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Getting the last element of a list
...me_list[-len(some_list)], which gives you the first element.
You can also set list elements in this way. For instance:
>>> some_list = [1, 2, 3]
>>> some_list[-1] = 5 # Set the last element
>>> some_list[-2] = 3 # Set the second to last element
>>> some_list
[1,...
Why does mongoose always add an s to the end of my collection name
...el name. If you don't like this behavior, either pass a collection name or set your schemas collection name option.
Example:
var schema = new Schema({ name: String }, { collection: 'actor' });
or
schema.set('collection', 'actor');
or
var collectionName = 'actor'
var M = mongoose.model('Actor...
round up to 2 decimal places in java? [duplicate]
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BigDecimal a = new BigDecimal("123.13698");
BigDecimal roundOff = a.setScale(2, BigDecimal.ROUND_HALF_EVEN);
System.out.println(roundOff);
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Regex for numbers only
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How about a set number of numeric values? This is usually so for postal codes of certain countries like India. I guess we may have to do a string length check after this?
– Najeeb
Mar 13 '18 at 10:5...
Repository Pattern Step by Step Explanation [closed]
...make changes to your data access
You have a single place responsible for a set of tables (usually)
It is easy to replace a repository with a fake implementation for testing - so you don't need to have a database available to your unit tests
There are other benefits too, for example, if you were us...
Differences between action and actionListener
...ok before the real business action get executed, e.g. to log it, and/or to set an additional property (by <f:setPropertyActionListener>), and/or to have access to the component which invoked the action (which is available by ActionEvent argument). So, purely for preparing purposes before the r...
Check empty string in Swift?
In Objective C, one could do the following to check for strings:
14 Answers
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Generating random number between 1 and 10 in Bash Shell Script [duplicate]
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The % 10 reduces the result to a set of ranges from 0-9. However, the very top set only has a range of 0-7. Thus, there are two fewer draws for 8 & 9 than 0-7. The + 1 translates this to a bias against 9 & 10. This would be a major flaw in securi...
How to check for changes on remote (origin) Git repository?
... the tracking information between local branch and origin:
# git branch --set-upstream-to=origin/<branch> <branch>
For master branch:
git branch --set-upstream-to=origin/master master
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Automatic counter in Ruby for each?
I want to use a for-each and a counter:
8 Answers
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