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Difference between applicationContext.xml and spring-servlet.xml in Spring Framework
...antiation order is: the root (application context), then FrameworkServlet.
Now it should be clear why they are important in which scenario.
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foll...
MongoDB not equal to
...8b1a7768972d396fe2268"), "author" : "you", "post" : "how to query" }
And now $not, which takes in predicate ($ne) and negates it ($not):
db.test.find({'post': {$not: {$ne : ""}}})
{ "_id" : ObjectId("4f68b19c768972d396fe2267"), "author" : "me", "post" : "" }
...
Node.js project naming conventions for files & folders
...ion not for directory structures. When we get to this topic, we expect to know if files are better named with dashes, underscores or camelCase. I will upvote, if this is added to this answer.
– Tronix117
Aug 4 '14 at 14:51
...
Create a custom event in Java
...ic void sayHello() {
System.out.println("Hello!!");
// Notify everybody that may be interested.
for (HelloListener hl : listeners)
hl.someoneSaidHello();
}
}
// Someone interested in "Hello" events
class Responder implements HelloListener {
@Override
...
How do I filter ForeignKey choices in a Django ModelForm?
...et to the field's queryset attribute. Depends on how your form is built. If you build an explicit form, you'll have fields named directly.
form.rate.queryset = Rate.objects.filter(company_id=the_company.id)
If you take the default ModelForm object, form.fields["rate"].queryset = ...
This is d...
Lazy Method for Reading Big File in Python?
...1k."""
while True:
data = file_object.read(chunk_size)
if not data:
break
yield data
with open('really_big_file.dat') as f:
for piece in read_in_chunks(f):
process_data(piece)
Another option would be to use iter and a helper function:
f = op...
When should the volatile keyword be used in C#?
...ode still in production environments and the devs that maintain it should know why that keyword is there and if its safe to remove.
– Paul Easter
Jan 1 '15 at 22:43
3
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How to insert a SQLite record with a datetime set to 'now' in Android application?
...a couple options you can use:
You could try using the string "(DATETIME('now'))" instead.
Insert the datetime yourself, ie with System.currentTimeMillis()
When creating the SQLite table, specify a default value for the created_date column as the current date time.
Use SQLiteDatabase.execSQL to ins...
Are nested try/except blocks in python a good programming practice?
...
In summary the only problem would be your code getting too much indented. If you feel like it, try to simplify some of the nestings like lqc suggested in the suggested answer above.
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Split array into chunks
...onsole.log(
[1, 2, 3, 4, 5, 6, 7].chunk(3)
)
My preferred way nowadays is the above, or one of the following:
Array.range = function(n) {
// Array.range(5) --> [0,1,2,3,4]
return Array.apply(null,Array(n)).map((x,i) => i)
};
Object.defineProperty(Array.prototype, 'chunk', {
...