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How to take screenshot of a div with JavaScript?
I am building something called the "HTML Quiz". It's completely ran on JavaScript and it's pretty cool.
10 Answers
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SQL SELECT WHERE field contains words
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+ 1 I agree it's slower but it can be mitigated with good indexing
– Preet Sangha
Jan 12 '13 at 6:22
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ObservableCollection Doesn't support AddRange method, so I get notified for each item added, besides
... OnCollectionChanging(ce)
If ce.Cancel Then Exit Sub
Dim index = Items.Count - 1
For Each i In collection
Items.Add(i)
Next
OnCollectionChanged(New NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, collection, index))
End S...
One-liner to recursively list directories in Ruby?
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Dir.glob("**/*/") # for directories
Dir.glob("**/*") # for all files
Instead of Dir.glob(foo) you can also write Dir[foo] (however Dir.glob can also take a block, in which case it will yield each path instead of creating an array).
Ruby Glob Docs
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Primary key or Unique index?
At work we have a big database with unique indexes instead of primary keys and all works fine.
15 Answers
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Evil Mode best practice? [closed]
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all this is great, I added some in wikemacs: wikemacs.org/index.php/Evil#Configuration
– Ehvince
Aug 8 '13 at 9:16
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Is there a foreach loop in Go?
...g iteration
variables and then executes the block.
As an example:
for index, element := range someSlice {
// index is the index where we are
// element is the element from someSlice for where we are
}
If you don't care about the index, you can use _:
for _, element := range someSlice...
How can I remove an element from a list, with lodash?
...ly what I was looking for. Removing an element is trivial if you know the index, but what about when you don't know the index?
– random_user_name
Jan 19 '16 at 23:30
3
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How can I read a function's signature including default argument values?
...c', 'has_default default_value')
def _get_default_arg(args, defaults, arg_index):
""" Method that determines if an argument has default value or not,
and if yes what is the default value for the argument
:param args: array of arguments, eg: ['first_arg', 'second_arg', 'third_arg']
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How are Python's Built In Dictionaries Implemented?
...us block of memory (sort of like an array, so you can do an O(1) lookup by index).
Each slot in the table can store one and only one entry. This is important.
Each entry in the table is actually a combination of the three values: < hash, key, value >. This is implemented as a C struct (see d...