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Sum a list of numbers in Python
... if you define it. That was supposed to be a place-holder for whatever you called the list that you're trying to work with. I can't guess what you called it.
– Karl Knechtel
Dec 6 '10 at 2:20
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How to output MySQL query results in CSV format?
...om/rx/1475/save-mysql-query-results-into-a-text-or-csv-file/
SELECT order_id,product_name,qty
FROM orders
WHERE foo = 'bar'
INTO OUTFILE '/var/lib/mysql-files/orders.csv'
FIELDS TERMINATED BY ','
ENCLOSED BY '"'
LINES TERMINATED BY '\n';
Using this command columns names will not be exported.
Als...
What is the difference between XMLHttpRequest, jQuery.ajax, jQuery.post, jQuery.get
...l have to write a little more code, because it needs a bit more options to call it.
Analogy
It's like you would be able to buy yourself a car engine that you'd have to create a whole car around it with steering, brakes etc... Car manufacturers produce completed cars, with a friendly interface (ped...
Static Block in Java [duplicate]
... body. The runtime system guarantees that static initialization blocks are called in the order that they appear in the source code.
If you have a class with a static look-up map it could look like this
class MyClass {
static Map<Double, String> labels;
static {
labels = new...
jQuery - prevent default, then continue default
...fault form submission behavior, then do my additional processing (it's basically calling Google Maps API and adding a few hidden fields to the form) -- and then I need the form to submit.
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Avoiding if statement inside a for loop?
I have a class called Writer that has a function writeVector like so:
4 Answers
4
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Check synchronously if file/directory exists in Node.js
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Note that fs.exists() is deprecated, but fs.existsSync() is not. (The
callback parameter to fs.exists() accepts parameters that are
inconsistent with other Node.js callbacks. fs.existsSync() does not
use a callback.)
You've specifically asked for a synchronous check, but if you can use an...
What does enumerable mean?
...e? Certain objects have some non-enumerable properties, for example if you call Object.getOwnPropertyNames([]) (which returns an array of all properties, enumerable or not, on []), it will return ['length'], which includes the non-enumerable property of an array, 'length'.
You can make your own non...
Value Change Listener to JTextField
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Add a listener to the underlying Document, which is automatically created for you.
// Listen for changes in the text
textField.getDocument().addDocumentListener(new DocumentListener() {
public void changedUpdate(DocumentEvent e) {
warn();
}
public void removeUpdate(Document...
Delete keychain items when an app is uninstalled
...you should put code to delete values from the keychain. Synchronize can be called to make sure the "FirstRun" key/value is immediately persisted in case the user kills the app manually before the system persists it.
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