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How to print out a variable in makefile
... will pass to the shell:
.PHONY: all
all: ; $(info $$var is [${var}])echo Hello world
Now, what happens here is that make stores the entire recipe ($(info $$var is [${var}])echo Hello world) as a single recursively expanded variable. When make decides to run the recipe (for instance when you tell...
Make a Bash alias that takes a parameter?
...bash variables in quotes. eg mv "$1" "$1.bak". without quotes, if $1 were "hello world", you would execute mv hello world hello world.bak instead of mv "hello world" "hello world.bak".
– orion elenzil
Jun 11 '15 at 16:17
...
How do I specify new lines on Python, when writing on files?
...ly or within a single string, which is easier.
Example 1
Input
line1 = "hello how are you"
line2 = "I am testing the new line escape sequence"
line3 = "this seems to work"
You can write the '\n' separately:
file.write(line1)
file.write("\n")
file.write(line2)
file.write("\n")
file.write(line3)...
React.js: Identifying different inputs with one onChange handler
... state because it is composable by adding other values in your state:
var Hello = React.createClass({
getInitialState: function() {
return {input1: 0, input2: 0};
},
render: function() {
const total = this.state.input1 + this.state.input2;
return (
&...
How do I get a substring of a string in Python?
...
>>> x = "Hello World!"
>>> x[2:]
'llo World!'
>>> x[:2]
'He'
>>> x[:-2]
'Hello Worl'
>>> x[-2:]
'd!'
>>> x[2:-2]
'llo Worl'
Python calls this concept "slicing" and it works on more than j...
How to change the text on the action bar
...straction.
For example:
=> Normal way,
getActionBar().setTitle("Hello world App");
getSupportActionBar().setTitle("Hello world App"); // provide compatibility to all the versions
=> Customizing Action Bar,
For example:
@Override
public void setActionBar(String heading) {
//...
How do I add a simple onClick event handler to a canvas element?
...
For completeness, why your attempts didn't work...
elem.onClick = alert("hello world"); // displays alert without clicking
This is assigning the return value of alert() to the onClick property of elem. It is immediately invoking the alert().
elem.onClick = alert('hello world'); // displays ale...
Illegal string offset Warning PHP
... string. string will not understand that. In code we can see the problem:
"hello"["hello"];
// PHP Warning: Illegal string offset 'hello' in php shell code on line 1
"hello"[0];
// No errors.
array("hello" => "val")["hello"];
// No errors. This is *probably* what you wanted.
In depth
Let's s...
convert string array to string
...
string[] test = new string[2];
test[0] = "Hello ";
test[1] = "World!";
string.Join("", test);
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Difference between “process.stdout.write” and “console.log” in node.js?
..., you can just write something in there, like this:
process.stdout.write("Hello World\n");
If you don't put the break line at the end you will get a weird character after your string, something like this:
process.stdout.write("Hello World"); //Hello World%
(I think that means something like ...