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Get all keys of an NSDictionary as an NSArray
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the order of keys returned by allKeys is undefined... so allKeys.firstObject or allKeys][0] is dangerous either way
– Brad Thomas
Feb 24 '17 at 19:39
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HTML5 Pre-resize images before uploading
...t>
function handleFiles()
{
var filesToUpload = document.getElementById('input').files;
var file = filesToUpload[0];
// Create an image
var img = document.createElement("img");
// Create a file reader
var reader = new FileReader();
// Set the image once loaded into f...
How to make an anchor tag refer to nothing?
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Also an accessibility problem. You can resolve it by using a button element (generated from JavaScript so non-JS users don't get a broken control).
– Quentin
May 29 '09 at 8:13
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How can I rollback a github repository to a specific commit?
...ant to be the latest one on the remote server (everything after it will go bye-bye). To do this, in SourceTree, I right-clicked on the and selected "Reset BRANCHNAME to this commit".
Then navigate to your repository's local directory and run this command:
git -c diff.mnemonicprefix=false -c core...
How is location accuracy measured in Android?
...nyone know the proper interpretation of the accuracy measurements returned by getAccuracy()? For instance, are they calculated as:
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How do I check whether a checkbox is checked in jQuery?
... your existing code, you could therefore do this:
if(document.getElementById('isAgeSelected').checked) {
$("#txtAge").show();
} else {
$("#txtAge").hide();
}
However, there's a much prettier way to do this, using toggle:
$('#isAgeSelected').click(function() {
$("#txtAge").toggle...
Unfortunately MyApp has stopped. How can I solve this?
...oblem.
You only need to find out what exactly made your application crash, by analyzing the stack trace.
Read up on stack traces in "What is a stack trace, and how can I use it to debug my application errors?"
I still can't solve my problem!
If you've found your Exception and the line where it oc...
Rake just one migration
...heck the timestamps (Migration ID) for the previous migrations you've done by using
rake db:migrate:status
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How do I prevent Android taking a screenshot when my app goes to the background?
...on bar overflow, etc. — will be insecure. You can fix the Dialog problem by calling getWindow() on it and setting FLAG_SECURE. The rest... gets tricky. See this blog post for more.
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Can PHP PDO Statements accept the table or column name as parameter?
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Table and Column names CANNOT be replaced by parameters in PDO.
In that case you will simply want to filter and sanitize the data manually. One way to do this is to pass in shorthand parameters to the function that will execute the query dynamically and then use a s...