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What does the question mark operator mean in Ruby?
...haracter, will return the ASCII character code for A
For example:
?F # => will return 70
Alternately in ruby 1.8 you can do:
"F"[0]
or in ruby 1.9:
"F".ord
Also notice that ?F will return the string "F", so in order to make the code shorter, you can also use ?F.ord in Ruby 1.9 to get th...
Display number with leading zeros
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In Python >= 3.6, you can do this succinctly with the new f-strings that were introduced by using:
f'{val:02}'
which prints the variable with name val with a fill value of 0 and a width of 2.
For your specific example you can do...
How to resolve “You need to have Ruby and Sass installed and in your PATH for this task to work” War
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just -> gem install sass
– Danilo Cândido
Oct 27 '17 at 20:26
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String contains - ignore case [duplicate]
...{
if(str == null || searchStr == null) return false;
final int length = searchStr.length();
if (length == 0)
return true;
for (int i = str.length() - length; i >= 0; i--) {
if (str.regionMatches(true, i, searchStr, 0, length))
return true;
}
r...
How do I get the last four characters from a string in C#?
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mystring.Substring(Math.Max(0, mystring.Length - 4)); //how many lines is this?
If you're positive the length of your string is at least 4, then it's even shorter:
mystring.Substring(mystring.Length - 4);
...
Android dismiss keyboard
...thodManager) getSystemService(INPUT_METHOD_SERVICE);
if(imm.isAcceptingText()) { // verify if the soft keyboard is open
imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
}
}
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PHP substring extraction. Get the string before the first '/' or the whole string
...for the answer. It worked :) But one question. I am only able to do this -> $arr = explode('/',$mystring,2); echo $arr[0];. I am unable to get the first string in one statement itself - echo explode('/',$mystring,2)[0];. Since explode returns an array, I should be able to do it right? But I get a...
MySQL - Make an existing Field Unique
... ALTER IGNORE may still give Duplicate error on MySQL version > 5.5 and on InnoDB for the safety sake of your data. If you are just sure that keeping the first of the duplicated rows is the right thing, try set session old_alter_table=1. Don't forget to set it back. mysqlolyk.wordpres...
PHP Fatal error: Cannot redeclare class
... In @Jens-AndréKoch comment a "s" is missing in the second example --> it's class_exists('TestClass') === false or !class_exists('TestClass')
– furins
Aug 8 '13 at 16:08
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Could not load NIB in bundle
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In Targets -> Build Phases
Make sure the .xib is added to Copy Bundle Resources, if it is not present then add .xib file.
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