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EF Code First foreign key without navigation property
... to this (for SQL Server):
ALTER TABLE [ChildTableName] ADD CONSTRAINT [FK_SomeName]
FOREIGN KEY ([ParentId]) REFERENCES [ParentTableName] ([Id])
CREATE INDEX [IX_SomeName] ON [ChildTableName] ([ParentId])
Alternatively, without migrations, you could just run a pure SQL command using
context.Da...
Checkout one file from Subversion
... you have Subversion 1.5+, then do a sparse checkout:
svn checkout <url_of_big_dir> <target> --depth empty
cd <target>
svn up <file_you_want>
For an older version of SVN, you might benefit from the following:
Checkout the directory using a revision back in the distant pa...
Why was the switch statement designed to need a break?
...ors
that can have either one or two
operands:
switch (operator->num_of_operands) {
case 2: process_operand( operator->operand_2);
/* FALLTHRU */
case 1: process_operand( operator->operand_1);
break;
}
Case fall through is so widely
recognized as a def...
Go Unpacking Array As Arguments
...u can use a vararg syntax similar to C:
package main
import "fmt"
func my_func( args ...int) int {
sum := 0
for _,v := range args {
sum = sum + v
}
return sum;
}
func main() {
arr := []int{2,4}
sum := my_func(arr...)
fmt.Println("Sum is ", sum)
}
Now you can sum a...
How to get all properties values of a JavaScript Object (without knowing the keys)?
...nd val
}
Object.values shim
Finally, as noted in the comments and by teh_senaus in another answer, it may be worth using one of these as a shim. Don't worry, the following does not change the prototype, it just adds a method to Object (which is much less dangerous). Using fat-arrow functions, thi...
Android: create a popup that has multiple selection options
... Toast.makeText(TopicDetails.this, "you nailed it", Toast.LENGTH_SHORT).show();
} else if ("Medium".equals(fonts[which])) {
Toast.makeText(TopicDetails.this, "you cracked it", Toast.LENGTH_SHORT).show();
} else if ("Large".equals(fonts[which])) {
...
View contents of database file in Android Studio
...; Tool Windows > Device File Explorer
Go to data > data > PACKAGE_NAME > database, where PACKAGE_NAME is the name of your package (it is com.Movie in the example above)
Right click on the database and select Save As.... Save it anywhere you want on your PC.
Now, open the SQLiteBro...
Git command to show which specific files are ignored by .gitignore
...
git ls-files -i
should work, except its source code indicates:
if (show_ignored && !exc_given) {
fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
argv[0]);
exc_given ?
It turns out it need one more parameter after the -i to actually...
SQLite - UPSERT *not* INSERT or REPLACE
...re the old value and the new value for any field.
– G__
Apr 1 '11 at 16:56
24
If the Employee is ...
Difference between TCP and UDP?
...ails (holding them in memory) for two minutes, during a state known as TIME_WAIT_2. This is a feature which defends against erroneously repeated packets from a preceding connection being interpreted as part of a current connection. Maintaining TIME_WAIT_2 uses up kernel memory on the server. DNS ...