大约有 15,630 项符合查询结果（耗时：0.0275秒） [XML]
Core Data: Quickest way to delete all instances of an entity
...istentStoreCoordinator.execute(deleteRequest, with: myContext)
} catch let error as NSError {
// TODO: handle the error
}
Objective-C
NSFetchRequest *request = [[NSFetchRequest alloc] initWithEntityName:@"Car"];
NSBatchDeleteRequest *delete = [[NSBatchDeleteRequest alloc] initWithFetchRequest...
Bootstrap with jQuery Validation Plugin
...uery Validation Plugin, but I'm having a problem where the plugin puts the error messages when I'm using input groups.
15 A...
Adding Core Data to existing iPhone project
... core data to an existing iPhone project, but I still get a lot of compile errors:
13 Answers
...
Fully custom validation error message with Rails
Using Rails I'm trying to get an error message like "The song field can't be empty" on save. Doing the following:
17 Answer...
Break promise chain and call a function based on the step in the chain where it is broken (rejected)
...say you have something like the following:
stepOne()
.then(stepTwo, handleErrorOne)
.then(stepThree, handleErrorTwo)
.then(null, handleErrorThree);
To better understand what's happening, let's pretend this is synchronous code with try/catch blocks:
try {
try {
try {
var a...
PHP parse/syntax errors; and how to solve them
Everyone runs into syntax errors. Even experienced programmers make typos. For newcomers, it's just part of the learning process. However, it's often easy to interpret error messages such as:
...
How to send a custom http status message in node / express?
...'User already exists.');
Handle at Client side
Angular:-
$http().....
.error(function(data, status) {
console.error('Repos error', status, data);//"Repos error" 500 "User already exists."
});
jQuery:-
$.ajax({
type: "post",
url: url,
success: function (data, text) {
},
e...
How can I exclude all “permission denied” messages from “find”?
... be largely hypothetical.
* If your system is configured to show localized error messages, prefix the find calls below with LC_ALL=C (LC_ALL=C find ...) to ensure that English messages are reported, so that grep -v 'Permission denied' works as intended. Invariably, however, any error messages that d...
try {} without catch {} possible in JavaScript?
I have a number of functions which either return something or throw an error. In a main function, I call each of these, and would like to return the value returned by each function, or go on to the second function if the first functions throws an error.
...
mysql_fetch_array()/mysql_fetch_assoc()/mysql_fetch_row()/mysql_num_rows etc… expects parameter 1 to
...m trying to select data from a MySQL table, but I get one of the following error messages:
31 Answers
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