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SQLite add Primary Key
...n't help you. Modify this first to your needs
Also please don't forget to read the comments in the code .
The Code
Use this as a method in your class to check 1st whether the column you want to add is missing . We do this just to not repeat the process of altering the table receipt_barcode.
Just...
Java - escape string to prevent SQL injection
...ore, but working with PreparedStatements is also much easier and much more readable. That alone probably makes them the default for every programmer who knows about them.
– Edan Maor
Nov 28 '09 at 18:54
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Why prefer two's complement over sign-and-magnitude for signed numbers?
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Nothing changes when writes or reads. Only applicable when addition or subtraction.
– Talespin_Kit
Jan 15 '17 at 18:47
add a commen...
py2exe - generate single executable file
... excludes=['_ssl', # Exclude _ssl
'pyreadline', 'difflib', 'doctest', 'locale',
'optparse', 'pickle', 'calendar', 'pbd', 'unittest', 'inspect'], # Exclude standard library
dll_excludes=['msvcr71.dll', 'w9x...
How do I remove the passphrase for the SSH key without having to create a new key?
...nerated id to a remote machine and add it to the remote keychain.
You can read more here and here.
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Default string initialization: NULL or Empty? [closed]
...tabase data types work. (Edit: This statement was very unclear. It should read "I use empty string for default initialization when NULL is a superfluous state, much in the same way I set up a database column as NOT NULL if NULL would be a superfluous state. Similarly, many of my DB columns are set...
Why does the 260 character path length limit exist in Windows?
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I read that making this change could cause compatibility issues with older 32-bit applications, but is this type of problem with compatibility common? I'd like to make the change myself. lifehacker.com/…
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Is there a way to detect if a browser window is not currently active?
...wser support:
Chrome 13+
Internet Explorer 10+
Firefox 10+
Opera 12.10+ [read notes]
The following code falls back to the less reliable blur/focus method in incompatible browsers:
(function() {
var hidden = "hidden";
// Standards:
if (hidden in document)
document.addEventListener("vi...
Find XOR of all numbers in a given range
... last year in university. Fun days. What came to my mind immediately after reading this is this XKCD comic.
– Sean Francis N. Ballais
Jan 18 '17 at 13:40
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PHP + curl, HTTP POST sample code?
...o www.google.com and sent it some data.
Had the server been programmed to read in the post variables, it could decide to do something different based upon that.
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