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Sequence contains no elements?
...
From "Fixing LINQ Error: Sequence contains no elements":
When you get the LINQ error "Sequence contains no elements", this is usually because you are using the First() or Single() command rather than FirstOrDefault() and SingleOrDefault()....
What does rake db:test:prepare actually do?
...epare is a good solution for PG issues like this.
“PG::UndefinedTable: ERROR: relation does not exist” with a correct Rails naming and convention" where I couldn't just execute rake db:migrate RAILS_ENV=production
When, for example you can't create test database for a bug discussed here: "PG ...
Insert, on duplicate update in PostgreSQL?
...ubject to race conditions that mean it might still fail with duplicate key error if a row is inserted concurrently, or might terminate with no row inserted when a row is deleted concurrently. A SERIALIZABLE transaction on PostgreSQL 9.1 or higher will handle it reliably at the cost of a very high se...
YouTube iframe API: how do I control an iframe player that's already in the HTML?
...doesn't work!
A: "Doesn't work" is not a clear description. Do you get any error messages? Please show the relevant code.
Q: playVideo does not play the video.
A: Playback requires user interaction, and the presence of allow="autoplay" on the iframe. See https://developers.google.com/web/updates/20...
Possible heap pollution via varargs parameter
...ssign incorrect values into the list and the compiler will not trigger any error. For example, if T is a String then the following code will compile without error but will fail at runtime:
// First, strip away the array type (arrays allow this kind of upcasting)
Object[] objectArray = bar;
// Next...
How to use a WSDL
...ste into the address bar. Then fire the Arrow (go button).
If there is an error trying to load the file, then there must be a broken and unresolved url the file needs to resolve as shown below:
Refer to this answer for information on how to fix:
Stackoverflow answer to: Unable to create service ...
Registry Key '…' has value '1.7', but '1.6' is required. Java 1.7 is Installed and the Registry is P
...
Just had the similar error when installing java 8 (jdk & jre) on a system already running Java 7.
Error: Registry key 'Software\JavaSoft\Java Runtime
Environment'\CurrentVersion' has value '1.8', but '1.7' is required.
Error: could not find ...
Best way to resolve file path too long exception
...s all document libraries in a SP Site , but at one point it giving me this error (I tried looking at google but couldn;t find anything, now if anyone knows any trick to solve this problem please respond otherwise thanks for looking at it)
...
Change Schema Name Of Table In SQL
... + '].' + @table to make sure some special words/characters does not cause error.
– Stoinov
Nov 15 '18 at 11:56
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LINQ: Not Any vs All Don't
...TSource, bool> predicate)
{
if (source == null)
{
throw Error.ArgumentNull("source");
}
if (predicate == null)
{
throw Error.ArgumentNull("predicate");
}
foreach (TSource current in source)
{
if (!predicate(current))
{
re...