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Add unique constraint to combination of two columns
... UUL_USR_IDF = 137
insert into USER_UND values (137, 22, 1) --I CAN NOT => Cannot insert duplicate key row in object 'dbo.USER_UND' with unique index 'UQ_USR_UND_UUL_USR_IDF_UUL_ATUAL'. The duplicate key value is (137, 1).
insert into USER_UND values (137, 23, 0) --I CAN
insert into USER_UND val...
How to make node.js require absolute? (instead of relative)
...node and require do what it does best.
for example:
- node_modules // => these are loaded from your package.json
- app
- node_modules // => add node-style modules
- helper.js
- models
- user
- car
- package.json
- .gitignore
For example, if you're in car/index.js you can r...
CASCADE DELETE just once
...
@arthur you could probably use some version of row -> json -> text to get it done, however, I've not gone that far. Ive found through the years that a singular primary key (with potential secondary keys) is good for many reasons.
– Joe Love
...
Scala actors: receive vs react
...code
def a = 10;
while (! done) {
receive {
case msg => println("MESSAGE RECEIVED: " + msg)
}
println("after receive and printing a " + a)
}
the thread would wait in the receive call until the message is received and then would continue on and print the "after r...
Measure time in Linux - time vs clock vs getrusage vs clock_gettime vs gettimeofday vs timespec_get?
...along with the clock. For that, Android added the ANDROID_ALARM_ELAPSED_REALTIME timer that is accessible through ioctl. some information on these and other suspend related information can be found here
– Itay Bianco
Jul 11 '16 at 7:15
...
Why is “Set as Startup” option stored in the suo file and not the sln file?
...
@Oliver: Right-click Solution -> Set StartUp Projects... -> Multiple startup projects. One-click starts multiple.
– Anton
Jul 10 '13 at 21:20
...
How do I apply a perspective transform to a UIView?
...dSubview(carousel)
}
func numberOfItems(in carousel: iCarousel) -> Int {
return 10
}
func carousel(_ carousel: iCarousel, viewForItemAt index: Int, reusing view: UIView?) -> UIView {
let imageView: UIImageView
if view != nil {
imageView = ...
MySQL indexes - what are the best practices?
... Name='Eric' and Category='A'
WHERE Name='Eric' and Category='A' and Age > 18
but
WHERE Category='A' and Age > 18
would not use that index because everything has to be used from left to right.
Explain
Use Explain / Explain Extended to understand what indices are available to MySQL and...
How do I send a JSON string in a POST request in Go
...ain() {
url := "http://restapi3.apiary.io/notes"
fmt.Println("URL:>", url)
var jsonStr = []byte(`{"title":"Buy cheese and bread for breakfast."}`)
req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonStr))
req.Header.Set("X-Custom-Header", "myvalue")
req.Header.Se...
How can I use a local image as the base image with a dockerfile?
...t to Docker daemon 315.9 MB
Step 1 : FROM centos-base-image:7.3.1611
---> c4d84e86782e
Step 2 : RUN yum -y install epel-release libaio bc flex
---> Running in 36d8abd0dad9
...
In the example above FROM is fetching your local image, you can provide additional instructions to fetch an imag...