Questions tagged [declare]
Use this tag for questions related to declare, which is usually meant for declaring variables, statements, etc.
748
questions
251
votes
6
answers
569k
views
How to declare an ArrayList with values? [duplicate]
ArrayList or List declaration in Java has questioned and answered how to declare an empty ArrayList but how do I declare an ArrayList with values?
I've tried the following but it returns a syntax ...
- 119k
137
votes
2
answers
218k
views
Declare variable in table valued function
How can I declare a variable in a table valued function?
- 4,077
136
votes
10
answers
495k
views
How do I use variables in Oracle SQL Developer?
Below is an example of using variables in SQL Server 2000.
DECLARE @EmpIDVar INT
SET @EmpIDVar = 1234
SELECT *
FROM Employees
WHERE EmployeeID = @EmpIDVar
I want to do the exact same thing in ...
- 1,361
111
votes
11
answers
406k
views
SELECT INTO Variable in MySQL DECLARE causes syntax error?
I´d like to SELECT a single value into a variable. I´d tried to following:
DECLARE myvar INT(4);
-- immediately returns some syntax error.
SELECT myvalue
FROM mytable
WHERE anothervalue = 1;
-...
- 28k
103
votes
15
answers
472k
views
Declaring array of objects
I have a variable which is an array and I want every element of the array to act as an object by default. To achieve this, I can do something like this in my code.
var sample = new Array();
sample[0] ...
- 4,990
78
votes
2
answers
162k
views
Declare local variables in PostgreSQL?
There is an almost identical, but not really answered question here.
I am migrating an application from MS SQL Server to PostgreSQL. In many places in code I use local variables so I would like to go ...
- 15.1k
71
votes
4
answers
59k
views
C function pointer syntax
Normally, when declaring some variable, you put its type before it, like:
int a;
a function pointer may have type like: int(*)(int,int), in case we point to a function that takes two integers and ...
- 831
68
votes
2
answers
145k
views
typescript declare third party modules
How could I declare a third party module which looks like this:
in third party module:
module.exports = function foo(){
// do somthing
}
in my code:
import * as foo from 'foo-module'; // Can not ...
- 4,602
63
votes
3
answers
30k
views
Differences between declare, typeset and local variable in Bash
When typing variables in Bash, what is the difference between declare and typeset? When used inside a function: what is the difference between declare and typeset and local?
The only difference I ...
- 10.9k
54
votes
2
answers
18k
views
What does "#!/bin/env" mean (at the top of a node.js script)?
I found serval node.js projects that have this at top of their app.js (as in this openshift program):
#!/bin/env node
What does this mean? How does this work? Where is it useful?
- 15.2k
46
votes
8
answers
101k
views
name 'times' is used prior to global declaration - But IT IS declared
I'm coding a small program to time and show, in a ordered fashion, my Rubik's cube solvings. But Python (3) keeps bothering me about times being used prior to global declaration. But what's strange is ...
- 483
44
votes
6
answers
49k
views
Declare multiple variables in JavaScript
I want to declare multiple variables in a function:
function foo() {
var src_arr = new Array();
var caption_arr = new Array();
var fav_arr = new Array();
var hidden_arr = new ...
- 11.2k
40
votes
10
answers
37k
views
Why use constants in programming? [closed]
I've just been going back over a bit of C studying using Ivor Horton's Beginning C book. I got to the bit about declaring constants which seems to get mixed up with variables in the same sentence.
...
- 409
32
votes
4
answers
173k
views
Create View - Declare a variable
I am creating a view that is using that STUFF function. I want to put the result of STUFF in a variable for my view. The problem I am having is declaring my variable. It gives me the message "...
- 965
32
votes
5
answers
50k
views
MySQL local variables
I am trying to define and initialize a MySQL variable for a query.
I have the following:
DECLARE @countTotal INT;
SET @countTotal = SELECT COUNT(*) FROM nGrams;
I am using MySQL in Netbeans and it ...
- 15.8k
32
votes
2
answers
8k
views
Can I declare the same variable twice in different for loops in JavaScript? [duplicate]
Possible Duplicate:
JavaScript Variable Scope
I have a JavaScript function for HTML select options for days:
// Show and hide days according to the selected year and month.
function ...
- 3,072
31
votes
2
answers
14k
views
PHP using Declare ? What is a tick?
I am a little bit confused by the PHP function declare.
What exactly is a single tick? I thought a tick equals one line of code?
But if I use:
function myfunc() {
print "Tick";
}
...
