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Difference between repository and service?
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If you grok unit testing it might be clearer to think of repositories as the minimal abstraction to minimize the mocking needed to avoid database.
– Henry Heikkinen
Apr 7 '15 at 12:12
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Why do you have to call .items() when iterating over a dictionary in Python?
...he full tuple would be more intuitive for looping, but perhaps less so for testing for membership using in.
if key in counts:
counts[key] += 1
else:
counts[key] = 1
That code wouldn't really work if you had to specify both key and value for in. I am having a hard time imagining use case w...
How to send only one UDP packet with netcat?
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OS X works this: "echo -n "test" | nc -4u -w0 localhost 9999" as SimonW says
– Simon Unsworth
Aug 28 '17 at 17:12
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Returning value from called function in a shell script
...ere's how to do each of those options:
1. Echo strings
lockdir="somedir"
testlock(){
retval=""
if mkdir "$lockdir"
then # Directory did not exist, but it was created successfully
echo >&2 "successfully acquired lock: $lockdir"
retval="true"
else
ec...
Rails: How can I set default values in ActiveRecord?
..._new callback isn't provided for this obvious use case but I've made do by confirming whether the object is already persisted indicating that it isn't new.
Having seen Brad Murray's answer this is even cleaner if the condition is moved to callback request:
after_initialize :defaults, unless: :pers...
Python: Get the first character of the first string in a list?
...tring.
If you have the following structure:
mylist = ['base', 'sample', 'test']
And want to get fist char for the first one string(item):
myList[0][0]
>>> b
If all first chars:
[x[0] for x in myList]
>>> ['b', 's', 't']
If you have a text:
text = 'base sample test'
t...
How to check if an object is a certain type
...lso use the TypeOf operator instead of the GetType method. Note that this tests if your object is compatible with the given type, not that it is the same type. That would look like this:
If TypeOf Obj Is System.Web.UI.WebControls.DropDownList Then
End If
Totally trivial, irrelevant nitpick: T...
TFS: Updating branch with changes from main
...ed, click Next
The next step has you pick a Version type. The default, Latest Version is obviously straightforward and self-explanatory: you would be brining all changes since your branch was created from the mainline down into your branch. The other choices are straightforward, but a tutorial ex...
Error: Tablespace for table xxx exists. Please DISCARD the tablespace before IMPORT
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Can confirm, the steps should be: 1. delete mysql/path/table_name.idb 2. add table_name.frm 3. DROP table_name
– Jeremy Dennen
Apr 10 '19 at 21:01
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Read user input inside a loop
...or line in $(cat filename); do
read input
echo $input;
done
Unit test:
for line in $(cat /etc/passwd); do
read input
echo $input;
echo "[$line]"
done
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