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Escape quotes in JavaScript
I'm outputting values from a database (it isn't really open to public entry, but it is open to entry by a user at the company -- meaning, I'm not worried about XSS ).
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SQLite in Android How to update a specific row
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It's actually a walk-around. The Third param of db.update() should be the where clause only, and the fourth is the actual condition values. In this case, the line should be: myDB.update(TableName, cv, "_id=?", new String[]{id}). SQLit...
Create singleton using GCD's dispatch_once in Objective-C
...er here: instancetype
+ (instancetype)sharedInstance
{
static dispatch_once_t once;
static id sharedInstance;
dispatch_once(&once, ^
{
sharedInstance = [self new];
});
return sharedInstance;
}
+ (Class*)sharedInstance
{
static dispatch_once_t once;
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Pretty print in MongoDB shell as default
...y, everything is output to a single line and it's difficult to read, especially with nested arrays and documents.
8 Answers...
Program only crashes as release build — how to debug?
I've got a "Schroedinger's Cat" type of problem here -- my program (actually the test suite for my program, but a program nonetheless) is crashing, but only when built in release mode, and only when launched from the command line. Through caveman debugging (ie, nasty printf() messages all over the ...
What's wrong with nullable columns in composite primary keys?
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Primary keys are for uniquely identifying rows. This is done by comparing all parts of a key to the input.
Per definition, NULL cannot be part of a successful comparison. Even a comparison to itself (NULL = NULL) will fail. This means a key containing NULL would not work.
Additonally, NULL is al...
Determine if string is in list in JavaScript
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You can call indexOf:
if (['a', 'b', 'c'].indexOf(str) >= 0) {
//do something
}
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AngularJS. How to call controller function from outside of controller component
How I can call function defined under controller from any place of web page (outside of controller component)?
10 Answers
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WPF: How to display an image at its original size?
... with https://msdn.microsoft.com/en-us/library/system.drawing.image.size(v=vs.110).aspx I'd guess.
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SQL - using alias in Group By
...ceptions though: MySQL and Postgres seem to have additional smartness that allows it.
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