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How to generate random SHA1 hash to use as ID in node.js?
...er to ensure hash uniqueness:
var current_date = (new Date()).valueOf().toString();
var random = Math.random().toString();
crypto.createHash('sha1').update(current_date + random).digest('hex');
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How to get MVC action to return 404
I have an action that takes in a string that is used to retrieve some data. If this string results in no data being returned (maybe because it has been deleted), I want to return a 404 and display an error page.
...
Test if element is present using Selenium WebDriver?
... and determines if it is present like this:
private boolean existsElement(String id) {
try {
driver.findElement(By.id(id));
} catch (NoSuchElementException e) {
return false;
}
return true;
}
This would be quite easy and does the job.
Edit: you could even go furth...
?? Coalesce for empty string?
Something I find myself doing more and more is checking a string for empty (as in "" or null) and a conditional operator.
...
Android: How can I pass parameters to AsyncTask's onPreExecute()?
...
/* Generic Async Task */
interface MyGenericMethod {
int execute(String param);
}
protected class testtask extends AsyncTask<MyGenericMethod, Void, Void>
{
public String mParam; // member variable to parameterize the function
@Override
protected...
How to open the Google Play Store directly from my Android application?
...
You can do this using the market:// prefix.
final String appPackageName = getPackageName(); // getPackageName() from Context or Activity object
try {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + appPackageName)));
} catch (android.conte...
How to dismiss keyboard for UITextView with return key?
...tView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
if([text isEqualToString:@"\n"]) {
[textView resignFirstResponder];
return NO;
}
return YES;
}
Swift 4.0 update:
func textView(_ textView: UITextView, shouldChangeTextIn range:...
Web API Put Request generates an Http 405 Method Not Allowed error
...issue for me:
public async Task<IHttpActionResult> SetAmountOnEntry(string id, [FromBody]int amount)
However ASP.NET would infer it correctly if complex object was used in the method parameter:
public async Task<IHttpActionResult> UpdateEntry(string id, MyEntry entry)
...
How do you discover model attributes in Rails?
...inspect.
irb(main):001:0> User.inspect
=> "User(id: integer, email: string, encrypted_password: string,
reset_password_token: string, reset_password_sent_at: datetime,
remember_created_at: datetime, sign_in_count: integer,
current_sign_in_at: datetime, last_sign_in_at: datetime,
current_s...
Aren't promises just callbacks?
...step, and return new promises themselves, they can just be chained without extra wrapping. That is, they compose.
– Dtipson
Dec 22 '15 at 19:11
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