- 20.5k
30
votes
3
answers
2k
views
Why don't methods of structs have to be declared in C++?
Take, for example, the following code:
#include <iostream>
#include <string>
int main()
{
print("Hello!");
}
void print(std::string s) {
std::cout << s << std::endl;
...
user3835277
27
votes
2
answers
92k
views
Declare variable set = select
How do I declare a variable for used in a PostgreSQL 9.3 query?
CREATE or replace FUNCTION public.test()
returns int4
AS
$BODY$
DECLARE
cod_process bigint :=30001;
cod_instance bigint ;
...
- 311
27
votes
1
answer
36k
views
Declare row type variable in PL/pgSQL
As I found SELECT * FROM t INTO my_data; works only if:
DO $$
DECLARE
my_data t%ROWTYPE;
BEGIN
SELECT * FROM t INTO my_data WHERE id = ?;
END $$;
Am I right?
If I want to get only 2-3 columns ...
- 26.9k
25
votes
3
answers
54k
views
TypeScript define object structure for later use
Is it possible to define an object structure in TypeScript that can be used then as parameter type?
What I mean:
I have (let's say) 5 functions that return the same object structure like so:
foo(): {...
- 473
24
votes
4
answers
64k
views
Cannot assign a default value to a local variable in SQL
I am trying to declare local variable like:
DECLARE @thresholdDate DATETIME = '2014-11-30'
And I am getting error:
Cannot assign a default value to a local variable.
As per documentation:
...
- 8,411
23
votes
4
answers
23k
views
Avoiding declaring private functions in class header files (C++)
(In C++) I have a class whose structure is declared in a header file. That header file is included in lots of source files, such that when I edit it I need to recompile lots of files.
The class has a ...
- 2,053
22
votes
3
answers
15k
views
Why are "declare -f" and "declare -a" needed in bash scripts?
Sorry for the innocent question - I'm just trying to understand...
For example - I have:
$ cat test.sh
#!/bin/bash
declare -f testfunct
testfunct () {
echo "I'm function"
}
testfunct
...
- 4,504
22
votes
1
answer
12k
views
TypeScript - Declare vs Export - Best Practices?
Short and sweet, is it better practice to define my own interfaces with declare or with export?
// i.something.d.ts
export default interface ISomething {
myValue: string;
}
// something.ts
...
user358089
21
votes
2
answers
51k
views
Create a function declaring a predefined text array
I need to create a function in Postgres and one of the variables I declare is a predefined text array, but I don't know the syntax to set its values. This is what I have so far:
CREATE OR REPLACE ...
- 3,113
20
votes
3
answers
34k
views
Declare variable syntax invalid in MySQL Workbench?
I am trying to create and set a variable:
DECLARE myId INT;
SET myId = 5;
However, I am getting invalid syntax complaint in MySQL Workbench:
SQL syntax error near 'DECLARE myId INT;'
I have ...
- 10.4k
18
votes
2
answers
16k
views
Difference between DECLARE and SET in SQL [closed]
What's the difference between DECLARE and SET using SQL (or more specifically MySQL)?
Both can set variables it seems. I have read the MySQL docs and I did not understand the difference between the ...
- 185
17
votes
4
answers
30k
views
DllImport vs Declare in VB.NET
I notice in the MSDN documentation that there are multiple ways to declare a reference to a function in an external DLL from within a VB.NET program.
The confusing thing is that MSDN claims that ...
- 4,582
16
votes
8
answers
9k
views
What exactly are C++ definitions, declarations and assignments?
I tend to use the words define, declare and assign interchangeably but this seems to cause offense to some people. Is this justified? Should I only use the word declare for the first time I assign to ...
in bruges
16
votes
3
answers
7k
views
Forward declare a struct in Objective-C
I'm creating a protocol, and one of the parameters to a method I'm defining is a CMTime*. I would like to forward declare CMTime as opposed to including it. However, I've tried @class CMTime and it ...
- 161
15
votes
2
answers
2k
views
How to read/write memory on Mac OS X with VBA?
On Windows the declared function RtlMoveMemory provides a way to copy a block of bytes from one address to another:
Private Declare PtrSafe Sub RtlMoveMemory Lib "kernel32" ( _
...
- 949
14
votes
3
answers
32k
views
C# Declare a string that spans on multiple lines
I'm trying to create a string that is something like this
string myStr = "CREATE TABLE myTable
(
id text,
name text
)";
But I get an error:
https://i.stack.imgur.com/o6MJK.png
What is going on ...
