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Write string to text file and ensure it always overwrites the existing content.
...that I want to write to a file and always overwrite the existing content. If the file isn't there, the program should create a new file instead of throwing an exception.
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What's better to use in PHP, $array[] = $value or array_push($array, $value)?
...8 // array[]
This shouldn't be surprising, as the PHP manual notes this:
If you use array_push() to add one element to the array it's better to use $array[] = because in that way there is no overhead of calling a function.
The way it is phrased I wouldn't be surprised if array_push is more effic...
View array in Visual Studio debugger? [duplicate]
...ements 0-(N-1) where N is the number you add after the comma.
For example if pArray is the array, type pArray,10 in the watch window.
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Appropriate datatype for holding percent values?
..., the data type you use depends on how you plan to store your percentages. If you are going to store their fractional equivalent (e.g. 100.00% stored as 1.0000), I would store the data in a decimal(5,4) data type with a CHECK constraint that ensures that the values never exceed 1.0000 (assuming that...
Selecting empty text input using jQuery
How do I identify empty textboxes using jQuery? I would like to do it using selectors if it is at all possible. Also, I must select on id since in the real code where I want to use this I don't want to select all text inputs.
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SQL Server add auto increment primary key to existing table
...TABLE dbo.YourTable
ADD CONSTRAINT PK_YourTable
PRIMARY KEY(ID)
or if you prefer to do all in one step:
ALTER TABLE dbo.YourTable
ADD ID INT IDENTITY
CONSTRAINT PK_YourTable PRIMARY KEY CLUSTERED
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setting an environment variable in virtualenv
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Very funny gif :D
– chachan
Nov 4 '14 at 22:47
3
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How to revert initial git commit?
...tial commit, but keeps all previously commited changes added to the index. If you want to also remove those changes, just execute a following git reset --hard. Even if incomplete, this answer is indeed the best one, so avoid using rm -fr .git (unless you know what you are doing).
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MySQL: Can't create table (errno: 150)
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From the MySQL - FOREIGN KEY Constraints Documentation:
If you re-create a table that was dropped, it must have a definition that conforms to the foreign key constraints referencing it. It must have the correct column names and types, and it must have indexes on the referenced key...
What is the difference between sites-enabled and sites-available directory?
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The difference is that virtual sites listed in the sites-enabled directory are served by apache. In the sites-available directory there are the virtual sites that exist on your server but people can't access them because they are ...