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Amazon EC2, mysql aborting start because InnoDB: mmap (x bytes) failed; errno 12
... I realized that the instance had basically zero free memory. So I tried restarting apache
sudo system httpd restart
sudo system mysqld restart
And everything worked fine. Maybe another solution is to configure apache to not eat up so much memory somehow.
...
How to pass a user defined argument in scrapy spider
... = 'myspider'
def __init__(self, category='', **kwargs):
self.start_urls = [f'http://www.example.com/{category}'] # py36
super().__init__(**kwargs) # python3
def parse(self, response)
self.log(self.domain) # system
Taken from the Scrapy doc: http://doc.scrapy.o...
HTTP Error 503, the service is unavailable
...It could be that the user identity is outdated, especially if you've tried starting a stopped app pool and the next request again fails.
In IIS, go to the Application Pools under the Server, then find the correct Application Pool for your web site, and click on it. On the Advanced Settings menu to ...
Match all elements having class name starting with a specific string [duplicate]
Is it possible to use a "wildcard" for elements having a class name starting with a specific string in CSS3?
3 Answers
...
Replace part of a string with another string
... str, const std::string& from, const std::string& to) {
size_t start_pos = str.find(from);
if(start_pos == std::string::npos)
return false;
str.replace(start_pos, from.length(), to);
return true;
}
std::string string("hello $name");
replace(string, "$name", "Somename...
Debugging Scala code with simple-build-tool (sbt) and IntelliJ
...g to specify the debug port:
sbt -jvm-debug 5005
Under the covers, this starts the JVM for SBT with the typical verbose debugging incantation:
-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005
You now can run your code as normal, for example with the sbt run command.
Confi...
Regular expression for a string that does not start with a sequence
...ing a bunch of tables using this program , but I need to ignore ones that start with the label "tbd_". So far I have something like [^tbd_] but that simply not match those characters.
...
Get string between two strings in a string
...t, @"key : (.+?)-").Groups[1].Value;
or with just string operations
var start = input.IndexOf("key : ") + 6;
var match2 = input.Substring(start, input.IndexOf("-") - start);
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Parse JSON in C#
...le\u0026#39;s \u003cb\u003e...\u003c/b\u003e""}],""cursor"":{""pages"":[{""start"":""0"",""label"":1},{""start"":""4"",""label"":2},{""start"":""8"",""label"":3},{""start"":""12"",""label"":4},{""start"":""16"",""label"":5},{""start"":""20"",""label"":6},{""start"":""24"",""label"":7},{""start"":""2...
Chrome DevTools Devices does not detect device when plugged in
...to the install directory of the ADB tools and type:
adb.exe (might need to start and stop ADB using adb kill-server and adb start-server)
Connect phone and browse to about:inspect in Chrome on desktop, ensuring a Chrome browser is open on your device
Following the above steps I got the RSA key fin...