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How can I convert ereg expressions to preg in PHP?
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The biggest change in the syntax is the addition of delimiters.
ereg('^hello', $str);
preg_match('/^hello/', $str);
Delimiters can be pretty much anything that is not alpha-numeric, a backslash or a whitespace character. The most used are generally ~, / and #.
You can also use matching bracke...
What is the difference between char s[] and char *s?
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The difference here is that
char *s = "Hello world";
will place "Hello world" in the read-only parts of the memory, and making s a pointer to that makes any writing operation on this memory illegal.
While doing:
char s[] = "Hello world";
puts the literal st...
Cannot set property 'innerHTML' of null
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You have to place the hello div before the script, so that it exists when the script is loaded.
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Print “hello world” every X seconds
Lately I've been using loops with large numbers to print out Hello World :
14 Answers
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Java lib or app to convert CSV to XML file? [closed]
...ng-array>
<string>string</string>
<string>hello world</string>
</string-array>
<string-array>
<string>float1</string>
<string>1.0</string>
</string-array>
<string-array>
<strin...
Insert line after first match using sed
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Try doing this using GNU sed:
sed '/CLIENTSCRIPT="foo"/a CLIENTSCRIPT2="hello"' file
if you want to substitute in-place, use
sed -i '/CLIENTSCRIPT="foo"/a CLIENTSCRIPT2="hello"' file
Output
CLIENTSCRIPT="foo"
CLIENTSCRIPT2="hello"
CLIENTFILE="bar"
Doc
see sed doc and search \a (append)
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Windows batch: echo without new line
...Using set and the /p parameter you can echo without newline:
C:\> echo Hello World
Hello World
C:\> echo|set /p="Hello World"
Hello World
C:\>
Source
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How to check if a variable is set in Bash?
...t. Then you can't assume that the variable is set.
– HelloGoodbye
Nov 12 '13 at 13:15
7
I agree, ...
Reuse a parameter in String.format?
Does the hello variable need to be repeated multiple times in the call to the format method or is there a shorthand version that lets you specify the argument once to be applied to all of the %s tokens?
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Remove all whitespace in a string
... want to remove leading and ending spaces, use str.strip():
sentence = ' hello apple'
sentence.strip()
>>> 'hello apple'
If you want to remove all space characters, use str.replace():
(NB this only removes the “normal” ASCII space character ' ' U+0020 but not any other whitespace...