P-var side effects

For example, when you want to call a C ++ template function interactively using the print or call commands, you may need to distinguish whether you mean the version of name that was specialized for int , name<int>() , or the version that was specialized for float , name<float>() . To use the word-completion facilities in this situation, type a single quote ' at the beginning of the function name. This alerts GDB that it may need to consider more information than usual when you press TAB or M-? to request word completion:

Use `cut` : if [ "`echo $var | cut -c1`" = "/" ] ; then .
Works in all shells, but inefficiently uses a pipe and external process for a trivial task. Use POSIX variable truncation: if [ "${var%${var#?}}" = "/" ]; then
Works with ksh, bash and other POSIX-compliant shells. Not obvious if you have not seen this one before. Fails on old Bourne shells. Dave Taylor in "Wicked Cool Shell Scripts" likes this one. Use POSIX pattern match inside of [[...]]: if [[ $var = /* ]]; then
Works with ksh, bash and other POSIX-compliant shells. Note that you must use [[...]] and no quotes around the pattern. The [[...]] syntax is handled internally by the shell and can therefore interpret "wildcard" patterns differently than an external command. An unquoted wildcard is interpreted as a pattern to be matched, while a quoted wildcard is taken literally. The [...] syntax, even if handled internally, is treated as though it were external for backward compatability. This requires that wildcard patterns be expanded to matching filenames. Use ksh (93 and later) and bash variable substrings: if [ "${var:0:1}" = "/" ]; then
ksh93 and later versions, and bash, have a syntax for directly extracting substrings by character position. ${varname:start:length} Example: ex17 display , text

Common (1% to 10%): Symptomatic hypotension/hypotension/abrupt blood pressure fall, sinus bradycardia/bradycardia (heart rate less than 50 beats/minute), severe tachycardia, ankle edema/edema, development/aggravation of congestive heart failure (CHF), atrioventricular (AV) block, peripheral edema
Uncommon (% to 1%): Second-/third-degree AV block, palpitations, orthostasis
Postmarketing reports: Angina pectoris/chest pain, AV dissociation, ECG abnormal, claudication, hypertension, myocardial infarction, sinus arrest with asystole, decreased myocardial contractility, cardiogenic shock, bradyarrhythmia in atrial fibrillation, vasculitis, erythromelalgia [ Ref ]

P-var side effects

p-var side effects


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