Eclipse for good
...rkspace I create:
File → Import... → General → Preferences → Next > From preference file
Related
Importing/Exporting Project Preferences
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