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How do I execute inserts and updates in an Alembic upgrade script?
...ms.
Note that Alembic provides some basic data functions: op.bulk_insert() and op.execute(). If the operations are fairly minimal, use those. If the migration requires relationships or other complex interactions, I prefer to use the full power of models and sessions as described below.
The followi...
make: Nothing to be done for `all'
...imes "Nothing to be done for all" error can be caused by spaces before command in makefile rule instead of tab. Please ensure that you use tabs instead of spaces inside of your rules.
all:
<\t>$(CC) $(CFLAGS) ...
instead of
all:
$(CC) $(CFLAGS) ...
Please see the GNU make manual for ...
In C#, how do I calculate someone's age based on a DateTime type birthday?
...
An easy to understand and simple solution.
// Save today's date.
var today = DateTime.Today;
// Calculate the age.
var age = today.Year - birthdate.Year;
// Go back to the year in which the person was born in case of a leap year
if (birthdat...
Non-Singleton Services in AngularJS
...eturn a newable function as this begins to break down dependency injection and the library will behave awkwardly, especially for third parties. In short, I am not sure there are any legitimate use cases for non-singleton sevices.
A better way to accomplish the same thing is to use the factory as an...
Is there a RegExp.escape function in Javascript?
...he function linked above is insufficient. It fails to escape ^ or $ (start and end of string), or -, which in a character group is used for ranges.
Use this function:
function escapeRegex(string) {
return string.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
}
While it may seem unnecessary a...
What's the recommended way to extend AngularJS controllers?
...at are quite similar. I want to have a controller which these three extend and share its functions.
12 Answers
...
How can I unstage my files again after making a local commit?
I have executed the following command
7 Answers
7
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Why does appending “” to a String save memory?
...owing:
data.substring(x, y) + ""
creates a new (smaller) String object, and throws away the reference to the String created by substring(), thus enabling garbage collection of this.
The important thing to realise is that substring() gives a window onto an existing String - or rather, the charac...
Copy object values in Visual Studio debug mode
...tudio debug mode it's possible to hover over variables to show their value and then right-click to "Copy", "Copy Expression" or "Copy Value".
...
How to disable HTML button using JavaScript?
...attributes are defined as boolean, which means you can specify their value and leave everything else out. i.e. Instead of disabled="disabled", you include only the bold part. In HTML 4, you should include only the bold part as the full version is marked as a feature with limited support (although th...