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Easiest way to read from and write to files
...e excerpt:
// Create a file to write to.
string createText = "Hello and Welcome" + Environment.NewLine;
File.WriteAllText(path, createText);
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// Open the file to read from.
string readText = File.ReadAllText(path);
sha...
Is there a version control system for database structure changes?
... a table keeps track of your current db version.
To migrate up, you run a command called "db:migrate" which looks at your version and applies the needed scripts. You can migrate down in a similar way.
The migration scripts themselves are kept in a version control system -- whenever you change the ...
How do I escape a single quote in SQL Server?
... If you're using an ORM it will do it for you. If you're building your SQL commands manually you'll want to use the language's "prepared statements" functionality. If you're doing it in Management Studio then you'll have to do the replace.
– Cᴏʀʏ
Feb 15 '14...
Max return value if empty query
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int maxShoeSize = Workers.Where(x => x.CompanyId == 8)
.Select(x => x.ShoeSize)
.DefaultIfEmpty(0)
.Max();
The zero in DefaultIfEmpty is not necessary.
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Error: “dictionary update sequence element #0 has length 1; 2 is required” on Django 1.4
... well that's half an hour spent unproductively that would never come back. tnx.
– Iman Akbari
Aug 5 '16 at 20:00
2
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How do I get the path of the assembly the code is in?
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Convert a Python list with strings all to lowercase or uppercase
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It can be done with list comprehensions. These basically take the form of [function-of-item for item in some-list]. For example, to create a new list where all the items are lower-cased (or upper-cased in the second snippet), you would use:
>>...
Assign output of os.system to a variable and prevent it from being displayed on the screen [duplicat
I want to assign the output of a command I run using os.system to a variable and prevent it from being output to the screen. But, in the below code ,the output is sent to the screen and the value printed for var is 0, which I guess signifies whether the command ran successfully or not. Is there ...
How can I define colors as variables in CSS?
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Most efficient way to prepend a value to an array
....slice().unshift(0); // Use "slice" to avoid mutating "a".
[Edit 2]
For completeness, the following function can be used instead of OP's example prependArray(...) to take advantage of the Array unshift(...) method:
function prepend(value, array) {
var newArray = array.slice();
newArray.unshi...