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Add primary key to existing table
...ther SQL beginner.
Reference:https://www.w3schools.com/sql/sql_primarykey.asp
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How do I prompt for Yes/No/Cancel input in a Linux shell script?
...OSIX generic solutions
You could use the read command, followed by if ... then ... else:
echo -n "Is this a good question (y/n)? "
read answer
# if echo "$answer" | grep -iq "^y" ;then
if [ "$answer" != "${answer#[Yy]}" ] ;then
echo Yes
else
echo No
fi
(Thanks to Adam Katz's comm...
.NET WebAPI Serialization k_BackingField Nastiness
...or you.
Only if you want to have more control about what's included, you then decorate your class with [DataContract] and the properties to be included with [DataMember] (because both DCS and JSON.NET respsect these attributes).
If for some reason, you need the [Serializable] on your class (i.e. ...
What is the difference between “def” and “val” to define a function
... the right-hand-side as part of the evaluation of the definition.
If x is then used subsequently, it is immediately replaced by the pre-computed value of e, so that the expression need not be evaluated again.
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How do you include additional files using VS2010 web deployment packages?
...but still no bigee if you are comfortable with MSBuild, and if you are not then read this. In order to do this we need to hook into the part of the process that collects the files for packaging. The target we need to extend is called CopyAllFilesToSingleFolder. This target has a dependency property...
Syntax behind sorted(key=lambda: …)
...yntax of lambda is the word lambda followed by the list of parameter names then a single block of code. The parameter list and code block are delineated by colon. This is similar to other constructs in python as well such as while, for, if and so on. They are all statements that typically have a cod...
How to add a new row to an empty numpy array
...r dimensionality.
>>> arr
array([], shape=(0, 3), dtype=int64)
Then be sure to append along axis 0:
arr = np.append(arr, np.array([[1,2,3]]), axis=0)
arr = np.append(arr, np.array([[4,5,6]]), axis=0)
But, @jonrsharpe is right. In fact, if you're going to be appending in a loop, it wo...
Why doesn't Dictionary have AddRange?
...row a single exception that contains all the duplicate values.
The choice then boils down to:
Throw an exception with all duplicates, leaving the original dictionary alone.
Ignore duplicates and proceed.
There are arguments for supporting both use cases. To do that, do you add a IgnoreDuplicate...
What is the proper way to re-throw an exception in C#? [duplicate]
...w an exception in some recursive XML deserialization code. If I catch and then do throw new Exception( string.Format("while deserializing the element {0}", element.Name), ex ); then if I get a crash deep in the XML parsing, the top level exception handler prints all of the InnerExceptions and i get...
Why is using 'eval' a bad practice?
....format(n1, n2))) and exits. Now you distribute this program with some OS. Then someone makes a bash script that takes some numbers from a stock site and adds them using calc. boom?
– L̲̳o̲̳̳n̲̳̳g̲̳̳p̲̳o̲̳̳k̲̳̳e̲̳̳
Jul 4 '10 at 17:23
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