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What does “while True” mean in Python?
...s the same as saying while(true)
Anything that is not FALSE, 0, an emptry string "", null, or undefined is likely to be evaluated to true.
When I first started programming I used to do things like if(foo == true), I didn't realise that was virtually the same thing as if(foo).
So when you say whi...
Deleting array elements in JavaScript - delete vs splice
... +1 For Array.remove(). However it's not happy being passed string arguments (unlike most Array methods, eg [1,2,3].slice('1'); // =[2,3]), so it's safer to change it to var rest = this.slice(parseInt(to || from) + 1 || this.length);
– Richard Inglis
...
Sending websocket ping/pong frame from browser
... Or is it just a design pattern (e.g. I literally send "ping" or any other string to the server and have it respond). Is ping-pong at all related to continuation frames?
...
convert UIImage to NSData
... UIImage *snapshot = self.myImageView.image;
[self encodeImageToBase64String:snapshot];
}
call this method for image convert in base 64
-(NSString *)encodeImageToBase64String:(UIImage *)image
{
return [UIImagePNGRepresentation(image) base64EncodedStringWithOptions:NSDataB...
Webstorm: “Cannot Resolve Directory”
...et feature in it's HTML parser that will attempt to resolve directories in strings that are supposed to reference a file in your project. For example:
...
Understanding the transclude option of directive definition?
...imes it's desirable to be able to pass in an entire template rather than a string or an object. Let's say that we want to create a "dialog box" component. The dialog box should be able to wrap any arbitrary content.
To do this, we need to use the transclude option. Refer to the example below.
sc...
What is the difference between Hibernate and Spring Data JPA
...lows you to declare interfaces that have methods like findByNameOrderByAge(String name); that will be parsed in runtime and converted into appropriate JPA queries.
Its placement atop of JPA makes its use tempting for:
Rookie developers who don't know SQL or know it badly. This is a
recipe for dis...
Creating .pem file for APNS?
...com and "iPhone Advanced Projects" chapter 10 byJoe Pezzillo.
With the aps_developer_identity.cer in the keychain:
Launch Keychain Access from your local Mac and from the login keychain, filter by the Certificates category. You will see an expandable option called “Apple Development Push Servic...
Creating Multifield Indexes in Mongoose / MongoDB
...ommand can be used to create compound index for nested json:
db.ACCOUNT_collection.createIndex({"account.id":1,"account.customerId":1},{unique:1})
Mongo json structure is like :
{"_id":"648738"
"account": {
"id": "123",
"customerId": 7879,
"name": "test"
..
..
}
}
I hav...
How can I combine multiple rows into a comma-delimited list in Oracle? [duplicate]
...e (most likely 4000 bytes) otherwise you will run into ORA-01489 result of string concatenation is too long.
– JanM
Jun 21 '17 at 9:37
...