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How do I programmatically set the value of a select box element using JavaScript?
..., '11')
function selectElement(id, valueToSelect) {
let element = document.getElementById(id);
element.value = valueToSelect;
}
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How does java do modulus calculations with negative numbers?
Am I doing modulus wrong? Because in Java -13 % 64 is supposed to evaluate to -13 but I get 51 .
14 Answers
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How to make a function wait until a callback has been called using node.js
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The "good node.js /event driven" way of doing this is to not wait.
Like almost everything else when working with event driven systems like node, your function should accept a callback parameter that will be invoked when then computation is complete. The caller sho...
How do I implement basic “Long Polling”?
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It's simpler than I initially thought.. Basically you have a page that does nothing, until the data you want to send is available (say, a new message arrives).
Here is a really basic example, which sends a simple string after 2-10 seconds. 1 in 3 chance of returning an error 404 (to show error ...
How do I change the title of the “back” button on a Navigation Bar
...tViewController navigationItem] setBackBarButtonItem: newBackButton]; Am I doing something wrong?
– JonB
Apr 25 '10 at 12:18
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How do I use boolean variables in Perl?
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@BlueWaldo: you can also use cmp and <=> when comparing and assigning the results of the comparison to a scalar. $var = $var1 cmp $var2; 'cmp' and '<=>' (used for numeric comparisons) returns -1, 0, or 1 if left argumen...
How to fix 'android.os.NetworkOnMainThreadException'?
...id, RSSFeed> {
private Exception exception;
protected RSSFeed doInBackground(String... urls) {
try {
URL url = new URL(urls[0]);
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
...
How can I use a DLL file from Python?
...en (in Python 2.5). This has been, by far, the easiest way I've found for doing what you ask.
import ctypes
# Load DLL into memory.
hllDll = ctypes.WinDLL ("c:\\PComm\\ehlapi32.dll")
# Set up prototype and parameters for the desired function call.
# HLLAPI
hllApiProto = ctypes.WINFUNCTYPE (
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Converting Select results into Insert script - SQL Server [closed]
... be easier than installing plugins or external tools in some situations:
Do a select [whatever you need]INTO temp.table_namefrom [... etc ...].
Right-click on the database in the Object Explorer => Tasks => Generate Scripts
Select temp.table_name in the "Choose Objects" screen, click Next.
I...
How to count string occurrence in string?
... string occurs in another string. For example, this is what I am trying to do in Javascript:
28 Answers
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