free var

Recently many front-end friends to interview was asked to the difference between let and Var, in fact, Nanyi Teacher's ES6 has been very detailed introduction let of the use and var the difference. Let me summarize it briefly so that you can use it

Do I have to be free after create? Simple ExampleProcedure;VaR X: TX;BeginX: = Tx. Create;// Do someting;X. Free // if I am not free here, isn't this end equivalent to} Auto Release in C?That is to say, this free option is redundant here. Right?End;

Solution to insufficient space for/var/spool/clientmqueue in Linux Today, I received an alert email with the following content:------------------------------------ Alert content: Free disk space is less than 15% on volume/var-------------------------

Must be free after create. Simple examplesProcedure A;var x:tx;BeginX:=tx.create;Do someting;X.free//If I am not free here, this end is not the equivalent of C in the automatic release of the}.In other words, this free is superfluous here. Is that

Take: http://security.kali.org kali/updates/contrib Sources [B]Get: http://security.kali.org kali/updates/non-free Sources [B]Get: http://security.kali.org kali/updates/main amd64 Packages [351 KB]Get: http://security.kali.org kali/updates/contrib

In the previous articleArticleWe made the first graphic report, we directly use the and tags in HTML to load the image (fusioncharts free use document tutorial Chapter 3-fusioncharts free my first image ). In fact, we can also use a javascript

Encapsulation is one of the three characteristics of surface object programming, encapsulation is to combine the properties and services of an object into a separate unit, and to conceal the inner details of the object as much as possible, including

/Usr/bin/mysqladmin: connect to server at 'localhost' failed Error: 'Can't connect to local MySQL server through socket '/var/run/mysqld. Sock' (2) Check that mysqld is running and that the socket: '/var/run/mysqld. Sock' exists

Tag: Free memory script    mysql out of memory    VI recover_mem.sh#!/bin/bash #系统分配的区总量 mem_total= ' free-m |grep mem | awk ' {print $ } ' #当前剩余的free大小 mem_free= ' free-m |grep mem | awk ' {print $4} ' #当前已使用的used大小 mem_used= ' free-m

Install the iRedMail free email server in CentOS 6As we can see, many VPS users are not used to build websites, but to create email servers and send emails. Therefore, the old left also learns such functions. To learn how to build an email server,