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How to track child process using strace?
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There is a perl script called strace-graph. Here is a version from github. It is packaged with crosstool-ng versions of compilers. It works for me even used cross platform.
ARM Linux box.
$ ./strace -f -q -s 100 -o app.trc -p 449
$ tftp -pr app.trc 172.0.0.133
X86_64 Linux box.
$...
Detect when browser receives file download
...er;
var attempts = 30;
// Prevents double-submits by waiting for a cookie from the server.
function blockResubmit() {
var downloadToken = setFormToken();
setCursor( "wait", "wait" );
downloadTimer = window.setInterval( function() {
var token = getCookie( "downloadToken" );
...
Sending email with PHP from an SMTP server
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<?php
ini_set("SMTP", "aspmx.l.google.com");
ini_set("sendmail_from", "YOURMAIL@gmail.com");
$message = "The mail message was sent with the following mail setting:\r\nSMTP = aspmx.l.google.com\r\nsmtp_port = 25\r\nsendmail_from = YourMail@address.com";
$headers = "From: YOURMAIL@gmail....
getMonth in javascript gives previous month
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Because getmonth() start from 0. You may want to have d1.getMonth() + 1 to achieve what you want.
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Can't use NVM from root (or sudo)
...entioned that my application uses different version of NodeJS when running from sudo .
10 Answers
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Is there a standard way to list names of Python modules in a package?
...t really part of the package. And .pyo is another valid extension. Aside from that, using imp.find_module is a really good idea; I think this is the right answer.
– DNS
Jan 28 '09 at 22:39
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Repeat Character N Times
...t + pattern;
};
var a = "a";
console.debug(a.repeat(10));
Polyfill from Mozilla:
if (!String.prototype.repeat) {
String.prototype.repeat = function(count) {
'use strict';
if (this == null) {
throw new TypeError('can\'t convert ' + this + ' to object');
}
var str = ''...
How to convert an NSString into an NSNumber
...numberStyle = NSNumberFormatterDecimalStyle;
NSNumber *myNumber = [f numberFromString:@"42"];
If the string is not a valid number, then myNumber will be nil. If it is a valid number, then you now have all of the NSNumber goodness to figure out what kind of number it actually is.
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How to set a JavaScript breakpoint from code in Chrome?
... said, debugger; is the way to go.
I wrote a small script that you can use from the command line in a browser to set and remove breakpoint right before function call:
http://andrijac.github.io/blog/2014/01/31/javascript-breakpoint/
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Best way to check if a URL is valid
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<?php
$url = "http://www.qbaki.com";
// Remove all illegal characters from a url
$url = filter_var($url, FILTER_SANITIZE_URL);
// Validate url
if (filter_var($url, FILTER_VALIDATE_URL) !== false) {
echo("$url is a valid URL");
} else {
echo("$url is not a valid URL");
}
?>
Possible flags...