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How to fix “Headers already sent” error in PHP
...ipt:line)
Some functions modifying the HTTP header are:
header / header_remove
session_start / session_regenerate_id
setcookie / setrawcookie
Output can be:
Unintentional:
Whitespace before <?php or after ?>
The UTF-8 Byte Order Mark specifically
Previous error messages or notices
...
Sending message through WhatsApp
...ageManager();
try {
Intent waIntent = new Intent(Intent.ACTION_SEND);
waIntent.setType("text/plain");
String text = "YOUR TEXT HERE";
PackageInfo info=pm.getPackageInfo("com.whatsapp", PackageManager.GET_META_DATA);
//Check if package exists or not. If n...
When does a process get SIGABRT (signal 6)?
...ignal to process
syscall <-----
http://blog.rchapman.org/posts/Linux_System_Call_Table_for_x86_64/
234 sys_tgkill pid_t tgid pid_t pid int sig = 6 = SIGABRT
:)
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Django: Display Choice Value
...
It looks like you were on the right track - get_FOO_display() is most certainly what you want:
In templates, you don't include () in the name of a method. Do the following:
{{ person.get_gender_display }}
...
Grunt watch error - Waiting…Fatal error: watch ENOSPC
...me research found the solution. Run the below command.
echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p
For Arch Linux add this line to /etc/sysctl.d/99-sysctl.conf:
fs.inotify.max_user_watches=524288
...
Save plot to image file instead of displaying it using Matplotlib
...able, whitespace around the image. Remove it with:
savefig('foo.png', bbox_inches='tight')
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Store a closure as a variable in Swift
...an example not sure if this is what you're after.
var completionHandler: (_ value: Float) -> ()
func printFloat(value: Float) {
print(value)
}
completionHandler = printFloat
completionHandler(5)
It simply prints 5 using the completionHandler variable declared.
...
In Java, how do I check if a string contains a substring (ignoring case)? [duplicate]
...(""))
return false;
Pattern p = Pattern.compile(needle,Pattern.CASE_INSENSITIVE+Pattern.LITERAL);
Matcher m = p.matcher(haystack);
return m.find();
}
example call:
String needle = "Need$le";
String haystack = "This is a haystack that might have a need$le in it.";
if( containsIgnoreCas...
In PowerShell, how do I define a function in a file and call it from the PowerShell commandline?
... to make sure the function is loaded by running:
ls function:\ | where { $_.Name -eq "A1" }
And check that it appears in the list (should be a list of 1!), then let us know what output you get!
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NoSql Crash Course/Tutorial [closed]
...oc.objType == "users") {
if (doc.age > 10) {
emit(doc._id, null)
}
}
}
That's all there really is to it.....it gets way more complex from there on the server end, as the server has to handle crashes, and multiple revisions of the same object, but this is just an exa...