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What is the logic behind the “using” keyword in C++?
...e
introduced by the typedef specifier. In particular, it does not define
a new type and it shall not appear in the type-id.
Bjarne Stroustrup provides a practical example:
typedef void (*PFD)(double); // C style typedef to make `PFD` a pointer to a function returning void and accepting double
us...
Add column to SQL Server
...LE... syntax.
Example
ALTER TABLE YourTable
ADD Foo INT NULL /*Adds a new int column existing rows will be
given a NULL value for the new column*/
Or
ALTER TABLE YourTable
ADD Bar INT NOT NULL DEFAULT(0) /*Adds a new int column existing rows will
...
NodeJS: Saving a base64-encoded image to disk
..."out.png", base64Data, 'base64', function(err) {
console.log(err);
});
new Buffer(..., 'base64') will convert the input string to a Buffer, which is just an array of bytes, by interpreting the input as a base64 encoded string. Then you can just write that byte array to the file.
Update
As ment...
How do I turn off PHP Notices?
... chown
47.6k1616 gold badges126126 silver badges165165 bronze badges
answered Nov 5 '11 at 14:51
Paul SalberPaul Salber
59055 si...
How to find duplicates in 2 columns not 1
...ternatives:
Group by the unique fields and delete as seen above
Create a new table, add a unique index, use INSERT IGNORE, ex:
CREATE TABLE duplicate_row_table LIKE regular_row_table;
ALTER TABLE duplicate_row_table ADD UNIQUE INDEX (id, another_id);
INSERT IGNORE INTO duplicate_row_table SELECT...
Remove all special characters except space from a string using JavaScript
... if char is a number
function isNumber (text) {
if(text) {
var reg = new RegExp('[0-9]+$');
return reg.test(text);
}
return false;
}
function removeSpecial (text) {
if(text) {
var lower = text.toLowerCase();
var upper = text.toUpperCase();
var result = "";
for(var i=...
Is a one column table good design? [closed]
...ribute that will be true for only a very few records. Instead of adding a new boolean column, I might create a separate table containing the keys of the records for which the attribute is true.
Eg. employees that have a terminal disease; banks with a 360-day year (most use 365); etc.
-Al.
...
How to set custom favicon in Express?
...adFileSync(__dirname+'/public/favicon.ico'); // read file
const favicon = new Buffer.from('AAABAAEAEBAQAAAAAAAoAQAAFgAAACgAAAAQAAAAIAAAAAEABAAAAAAAgAAAAAAAAAAAAAAAEAAAAAAAAAAAAAAA/4QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEREQ...
Sum a list of numbers in Python
..."a".
– HelloGoodbye
Aug 1 '17 at 18:51
1
Since zip stops once it reaches the end of the shorter a...
How Do I Make Glyphicons Bigger? (Change Size?)
...tstrap and font-awesome then it is easy, no need to write a single line of new code, just add fa-Nx, as big you want, See the demo
<span class="glyphicon glyphicon-globe"></span>
<span class="glyphicon glyphicon-globe fa-lg"></span>
<span class="glyphicon glyphicon-globe...