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How can I limit possible inputs in a HTML5 “number” element?
.../>
if you add both a max and a min value you can specify the range of allowed values:
<input type="number" min="1" max="999" />
The above will still not stop a user from manually entering a value outside of the specified range. Instead he will be displayed a popup telling him to enter ...
How do I share IntelliJ Run/Debug configurations between projects?
... with others.
You could copy this file and put it in the same location in all your idea projects.
However, in the future, you might want to consider using source control branches for app versions rather than separate projects. IntelliJ handles these very well.
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Creating threads - Task.Factory.StartNew vs new Thread()
I am just learning about the new Threading and Parallel libraries in .Net 4
4 Answers
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What is the equivalent of the C# 'var' keyword in Java?
...to give a proper type to myData. 6 years ago, this was impossible in Java (all Types had names, even if they were extremely verbose and unweildy). I do not know if this has changed in the mean time.
var is not the same as dynamic. variables are still 100% statically typed. This will not compile:
va...
SQLiteDatabase.query method
...
tableColumns
null for all columns as in SELECT * FROM ...
new String[] { "column1", "column2", ... } for specific columns as in SELECT column1, column2 FROM ... - you can also put complex expressions here:
new String[] { "(SELECT max(column1) FROM...
What is CMake equivalent of 'configure --prefix=DIR && make all install '?
I do cmake . && make all install . This works, but installs to /usr/local .
7 Answers
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JavaScript isset() equivalent
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I generally use the typeof operator:
if (typeof obj.foo !== 'undefined') {
// your code here
}
It will return "undefined" either if the property doesn't exist or its value is undefined.
(See also: Difference between undefi...
Echo tab characters in bash script
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That's because echo -e is not POSIX and make calls /bin/sh which is normally not the program use use interactively, and normally hasn't -e implemented. For portability, use printf '\t' instead.
– Jo So
Oct 5 '12 at 19:02
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Difference between class and type
...able of reference type always holds the value of a reference to an object. All objects, including arrays, support the methods of class Object. The reference types are class types (including enum types), interface types, and array types.
Every piece of data has a type which defines its structure, ...
String to object in JS
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Actually, the best solution is using JSON:
Documentation
JSON.parse(text[, reviver]);
Examples:
1)
var myobj = JSON.parse('{ "hello":"world" }');
alert(myobj.hello); // 'world'
2)
var myobj = JSON.parse(JSON.stringify({
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