大约有 15,583 项符合查询结果（耗时：0.0185秒） [XML]
Checking from shell script if a directory contains files
...xCraft's article posted in 2007. Add 2>/dev/null to suppress the output error "No such file or directory".
See also Andrew Taylor's answer (2008) and gr8can8dian's answer (2011).
if [ -n "$(ls -A your/dir 2>/dev/null)" ]
then
echo "contains files (or is a file)"
else
echo "empty (or does ...
What's the difference between a Future and a Promise?
...;
})
...
.then(function(result){
console.log(result);
})
.catch(function(error){
console.log(error);
})
which makes asynchronous computation to look like synchronous:
try {
op1Result = syncOp1();
// do something
op1Result = syncOp2();
// do something more
op3Result = syncOp3();
//...
How to Flatten a Multidimensional Array?
...rge', []) (notice the empty array) returns null and triggers a php warning error. It's a slick solution if you know for a fact your array won't be empty, but that's not a common assumption many can make.
– goat
Jan 15 '15 at 6:42
...
Sending emails in Node.js? [closed]
...de.js New world for me</b>"
}
smtpTransport.sendMail(mail, function(error, response){
if(error){
console.log(error);
}else{
console.log("Message sent: " + response.message);
}
smtpTransport.close();
});
...
iOS app with framework crashed on device, dyld: Library not loaded, Xcode 6 Beta
...
This only solved on debugging mode. Error will again occur when you archive or build a project
– Saad Ur Rehman
Dec 9 '14 at 10:24
14
...
Maximum size of a element
...
I've ran into out of memory errors on Firefox with canvas heights greater than 8000, chrome seems to handle much higher, at least to 32000.
EDIT: After running some more tests, I've found some very strange errors with Firefox 16.0.2.
First, I seem to...
How to show google.com in an iframe?
...L(data.query.results.resources.content);
else if (data && data.error && data.error.description) loadHTML(data.error.description);
else loadHTML('Error: Cannot load ' + url);
};
var loadURL = function (src) {
url = src;
var script = document.createElement('script');
...
“Could not run curl-config: [Errno 2] No such file or directory” when installing pycurl
...
thanks for the python-dev package! i had this error without it : src/pycurl.h:4:20: fatal error: Python.h: No such file or directory
– Skullone
Apr 1 '19 at 14:14
...
How to remove all MySQL tables from the command-line without DROP database permissions? [duplicate]
...evart's version is correct, but here are some improvements to avoid having error. I've edited the @Devart's answer, but it was not accepted.
SET FOREIGN_KEY_CHECKS = 0;
SET GROUP_CONCAT_MAX_LEN=32768;
SET @tables = NULL;
SELECT GROUP_CONCAT('`', table_name, '`') INTO @tables
FROM information_sche...
download file using an ajax request
....php?get_file=true" or something... I have an ajax function that does some error checking on a form submission and then creates a csv file. If the error check fails, it has to come back with why it failed. If it creates the CSV it is telling the parent that "go ahead and fetch the file". I do that b...