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How to know/change current directory in Python shell?
...When I open the Python shell, how can I know what the current directory is and how can I change it to another directory where my modules are?
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How to add multiple files to Git at the same time
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git commit -a is shorthand for git commit --all, so yes, it will.
– dax
Jul 12 '16 at 15:15
1
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Replace a value if null or undefined in JavaScript
I have a requirement to apply the ?? C# operator to JavaScript and I don't know how.
Consider this in C#:
5 Answers
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Double Negation in C++
...l back when we had no bool type, to help avoid storing values other than 1 and 0 in boolean variables.
– Mike Seymour
Jan 17 '12 at 19:01
7
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annotation to make a private method public only for test classes [duplicate]
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The common way is to make the private method protected or package-private and to put the unit test for this method in the same package as the class under test.
Guava has a @VisibleForTesting annotation, but it's only for documentation purposes.
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Array to String PHP?
...es, string created by serialize() function of php is readable in PHP only, and you will not like to store such things in your databases specially if database is shared among applications written in different programming languages
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Recursive file search using PowerShell
...ntinue -fo -inc "filename.txt" | % { $_.fullname }
– Andrew
Nov 4 '17 at 7:34
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What makes a SQL statement sargable?
...ery row of the table. Much better to use:
WHERE myDate >= '01-01-2008' AND myDate < '01-01-2009'
Some other examples:
Bad: Select ... WHERE isNull(FullName,'Ed Jones') = 'Ed Jones'
Fixed: Select ... WHERE ((FullName = 'Ed Jones') OR (FullName IS NULL))
Bad: Select ... WHERE SUBSTRING(Deal...
What is the boundary in multipart/form-data?
...As you can see, the server knows that parameters are separated by an ampersand &. If & is required for a parameter value then it must be encoded.
So how does the server know where a parameter value starts and ends when it receives an HTTP request using multipart/form-data?
Using the bounda...
Why does the is operator return false when given null?
...e) type
One would be implicitly assuming that a type is a set of values, and that assignment compatibility of a value y with a variable of type X is nothing more nor less than checking whether y is a member of set x.
Though that is an extremely common way of looking at types, that is not the onl...