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Check if an apt-get package is installed and then install it if it's not on Linux
...ation as it stands. However you can't simply rely on return codes here for scripting or the output/lack of output alone for scripting. You would have to scan the output of these commands, limiting their usefulness for this question.
– UpAndAdam
Apr 30 '13 at 14...
What is the meaning of polyfills in HTML5?
...
A polyfill is a browser fallback, made in JavaScript, that allows functionality you expect to work in modern browsers to work in older browsers, e.g., to support canvas (an HTML5 feature) in older browsers.
It's sort of an HTML5 technique, since it is used in conjunctio...
Difference between `npm start` & `node app.js`, when starting app?
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From the man page, npm start:
runs a package's "start" script, if one was provided.
If no version is specified, then it starts the "active" version.
Admittedly, that description is completely unhelpful, and that's all it says. At least it's more documented than socket.io.
An...
Creating temporary files in bash
Are there objectively better ways to create temporary files in bash scripts?
5 Answers
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Backbone.View “el” confusion
... "click .btn" : "sayHello",
},
sayHello : function() {
alert("Hello");
},
render : function() {
this.$el.html("<input type='button' class='btn' value='Say Hello'></input>");
}
});
$(function() {
myView = new MyView({el:"#parent_id"});
m...
Push Notifications in Android Platform
I am looking to write an app that receives pushed alerts from a server. I found a couple of methods to do this.
20 Answer...
How to create a bash script to check the SSH connection?
I am in the process of creating a bash script that would log into the remote machines and create private and public keys.
1...
Meaning of $? (dollar question mark) in shell scripts
...ile non-zero values are mapped to various reason for failure.
Hence when scripting; I tend to use the following syntax
if [ $? -eq 0 ]; then
# do something
else
# do something else
fi
The comparison is to be done on equals to 0 or not equals 0.
** Update Based on the comment: Ideally, you sh...
How to print VARCHAR(MAX) using Print Statement?
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You could do a WHILE loop based on the count on your script length divided by 8000.
EG:
DECLARE @Counter INT
SET @Counter = 0
DECLARE @TotalPrints INT
SET @TotalPrints = (LEN(@script) / 8000) + 1
WHILE @Counter < @TotalPrints
BEGIN
-- Do your printing...
SET @Coun...
Efficiently test if a port is open on Linux?
From a bash script how can I quickly find out whether a port 445 is open/listening on a server.
14 Answers
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