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Generate random 5 characters string
I want to create exact 5 random characters string with least possibility of getting duplicated. What would be the best way to do it? Thanks.
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What is simplest way to read a file into String? [duplicate]
I am trying to read a simple text file into a String. Of course there is the usual way of getting the input stream and iterating with readLine() and reading contents into String.
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A quick and easy way to join array elements with a separator (the opposite of split) in Java [duplic
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Using Java 8 you can do this in a very clean way:
String.join(delimiter, elements);
This works in three ways:
1) directly specifying the elements
String joined1 = String.join(",", "a", "b", "c");
2) using arrays
String[] array = new String[] { "a", "b", "c" };
String ...
Programmatically change input type of the EditText from PASSWORD to NORMAL & vice versa
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public void onClick(View view) {
if(buttons.get(2).getText().toString().equalsIgnoreCase(getResources().getString(R.string.show))){
editTexts.get(1).setInputType(InputType.TYPE_CLASS_TEXT);
editTexts.get(1).setSelection(editTexts.get(1).getText().length());
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What is the difference between square brackets and parentheses in a regex?
...rts that the subpattern in between these anchors are the entire match. The string will only match if the subpattern matches the entirety of it, not just a section.
() denotes a capturing group.
7|8|9 denotes matching either of 7, 8, or 9. It does this with alternations, which is what the pipe operat...
What is Hindley-Milner?
... of the length function: it can be "list of integers to integer", "list of strings to integer", "list of pairs to integer", and so on. In this case, a signal advantage of the Hindley-Milner system is that each well-typed term has a unique "best" type, which is called the principal type. The princi...
How do I escape curly braces for display on page when using AngularJS?
... '{person.name}' + '}!' }}" ...>
As you can see, we are building up a string from three smaller strings, in order to keep the curly braces separated.
'Hello {' + '{person.name}' + '}!'
This avoids using ng-non-bindable so we can continue to use ng- attributes elsewhere on the element.
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Why does C++11 not support designated initializer lists as C99? [closed]
...urmountable problems with this approach; given:
struct X {
int c;
char a;
float b;
};
What order would these functions be called in in c99: struct X foo = {.a = (char)f(), .b = g(), .c = h()}? Surprisingly, in c99:
The order of evaluation of the subexpressions in any initializer i...
Check whether a string is not null and not empty
How can I check whether a string is not null and not empty?
31 Answers
31
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Rails: Using greater than/less than with a where statement
...xibility with your ARel queries if you're able to use the hash syntax over strings which is why many would prefer this solution. Depending on your project/team/organization you may want something that is easier for someone glancing at the code to figure out, which the accepted answer is.
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