- 5,727
14
votes
1
answer
2k
views
Is there ever a reason to use the declare keyword in front of types and interfaces?
I have come across some code like this:
declare type A = { ... };
declare interface B { ... }
From searching for the declare keyword (and none of the hits pointed to me the TypeScript docs for some ...
- 9,918
13
votes
6
answers
122k
views
creating array without declaring the size - java
i've digging around about the same issue but i couldn't find the same as i had
i want to create an array without declaring the size because i don't know how it will be !
to clear the issue i'd like ...
- 1,498
11
votes
1
answer
73k
views
How to declare session variable in C#? [duplicate]
I want to make a new session, where whatever is typed in a textbox is saved in that session. Then on another aspx page, I would like to display that session in a label.
I'm just unsure on how to ...
- 137
9
votes
4
answers
7k
views
Missing partial modifier on declaration of type 'x' - cause by auto-generated code by designer
The full error description is as per below:
And I found a few similar question posted before: A and B
But the question in A and B does not provide detail of problem description (perhaps we prompted ...
- 3,801
8
votes
4
answers
345
views
why a[n] is accepted in c during runtime?
why can we do this in c?
int n;
scanf("%d",&n);
int a[n];
I thought array is located memory during load time but seems like the above example works during runtime.
Do I misunderstand any thing? ...
user188276
8
votes
2
answers
46k
views
Declare a variable in Oracle SQL to use in a query
Hi I am trying to declare a variable to use in Oracle SQL select query as such:
DECLARE
myDate DATE;
BEGIN
SELECT Source as "Source", DT as "Date", Status as "Status", COALESCE("Count", 0) as "...
- 5,442
7
votes
5
answers
18k
views
How is this private variable "not declared in this scope"?
I'm currently trying to learn more about object oriented design in C++ (familiar with Java) and am running into some walls. The project I am trying to put together to learn these principles in a game ...
- 2,735
7
votes
1
answer
13k
views
Declare Variable Not In Function by postgres
I want to declare variable in postgres but not in function...
Declare
c varchar;
a integer;
b integer;
select b = count (*) from table
set a = 1
while a <= b
begin
...
- 101
7
votes
2
answers
23k
views
character encoding of a framed document was not declared
I get this warning in FF when developing a site of mine. I can't find any real info about it and how to fix this.
the character encoding of a framed document was not declared. The document may appear ...
- 6,967
7
votes
2
answers
20k
views
how can i declare variables via macros?
first of all, I'm using MS's Visual Studio and using C language.
Recently I need to declare variables with just one same statement which likes a macro.
However as you know, I can declare just one ...
- 91
7
votes
4
answers
5k
views
How to assign char array in struct inline?
I'm trying to do something like this:
struct SomeStruct {
const char *bytes;
const char *desc;
};
SomeStruct example = { { 0x10, 0x11, 0x12, 0x13 }, "10-13" };
Why isn't this working?
- 3,977
7
votes
1
answer
17k
views
JavaScript: Can I declare variables inside switch cases? [duplicate]
In C language, you cannot declare any variables inside 'case' statements.
switch ( i ){
case 1:
int a = 1; //error!
break;
}
However, you can when you use with curly parentheses.
switch ( i ){
...
- 83
7
votes
4
answers
23k
views
Cant declare variable SQL
I've been trying to declare an integer variable but its just not working. Here is my query:
DECLARE @count INT
SET @count = 5633
SELECT count(matchid)
FROM `matches`
WHERE id = @count
Im ...
7
votes
2
answers
120k
views
Python: Declare as integer and character
# declare score as integer
score = int
# declare rating as character
rating = chr
# write "Enter score: "
# input score
score = input("Enter score: ")
# if score == 10 Then
# set rating = "A"
# ...
- 91
7
votes
3
answers
93k
views
Declaring SQL variables - SQL Server
Can anyone check on my statement...
DECLARE @tblName varchar(MAX),
@strSQL varchar(MAX)
SET @tblName ='SELECT DISTINCT o.name as TableName
FROM sysobjects o
...
- 275
7
votes
2
answers
1k
views
Clojure: resolve declares symbol
I get some weird behaviour when checking if a symbol can be resolved.
user=> ok
CompilerException java.lang.RuntimeException: Unable to resolve symbol: ok in this context, compiling:(...
- 1,469
7
votes
2
answers
2k
views
Kotlin declare nested array
How can nested lists be declared in Kotlin?
I'm looking for something in the form of:
var nestedList:List = [1,[2,[3,null,4]],[null],5]
so that I can flatten it later on (result should be nestedList ...
- 137