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JavaScript check if variable exists (is defined/initialized)
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@geowa4 Actually, that will throw an error if the variable is undefined.
– kevinji
Apr 19 '11 at 4:59
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Insert a line at specific line number with sed or awk
I have a script file which I need to modify with another script to insert a text at the 8th line.
9 Answers
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ERROR 2003 (HY000): Can't connect to MySQL server on '127.0.0.1' (111)
...If you are using ubuntu, you have to use the following steps to avoid this error(if there is no replication enabled):
run the command vim /etc/mysql/my.cnf
comment bind-address = 127.0.0.1 using the # symbol
restart your mysql server once.
Update
In Step 1, if you cannot find bind-address in th...
Calling dynamic function with dynamic number of parameters [duplicate]
... because I didn't think [].xxx.call worked in IE but I can't reproduce the error now.
– Greg
Mar 24 '09 at 14:16
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How should I escape strings in JSON?
When creating JSON data manually, how should I escape string fields? Should I use something like Apache Commons Lang's StringEscapeUtilities.escapeHtml , StringEscapeUtilities.escapeXml , or should I use java.net.URLEncoder ?
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MSSQL Error 'The underlying provider failed on Open'
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I had this error and found a few solutions:
Looking at your connection string, it looks valid. I found this blog post, the problem here is that they were using Integrated Security. If you are running on IIS, your IIS user needs acces...
Reactjs: Unexpected token '
...as writing a simple component to display
li tag and came across this error:
17 Answers
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Read and write a String from text file
...write(to: fileURL, atomically: false, encoding: .utf8)
}
catch {/* error handling here */}
//reading
do {
let text2 = try String(contentsOf: fileURL, encoding: .utf8)
}
catch {/* error handling here */}
}
Swift 2.2
let file = "file.txt" //this is the file. we will...
How to use NSJSONSerialization
...ame":"Bbb"}]
This might give you a clear picture of how to handle it:
NSError *e = nil;
NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData: data options: NSJSONReadingMutableContainers error: &e];
if (!jsonArray) {
NSLog(@"Error parsing JSON: %@", e);
} else {
for(NSDictionary...
Javascript - How to detect if document has loaded (IE 7/Firefox 3)
I want to call a function after a document loads, but the document may or may not have finished loading yet. If it did load, then I can just call the function. If it did NOT load, then I can attach an event listener. I can't add an eventlistener after onload has already fired since it won't get cal...