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Python assigning multiple variables to same value? list behavior
...n either case, you can rebind a to a different value (e.g., a = "Now I'm a string!"), but the won't affect the original value, which b and c will still be names for. The difference is that with a list, you can change the value [1, 2, 3] into [1, 2, 3, 4] by doing, e.g., a.append(4); since that's act...
Best practices for in-app database migration for Sqlite
...use prepared statements
sqlite3_exec([self database].sqliteHandle, [[NSString stringWithFormat:@"PRAGMA user_version = %d", DatabaseSchemaVersionLatest] UTF8String], NULL, NULL, NULL);
}
Here's [self database] method that lazily opens the database:
- (FMDatabase *)database {
if (!_databas...
How to best display in Terminal a MySQL SELECT returning too many fields?
...above comment, when you type SELECT * FROM sometable\G you are sending the string to the mysql command line client, not Windows, which is why the G is case sensitive
– Hurricane Hamilton
Mar 24 '14 at 15:31
...
Entity Attribute Value Database vs. strict Relational Model Ecommerce
... @Zim, that sounds pretty much like option 3. Each row has 1-n extra "generic" columns, and the data stored in them is interpreted at the application level. You get the performance benefit of having all the data for one record in one place. The metadata about those columns needs to be st...
Get list of passed arguments in Windows batch script (.bat)
...to a function %0 and also in %~0 contains the function name (or better the string that was used to call the function).
But with %~f0 you still can recall the filename.
@echo off
echo main %0, %~0, %~f0
call :myLabel+xyz
exit /b
:MYlabel
echo func %0, %~0, %~f0
exit /b
Output
main test.bat, test...
Read text file into string array (and write)
The ability to read (and write) a text file into and out of a string array is I believe a fairly common requirement. It is also quite useful when starting with a language removing the need initially to access a database. Does one exist in Golang?
e.g.
...
No serializer found for class org.hibernate.proxy.pojo.javassist.Javassist?
...
Solves the problem but json will contain two extra unneeded properties "handler":{},"hibernateLazyInitializer":{}
– prettyvoid
Mar 28 '16 at 10:48
...
What is your favorite C programming trick? [closed]
...re you can write "str[]" as the last member of a struct). you could make a string "object" like this:
struct X {
int len;
char str[1];
};
int n = strlen("hello world");
struct X *string = malloc(sizeof(struct X) + n);
strcpy(string->str, "hello world");
string->len = n;
here, we've...
JPG vs. JPEG image formats
...ut it is inaccurate. • The JPEG group were mostly Unix shops, thus the 4-char .jpeg extension, not because of Mac. • It was the DOS 8.3 limit that caused the shortening to .jpg — windows was just a shell on top of DOS. • The commonly accepted .jpg form is because of programs that had to cope...
byte[] to file in Java
...e(filePath).toPath(), data);
Where data is your byte[] and filePath is a String. You can also add multiple file open options with the StandardOpenOptions class. Add throws or surround with try/catch.
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