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Check if character is number?
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You could use comparison operators to see if it is in the range of digit characters:
var c = justPrices[i].substr(commapos+2,1);
if (c >= '0' && c <= '9') {
// it is a number
} else {
// it isn't
}
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How to move the cursor word by word in the OS X Terminal
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Out of the box you can use the quite bizarre Esc+F to move to the beginning of the next word and Esc+B to move to the beginning of the current word.
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How to evaluate a math expression given in string form?
I'm trying to write a Java routine to evaluate math expressions from String values like:
25 Answers
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How do I implement an Objective-C singleton that is compatible with ARC?
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In exactly the same way that you (should) have been doing it already:
+ (instancetype)sharedInstance
{
static MyClass *sharedInstance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
sharedInstance = [[MyClass alloc] init];
// Do...
Combining CSS Pseudo-elements, “:after” the “:last-child”
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This works :) (I hope multi-browser, Firefox likes it)
li { display: inline; list-style-type: none; }
li:after { content: ", "; }
li:last-child:before { content: "and "; }
li:last-child:after { content: "."; }
<html>
<body>
<ul>
<l...
What is a wrapper class?
...a wrapper class is any class which "wraps" or "encapsulates" the functionality of another class or component. These are useful by providing a level of abstraction from the implementation of the underlying class or component; for example, wrapper classes that wrap COM components can manage the proce...
What is the recommended way to delete a large number of items from DynamoDB?
I'm writing a simple logging service in DynamoDB.
6 Answers
6
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How can I use grep to find a word inside a folder?
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edited May 13 '16 at 20:30
SeldomNeedy
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a...
How to count total number of watches on a page?
...);
};
f(root);
// Remove duplicate watchers
var watchersWithoutDuplicates = [];
angular.forEach(watchers, function(item) {
if(watchersWithoutDuplicates.indexOf(item) < 0) {
watchersWithoutDuplicates.push(item);
}
});
console.log(watchers...
Convert string to Python class object?
... as user input to a Python function, I'd like to get a class object out of it if there's a class with that name in the currently defined namespace. Essentially, I want the implementation for a function which will produce this kind of result:
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