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What is the difference between declarative and imperative programming? [closed]
...eclarative programming is to invent new domain specific languages (DSL):
String Search: Regular Expression instead of custom imperative code
React.js: JSX instead of direct DOM manipulation
AWS CloudFormation: YAML instead of CLI
Relational Database: SQL instead of older read–write APIs such as ...
How To Create Table with Identity Column
...nsert into teppp ( addresss) values ('address3')
select * from teppp
null string , address1
NULL,address2
NULL,address3
If you try inserting same values as below:
insert into teppp ( name,addresss) values ('','address4')
insert into teppp ( name,addresss) values ('NULL','address5')
insert into t...
How do you set, clear, and toggle a single bit?
...t;< n);
That will clear the nth bit of number. You must invert the bit string with the bitwise NOT operator (~), then AND it.
Toggling a bit
The XOR operator (^) can be used to toggle a bit.
number ^= 1UL << n;
That will toggle the nth bit of number.
Checking a bit
You didn't ask for this...
How does __proto__ differ from constructor.prototype?
...types' __proto__ properties point to Function.prototype. Object, Function, String, Number, and Array all inherit the Function prototype.
– Swivel
Jun 26 '13 at 21:15
...
How to use ng-repeat for dictionaries in AngularJs?
... (assuming dictionary is in a variable called d):
my.component.ts:
keys: string[] = []; // declaration of class member 'keys'
// component code ...
this.keys = Object.keys(d);
my.component.html: (will display list of key:value pairs)
<ul *ngFor="let key of keys">
{{key}}: {{d[key]}...
Maximum on http header values?
...ders size exceeds that limit.
Related question: How big can a user agent string get?
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Automatically resize jQuery UI dialog to the width of the content loaded by ajax
...;li>Banana</li><li>Strawberry</li><li>long text string to see if width changes</li></ul>').dialog('open');
});
$('#three').click(function(){
//this is only call where off-centre is noticeable so use setTimeout
theDialog....
Pass Variables by Reference in Javascript
...
primitive type variables like strings and numbers are always passed by value.
Arrays and Objects are passed by reference or by value based on these conditions:
if you are setting the value of an object or array it is Pass by Value.
object1 = {prop: "ca...
What is the “Execute Around” idiom?
... throws IOException;
}
// Somewhere else
public void executeWithFile(String filename, InputStreamAction action)
throws IOException
{
InputStream stream = new FileInputStream(filename);
try {
action.useStream(stream);
} finally {
stream.close();
}
}
// Calli...
Which $_SERVER variables are safe?
...ocation, not usually a concern for web servers)
'REQUEST_METHOD' §
'QUERY_STRING'
'HTTP_ACCEPT'
'HTTP_ACCEPT_CHARSET'
'HTTP_ACCEPT_ENCODING'
'HTTP_ACCEPT_LANGUAGE'
'HTTP_CONNECTION'
'HTTP_REFERER'
'HTTP_USER_AGENT'
'AUTH_TYPE' ‖
'PHP_AUTH_DIGEST' ‖
'PHP_AUTH_USER' ‖
'PHP_AUTH_PW' ‖
'PATH_IN...